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SEQUENCE STRATIGRAPIDC. INTERPRETATION OF SEISMIC DATA NORTH OF 26°S, BOWEN AND SURAT . BASINS, QUEENSLAND

by T Wells, A T Brakel, J M Totterdell, R J Korsch & M G Nicoll

Record 1993/51

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AGSO

GECLOGICALSURVEY ORGANISATION

AGSO RECORD 1993/51

SEQUENCE STRATIGRAPHIC INTERPRETATION OF SEISMIC DATA NORTH OF 26°8, BOWEN AND SURAT BASINS, QUEENSLAND

By

A.T. WELLS, A.T. BRAKEL, J.M. TOTTERDELL, R.J. KORSCH & M.G. NICOLL Marine, Petroleum & Sedimentary Resources Division Australian Geological Survey Organisation Canberra

NGMA A CONTRIBUTION TO THE

NATIONAL GEOSCIENCE MAPPING ACCORD PROJECT: SEDIMENTARY BASINS OF EASTERN AUSTRALIA

•

*R9305101*

DEPARTMENT OF PRIMARY INDUSTRIES AND ENERGY Minister for Resources: Hon. David Beddall, MP Secretary: Greg Taylor

AUSTRALIAN GEOLOGICAL SURVEY ORGANISATION Executive Director: Harvey Jacka

© Commonwealth of Australia 1994

ISSN: 1039-0073 ISBN: 0 642 21302 X

This work is copyright. Apart from any fair dealings for the purposes of study, research, criticism or review, as permitted under the Copyright Act, no part may be reproduced by any process without written permission. Copyright is the responsibility of the Executive Director, Australian Geological Survey Organisation. Inquiries

should be directed to the Principal Information Officer, Australian Geological Survey Organisation, GPO Box 378, Canberra City, ACT, 2601.

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CONTENTS

Abstract

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iv

Introduction

1

Geological setting of the Bowen and Surat basins

5

Sequence boundaries and reflectors in the region

7

Fault mapping

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Structure contour and isopach maps

14

....... ............... ......... ................ .......... ..... 15

Conclusions ........................................................................................................ 20

Acknowledgements .............................................................................................. 20

References ......................................................................................................... 21

Appendices

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© Australian Geological Survey Organisation 1994

ABSTRACT This Record outlines the products derived from a sequence stratigraphic interpretation of Permian and Triassic sediments of the Bowen Basin and Jurassic sediments of the Surat Basin in central eastern Queensland north of 26°S. Examples of the interpretation, in the form of structure contour and isopach maps (in two-way time), and seismic sections are displayed, along with brief notes on the methods used in their compilation, and a resume of the characteristics of the sequence boundaries and their confined sequences. The structure contour maps and isopach maps available from the AGSO Sales Centre, and the data from Petroseis ™ available in digital format, are listed.

© Australian Geological Survey Organisation 1994

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1 INTRODUCTION

PROJECT BACKGROUND The Sedimentary Basins of Eastern Australia (SBEA) Project is a multidisciplinary study of the Bowen, Surat and Gunnedah Basins. It is part of the National Geoscience Mapping Accord and is a collaborative project between the Australian Geological Survey Organisation (AGSO, formerly the Bureau of Mineral Resources, BMR), Geological Survey of Queensland (Department of Minerals and Energy) and New South Wales Department of Mineral Resources (Geological Survey and Coal & Petroleum Geology branches), with cooperation from CSIRO, universities and industry. The Bowen, Surat and Gunnedah Basins have considerable resource potential and, although there have been regional studies of the basins in the past, there are still uncertainties as to their precise geometry, mode of formation, the response of the basin to tectonic events in the adjacent orogens, and the control exerted by these events on the timing and generation of hydrocarbons.

OBJECTIVES The aim of the project is to undertake an integrated basin analysis with emphasis on the tectonic, structural, sedimentary and thermal histories of the basins in order to assess their economic potential for hydrocarbons. This Record describes the interim products of the second phase of a regional seismic synthesis, and focuses on the application of the principles of sequence stratigraphy in the interpretation and integration of industry and BMR seismic data in the Bowen and Surat Basins, Queensland, between 230 30'S and 26°S (Fig. 1). It also includes examples of isopach and structure contour maps, in reduced format, based on this phase of interpretation, and briefly outlines the methods and techniques used to produce these maps. The maps are available through the AGSO Sales Centre, and digital data from the Petroseis ™ System Software are available in various file formats.

TECHNIQUES AND METHODOLOGY A network of industry seismic lines was selected to provide a regional coverage and, if feasible, a line spacing of no more than about 10 km (Figs 2, 3). Preference was placed on more recent multifold coverage surveys but in some areas only early single fold coverage was available and had to be used. Interpretation of the industry seismic lines commenced near Taroom in the northeastern corner of the Surat Basin (Totterdell et aI., 1992) and continued from there to about 23°30'S in the north and to the New South Wales border in the south. The area to the south, from 26°S to 26°40'S, has been described by Dixon et al. (1993) . Maps accompanying this report cover the area from 23 030'S to 26°S (Fig. 1). The

© Australian Geological Survey Organisation 1994

150' 20'

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Study area Concealed margin of Permo-Triassic sediments

Figure 1.

Locality map showing the area covered by this report.

© Australian Geological Survey Organisation 1994

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NEW ENGLAND OROGEN

BOWEN BASIN

SURAT BASIN

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Figure 2.

Map showing locations of the seismic lines that were interpreted in this study. For location of the map area see Figure 1.

northern border of the maps represents the northern limit of reasonable seismic coverage in the Bowen Basin, except for small isolated surveys and a limited amount of new shallow seismic data acquired for coalbed methane exploration. The principles of sequence stratigraphy (for example, Vail et al., 1977a, 1977b; Mitchum, 1977; Vail, 1988; Van Wagoner et aI., 1988, 1990) were applied to the interpretation of the seismic sections, commencing in the Taroom Trough where a

© Australian Geological Survey Organisation 1994

4

Figure 3.

Map showing responsibilities for interpretation of the seismic lines. ATB A.T. Brakel, JMT - J.M. Totterdell, ATW - A.T. Wells, ALL - all three interpreters. GSa - represents an area interpreted by the Geological Survey of QUeensland as part of their area south of 26°S (see Dixon et aI., 1993).

several kilometre thick succession of Permian and Triassic sediments is preserved beneath a comparatively thin succession of Jurassic sediments of the Surat Basin. Prominent reflections were selected for mapping and an assessment was made of associated stratal patterns and their significance in defining stratigraphic sequences

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5 in the sediments. Well ties were made using synthetic seismograms if digitised sonic logs were available; otherwise, standard graphic logs with well depths converted to two-way-time (TWT) using well velocity surveys or rms velocities were used. This allowed the sequences and sequence boundaries to be correlated with the lithostratigraphy (Fig. 4). Further details of the procedures followed are given in Totterdell et al. (1992). Well control in the eastern part of the region is sparse. By contrast, there is a much higher density of petroleum exploration wells on the western side of the basin in the Denison Trough, and correspondingly more information available on correlation with lithostratigraphic data. Direct line ties from east to west across the basin in the region are not possible because the few seismic lines acquired on the Comet Ridge are isolated from the more dense coverage over the Taroom and Denison Troughs on either side. After completion of the interpretation, verification of the closures around loop ties, correlating the selected seismic reflections with wells and recording the data, the boundaries on the interpreted lines were digitised and processed in the Petroseis ™ seismic data processing package. Using this system, structure contour and isopach maps of the network of industry seismic lines were produced. The PEP ™ system was used to process digital wireline log data for the production of synthetic seismograms.

GEOLOGICAL SETTING OF THE BOWEN AND SURAT BASINS

The Permian-Triassic Bowen Basin and the overlying Jurassic-Cretaceous Surat Basin are located in eastern Queensland and northern New South Wales (Fig.1). The Bowen Basin is the northernmost unit of the Sydney-Gunnedah-Bowen basin system. Outcrops of the Bowen Basin extend from the Collinsville area in the north, south to approximately 25°S, where they are unconformably overlain by sedimentary rocks of the Surat Basin. The Bowen Basin succession continues in the subsurface beneath the Surat Basin southwards into New South Wales, where it is contiguous with the Gunnedah Basin. During its development, the Bowen Basin was bounded to the east by the active New England Orogen, and to the west by a relatively stable craton of Early-mid Palaeozoic rocks. The basin contains up to 10 km of terrestrial and shallow marine, largely clastic sediments, along with substantial deposits of black coal. The thickest successions are found in the Taroom and Denison Troughs, which are separated by the Comet Ridge. The generalised stratigraphy of the Bowen and Surat Basins in the study area, as well as correlations between the successions in the Taroom Trough and the Denison Trough, are shown in Figure 4. The Surat Basin is continuous with the Eromanga Basin across the Nebine Ridge in the west, and with the Clarence-Moreton Basin across the Kumbarilla Ridge in the east. The basin extends well into New South Wales where it unconformably overlies the Gunnedah Basin and parts of the Lachlan Orogen. The Surat Basin succession consists of up to 2500 m of generally flat-lying, clastic sedimentary rocks that were

© Australian Geological Survey Organisation 1994

6

TAROOM TROUGH

DENISON TROUGH

Injune Creek Group

Injune Creek Group

Hutton Sandstone

Hutton Sandstone S30 [westgrove Ironstone Mbr

------------------ S25

_~e~tgr~ve_lro_nst?n~ M~~J Evergreen Formation

Evergreen Formation Precipice Sandstone

- - - - - - - - - Moolayember Fm

S20

Precipice Sandstone

S10

895 - - - - - - - - - - Moolayember Fm

Clematis Group

800 - - - - - - - - - - - - - - - - - Showgrounds Sandstone 885 - - - - - - - - - - - - Clematis Gp

Rewan Group

880 - - - - - - - - - - - - - - - - - 875- - - - - - - - - - - - -Rewan Group

8andanna Formation

870

8aralaba Coal Measures

865

z

81ack Alley Shale Gyranda Formation 8 6 1 - - - - - - - - - - - - - - - - - - ? 860 - - - - - - - - - - - - - - - - - a: Peawaddy Formation Flat Top Formation ~ 8 5 6 - - - - - - - - - - - - - - - - - - ? 855 - - - - - - - - - - - - - - - - - w Ingelara Formation 8arfield Formation
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Freitag Formation Oxtrack Formation 850 - - - - - - - - - - - - - - - - - ? ? rvJVvv\'I!VV'\.fV").,f\.! Aldebaran . 845----------------- ? Sandstone z 840 ? ~ Cattle Creek Formation 8uffel Formation :a: 8 3 1 - - - - - - - - - - - - - - - - - ? 8 3 0 - - - - - - - - - - - - - - - - - Reids Dome Camboon Volcanics c. 8 2 5 - - - - - - - - - - - - - - - - ~ 815 beds flAf>.AAfl

ffi

a: w

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1110/68

- -- -- Maximum flooding surface - - - - Sequence boundaries Other boundaries ('f1-'I1"l Major unconformities Correlation between columns uncertain ?

Figure 4.

Stratigraphy and sequence boundaries in the Taroom Trough and Denison Trough north of 26°S, Bowen and Surat basins, Queensland.

© Australian Geological Survey Organisation 1994

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7 deposited in fluvio-Iacustrine to shallow marine environments. Sedimentary rocks of the Surat Basin are more widespread than those of the Bowen Basin, although the greatest sediment thickness approximately coincides with the axis of the underlying Taroom Trough. The Bowen Basin was initiated in the latest Carboniferous-Early Permian as a result of back-arc extension associated with subduction along a continental margin volcanic arc (Cam boon Volcanic Arc). Following a period of subsidence driven by thermal relaxation, the basin was affected by compression which commenced in the mid-Permian; this is interpreted as the onset of foreland basin conditions. From the Late Permian to the late Early Triassic, foreland loading resulted in accelerated subsidence in the Taroom Trough and the compressional event inverted the earlier extension-related structures. This period of shortening culminated in the Middle to Late Triassic. After erosion and peneplanation, sedimentation resumed in a gently subsiding intracratonic sag (Surat Basin) in the Early Jurassic. For a more comprehensive summary on the geological setting and tectonic development of the Bowen and Surat Basins see Totterdell et al. (1992) and in references cited therein.

SEQUENCE BOUNDARIES AND REFLECTORS IN THE REGION

The seismic sequence analysis was carried out by identifying discontinuities on the basis of reflection terminations according to the method of Vail (1988), and others. The identification and verification of sequence boundaries in the Bowen and Surat Basins relies on the recognition of a variety of stratal boundary types, and the ease of their recognition depends largely on the quality of the seismic sections. The sequence boundaries were recognised by stratal geometry (e.g., truncation, downlapping, overlapping), erosional features such as channels and erosional relief, and by other evidence of unconformities. Several horizons, most of them regarded as sequence boundaries, were chosen initially as the framework for the seismic interpretation, and these have been augmented by others. Most of these are within the Bowen Basin succession, one is the major unconformity between the Bowen and Surat basins, and the remainder lie within the Surat Basin succession. The sequence boundaries, and other important interpreted horizons, have been given alphanumeric codes (Fig. 4). Note, however, that these are different from the provisional codes used by Brakel et al. (1992) and Totterdell et al. (1992). Throughout the text, reference is made to seismic lines which contain good examples of the sequence boundaries. Some of these lines will be illustrated in a future publication which is currently in preparation. Little attempt has been made at present to identify the standard series of systems tracts defined by Van Wagoner et al. (1988). This is because most of the succession preserved in the region is non-marine, and the marine portion, mostly Permian, is relatively thin. Discriminating between systems tracts in non-marine sediments is not only difficult, but as the sequences themselves may be more related to tectonics and

© Australian Geological Survey Organisation 1994

8 sediment supply than to sea-level changes, the standard terminology for coastal margins is inappropriate.

PERMIAN The stratigraphically lowest sequence boundary interpreted in the seismic data is 815, which is the basal unconformity in the Denison Trough between coal measures of the Reids Dome beds and pre-Permian basement rocks (Devonian Timbury Hills Formation and others). An example can be seen on line 84-M421 (SP 570, 1300 ms). Pronounced angular relationships are usually visible and onlapping reflections are common. The equivalent time horizon in the Taroom Trough, within or at the base of the thick Camboon Andesite, has not been recognised in any seismic section. A sequence boundary 825 is apparent in many seismic sections within the Reids Dome beds, for example, lines 84-E413 (SP 355, 900 ms) and 84-M421 (SP 595, 1230 ms). It was first identified as an unconformity by Brown et al. (1983). 825 is not everywhere discernable, partly because some sections may lie along strike or because the overlying coal measures may be locally absent, but also because the lenticularity of coal seams can make its recognition ambiguous. Nor is it certain that all the 825 picks represent the same surface; it is quite possible that episodic tectonic adjustments within the Denison Trough led to local unconformities at several different levels. Therefore maps have not been produced for B25. An important regional sequence boundary is the base of the Early Permian marine rocks, corresponding to the Reids Dome-Cattle Creek boundary in the Denison Trough (831) and the Camboon-Buffel boundary in the Taroom Trough (830). It formed by the first major transgression in the Permian. This surface is commonly marked by obvious angular discordance, and in many sections displays a high acoustic impedance contrast. Good examples occur in lines BMR78.02 (SP 2490, 850 ms) and C83-GL-02 (SP 420, 3000 ms). A significant horizon, 840, equivalent to the base of the Aldebaran Sandstone has been mapped because the unit is a potential hydrocarbon reservoir. B40 is not a sequence boundary, but a lithological contact separating deltaic sandy sediments from underlying finer-grained marine beds. In some parts of the Denison Trough (e.g. line 83-R315), the horizon has been traced beyond the Aldebaran Sandstone into mostly fine-grained prodelta deposits assigned to the Cattle Creek Formation. B40 may be either a maximum flooding surface or a parasequence boundary. A significant sequence boundary is 845 and correlates with the intra-Aldebaran unconformity located in the upper half of the Aldebaran Sandstone. It corresponds to the pronounced break shown on figure 3 of Elliott (1985). It is displayed in some sections (e.g., 80-P111; BMR78.02, SP 2780, 670 ms; 80-M5, SP 260, 1000 ms) as a low angle discordance, but is more commonly very subtle or apparently concordant. A significant sequence boundary (850) formed at the base of a transgressive systems

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9 tract and is marked by low-angle discordances and/or onlaps or downlaps in many sections in the Denison Trough (e.g., line BMR78.02, SP 3140, 675 ms). It is correlated with the sub-Freitag unconformity which was identified as such by Cundill & Meyers (1964) from well logs. There is some confusion over the use of the term Freitag Formation. The Freitag Formation was defined in outcrop by Power (1966), and therefore is the official Freitag by definition. There is, as well, Power's subsurface correlate of the surface unit, and referred to also as the undefined IIDonnerstag Formation ll (Price, 1983) and IIWarrinilla Formation ll (Elliott, 1985). It was clearly Power's intention to apply the name Freitag to the latter unit overlying the unconformity. This is how the name has been used in many subsequent publications, and it is used in this sense here. The lithologic nomenclature needs to be clarified, but is beyond the scope of this report. It is uncertain whether the base of the Oxtrack Formation (or Mount Ox Group of Draper et aI., 1990) of the eastern Taroom Trough correlates with B45 or 850. The base of the Oxtrack Formation is a major unconformity below which the whole of the Fauna III zone is missing. It is therefore likely to be equivalent to the predominant unconformity in that part of the Denison Trough succession, that is, 850. The Oxtrack base cannot be picked separately as a sequence boundary in the east because the Buffel Formation is too thin to be seismically resolved, and the surface merges with the underlying B30. Horizon 855, at or near the base of the Flat Top Formation in the Taroom Trough, is usually a strong but variable amplitude reflection, exemplified by the strong trough flanked by strong peaks in line S84-BM-06 (SP1950, 3400 ms). Though it shows no explicit evidence of being a sequence boundary, palaeontological work (Parfrey, 1988) suggests that it is possibly equivalent to the base of the Peawaddy Formation (856) in the Denison Trough to the west. The latter level has been interpreted to be of tectono-sedimentary significance by Dickins (1983), in that it records a marine transgression, which is unconformable in places and marked by the introduction of volcanic detritus. 856 is usually difficult to identify without recourse to well ties, and convincing truncations below it are rarely visible. The next mapped horizon (860) in the Taroom Trough lies at or above the base of the Gyranda Formation, and is the strong reflection in line C83-GL-02 at SP 480, 2740 ms. Throughout this region, the horizon usually displays no sequence boundary characteristics, but some truncations below it and onlapping strata have been interpreted in some sections. In the northern part of the study area, downlapping relationships are well displayed in lines 0880-1 and 0880-2. It may therefore be a subtle expression of a sequence boundary, especially if our belief, that it is the same surface as 861 at the base of the 81ack Alley Shale in the west, could be confirmed. Unfortunately, no seismic survey has successfully imaged the stratigraphy across a gap between the Comet Ridge and the Taroom Trough. Truncations (usually vague) have been found below 861 on several lines, for example, 84-M405 (SP 360, 830 ms). Our field studies, which showed that the contact between the Peawaddy Formation and the overlying Black Alley Shale near Carnarvon Gorge truncates sandstone and

© Australian Geological Survey Organisation 1994

10 mudstone beds, and the suggestion of a hiatus between the same formations in figure 4 of Dickins (1983), are consistent with it being a sequence boundary. Horizon B65 is usually expressed as the base of a zone of strong reflections, as in line C83-GL-02 (SP 480,2530 ms) illustrated in figure 3 (B17) of Brakel et al. (1992). It is equivalent to the base of the Baralaba Coal Measures and Bandanna Formation. The horizon does not usually show features associated with sequence boundaries. There are some truncations of underlying beds in only a few seismic sections (e.g., line BMR78.02, SP2110, 875 ms), and in the context of the overlying deltaic coal measures, most of these may be prodelta foresets, that is, there may be a toplap relationship. Beds onlap the surface in line 79-E12 (SP 360, 870 ms) in the Denison Trough, perhaps because of local differential subsidence. In line 88-M16 there is a local unconformity. While the identity of B65 as a possible sequence boundary is unresolved, it at least represents a parasequence boundary. A particularly significant sequence boundary is B70 which equates with the top of the Permian upper coal measures and base of the Rewan Group. As the nature of B70 is the subject of some debate among different workers, it is appropriate to elaborate on the reasons for our interpretation of it as a sequence boundary. First, note that there are differing definitions of the base of the Rewan Group. Jensen (1975) and some workers concerned with coal geology chose the top of the highest coal seam as the boundary for practical reasons, whereas other authors, such as Chiu Chong (1969), chose a higher boundary marked by a change from predominantly light grey and white sediments of the coal measures to the greenish colored sediments of the Rewan Group. Choosing the highest coal seam as the boundary is easier for mapping purposes, but where overlying coal measure clastics are preserved, a boundary so defined will inevitably be conformable. Also, where coal seams lens out or are eroded away, it leads to vertical IIjumpsll in the boundary which are artificial and can give a misleading impression of the highest coal seam in some areas being coeval with basal IIRewan ll sediments. To understand the basin-filling processes involved, the higher choice of boundary is more meaningful. A number of authors have reported that the contact between the Blackwater and Rewan Groups is locally disconformable and sharp. Dickins and Malone (1973, p. 72) note disconformities in the northern Bowen Basin and near Blackwater; local

disconformities in the Blackwater region are also mentioned by Malone et al. (1969, pp. 54-55). In the Denison Trough and nearby Comet Ridge area, local low-angle unconformities and disconformable contacts have been described by Mollan et al. (1969, pp. 42-43; 1972, p. 31). A dipmeter survey in the Warrinilla 1 well showed a 10° dip difference across the contact between the two groups (Cundill and Meyers, 1964, p. 133). On the other side of the Bowen Basin in the Moura area, plotting of the basal Rewan contact in boreholes showed that it is regionally disconformable with local slight angular unconformities (Chiu Chong, 1969, p. 3). A similar conclusion was reached by Foster (1979, p. 138) for the Moura - Kianga area, on the basis of an abrupt change in palynomorph assemblages at this level, but south of Theodore the assemblage change is gradual (Foster, 1979, p. 127). Thus an erosion surface hundreds of kilometres in extent is present at this level, which is one of the criteria

© Australian Geological Survey Organisation 1994

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11 advocated by Flint (1993) to recognize sequence boundaries in fluvial settings. Flint's other criteria are also applicable, namely an abrupt increase in sandstone amalgamation and an increase in mean grain size, suggesting a change in hydraulic regime and in the amount of accommodation space. These changes could have been brought about by tectonics and/or climate and sea-level variations, but tectonics was probably dominant (Brakel et aL, 1993). B70 is generally a strong reflection at the top of a zone of strong reflections caused by coal seams, for example, in line C83-GL-03 (SP 480, 2300 ms). Erosional relief on it is visible in places, underlying strata are truncated in many sections, and locally there are onlaps (B33 in line C83-GL-02 in fig. 3 of Brakel et aI., 1992) and downlaps onto it. Examples of channels in this surface in line 81-H50 (SP 372 and 415) have incisions of about 40 m and 20 m respectively.

TRIASSIC All the horizons picked within the Triassic succession are now regarded as probable sequence boundaries. The seismic expressions of B80, B85, B90, and -895 are illustrated in Figure 5 (and also as B48, B20, B46 and B10 in line T82-L-105 in fig. 4 of Brakel et aL, 1992). The relationships of the sequence boundaries to lithostratigraphic units defined in outcrop (eg., Jensen, 1975) are shown in Figure 6. An angular discordance has been described at the base of the Brumby Sandstone Member ("Malta GrW) by Woolley (1944, cited by Jensen, 1975, p. 25), in the Arcadia Valley on the eastern side of the Denison Trough. This occurs in the upper Sagittarius Sandstone of the lower Rewan Group, but locally the erosion has cut down into the top of the Bandanna Formation (Mollan et aL, 1969). Coarse-grained detritus was deposited on the unconformity surface, which has a 15° discordance with the underlying beds. In the vicinity of 148°30'E, 25°15'S, a seismic interpretion of an angular discordance (B71) low down in the Rewan Group, of only local extent, may correspond to the reported discordance. It has been traced on only eight seismic lines (e.g. 88-Z4, SP 630, 130 ms), and this restricted occurrence roughly coincides with a high-standing part of the basement on the eastern side of the Denison Trough. Because of the localised occurrence of this horizon and the limited seismic coverage, no maps have been produced for it. The quality of the seismic data above B70 is not sufficiently good to be completely positive in the interpretation, and in the Arcadia Valley region the quality is too poor to recognize or trace B71 there. Regardless of the validity of the seismic interpretation, the outcrop observations suggest evidence of local tectonic activity at the time. Within the Arcadia Formation of the upper Rewan Group (Fig. 6) lies a horizon (875) that is truncated by the sequence boundary (BSO) above it (as in line CS3-GL-02), and is therefore locally absent. It can appear as a strong trough flanked by strong peaks, for example, in line S84-BM-06 (Fig. 5), at SP 1950, 2000 ms, but on many other lines it is poorly defined. Although its nature as a sequence boundary is usually unclear, it can be seen possibly truncating strata below it and with on laps above in rare

© Australian Geological Survey Organisation 1994

12

S84-BM-06

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Characteristics of sequence boundaries identified on seismic lines S84-BM-06 and C83-T-04, Taroom region of the Taroom Trough.

© Australian Geological Survey Organisation 1994

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'IJIf\J\.. Sequence boundary

'\f\f\f\. Major unconformity

Sequence boundaries and their relationship to lithostratigraphic units in the Triassic sedimentary rocks of the Bowen Basin.

instances. The best example of truncations is in line OB80-2 (SP 440-500). The horizon B80 truncates B75 as well as many other beds is a major sequence boundary and represents the base of the Clematis Group. It is only intermittently well developed, but is a strong reflection in some lines, for example, S84-BM-06 (Fig. 5), and in places it separates two distinctly different packages of reflections, for example, line C83-T-04 (Fig .5). The base of the Clematis Group has been described previously as locally disconformable (Oickins & Malone, 1973) or erosional (Elliott & Brown, 1988), and is considered by Elliott (1993) to represent a major deformational event. The horizon B85 shows high impedance contrast in places, such as in line S84-BM-06 (Fig. 5) at SP 1630, 1200 ms, but is not evident as a sequence boundary. It occurs within the Clematis Group. In the well Tiggrigie Creek 1, however, it ties approximately with the base of a unit interpreted as the Showgrounds Sandstone (Elliott & Brown, 1988), a unit that further south on the Roma Shelf is known to have a hiatus below it, implying that it is an erosion surface, at least locally. Horizon 890 truncates underlying beds in some lines, and in C82-T-54 it cuts off the B85 surface. Usually, however, it does not show this trait, and on the poorer quality seismic lines can be difficult to identify. It is correlated with the base of the

© Australian Geological Survey Organisation 1994

14

Moolayember Formation. South of the present study area, B90 is, in places, known to be a very prominent and important erosion surface A better-developed truncation surface (895) is present within the Moolayember Formation, and is typified by the reflection at SP 1820, 240 ms in line S84-BM-06 (Fig. 5). South of Roma outside the present study area, however, B95 has not been recognised.

JURASSIC The most pronounced unconformity in the region, 522 (Fig. 4), is the base of the Surat Basin succession. It represents the peneplanation surface formed during the Late Triassic, following a major compressional episode. Erosion of uptilted beds is conspicuous near the eastern margin of the Bowen Basin (e.g., line 83-52/8, see fig. 8 of Totterdell et aI., 1992). In the axial portion of the Taroom Trough the angular discordance is not as great, and in places the reflections are parallel. Two horizons have been picked in the overlying sediments, corresponding to the Precipice-Evergreen boundary (S20) and the oolitic Westgrove Ironstone Member of the Evergreen Formation (S25) in the GSa DRD 6 bore. S20 is the strong reflection in line S84-CT-03 at SP 4740, 180 ms, but can be difficult to pick in some other lines. S25 is the strong reflection in the same line at SP 4950, 140 ms. We have found no seismic evidence so far that either is a sequence boundary, however Elliott & Brown (1988) report a reflector coinciding with the boundary of the Boxvale Sandstone Member and the overlying Westgrove Ironstone Member as a IIbasin-wide sequence boundaryll. The ironstone records widespread chemical sedimentation, denoting a deficiency of clastic input, at the time of a possible marine incursion, as suggested by the presence of acritarchs reported by McKellar (1974). If the acritarchs signify true marine conditions, then such IIsediment starvation II would be indicative of a maximum flooding surface. An alternative explanation has been proposed by O'Brien & Wells (in press), who discuss a similar coeval environment in the Clarence-Moreton Basin, where they postulate extensive lake formation as a result of a IIbackwater effectll generated by sea level rise, with acritarchs being introduced by upstream invasion of sea water during low flow periods. In such a scenario, the oolite formation in the lakes would not, strictly speaking, be at a maximum flooding surface, although it would occur at the same time as maximum flooding affected the continental shelves.

Two reflections (830 and 540) picked by us at higher stratigraphie levels to the south of 26°S could not be recognized in the region under discussion here.

FAULT MAPPING

Faults were interpreted on seismic lines that were approximately orthogonal to the strike of the faults and then, where possible, the geometries of the faults were mapped

© Australian Geological Survey Organisation 1994

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•

•

• • •

• • • • • • • • • • •• • • • • •• • • • • • • • • • • • • •

15 onto intersecting seismic lines. To compile a map of the faults, the intersections of the faults and the sequence boundaries were mapped for the 830/831 and the 870 horizons, and the faults interpreted between the positions of the seismic sections. The tip lines for the faults were noted and used to prepare an individual fault map for each sequence boundary. The faults were mapped initially at 1: 100 000 scale for final presentation at 1:500 000 scale. The faults were digitised using Petroseis ™ and are available in digital format. The individual fault maps have been incorporated into the relevant structure contour and isopach maps. Faults that had small amounts of displacement often could not be traced beyond one seismic section and created a problem for interpretation and display. Because there is no control over the orientations of these faults, they are shown on the maps as short faults perpendicular to the seismic section.

STRUCTURE CONTOUR AND ISOPACH MAPS

Structure contour and isopach maps have been generated for the 80wen and Surat basins in the area that has been seismically mapped between 23°30'S and 26°S, and are displayed on paper copies at a scale of 1:500 000. The maps are examples of contour maps that can be produced from the data compiled during the interpretation of seismic reflections in a regional network of seismic lines from the Taroom and Denison Troughs. Petroseis ™ software was used to digitise interpreted seismic horizons and produce structure contour maps of the sequence boundaries in two-way travel time, and isopach maps of the interval between sequence boundaries, also in two-way travel time. Whilst not equivalent to true structure contour or isopach maps, these time-based maps provide a useful indicator of structural geometry or thickness trends within the succession. For the structure contour maps, the data were gridded with a 1000 m grid cell size. The contours are well constrained in areas where there is a reasonably close line spacing, but they are poorly constrained in areas where there are few lines. All structure contour maps are displayed with a contour spacing of 100 ms. On at least one of the isopach maps, however, where the total thickness being contoured is relatively thin, a contour interval of 25 ms was used, leading to some spurious contours or artifacts generated by the contouring software (such as string of pearls and hourglass artifacts; see Krajewski & Gibbs, 1994). Thus for the isopach maps, the grid cell size was increased to 2500 m or 5000 m to eliminate some of the artifacts. The contour spacing used for the isopach maps depended on the maximum thickness of the interval being contoured, with intervals of 100 ms, 50 ms and 25 ms being used on different maps. In most cases, the faults mapped in the seismic sections were used by the contouring software to constrain the structure contour patterns. In a few cases, however, the contours were generated without the faults, which were later included on the maps as an overlay. In particular, this was done in the Yarrabee Zone (Blackwater-Shotover

© Australian Geological Survey Organisation 1994

16 area) because the geometry of the numerous faults was not easily determined, and where only a limited number of sequence boundaries were interpreted on widely spaced lines. The isopach maps were gridded and contoured without the faults, in an attempt to reflect the true sedimentary thickness at the time of depsoition. The relevant portions of the 1:500000 Bowen Basin Solid Geology map (Balfe et aI., 1988) were also digitised using Petroseis TM. This included the contacts with basement, mapped faults in areas where there was no seismic coverage, and formation boundaries where they correlated with sequence boundaries or seismic horizons determined in this study. These features, along with the faults mapped in the seismic data, were used to provide control on the position of the zero contours. The isopach maps were compiled by subtracting the two-way travel time of the upper sequence boundary from that of the lower sequence boundary. Thus, in areas where the base of one sequence has been eroded, or in areas where one of the sequences was not deposited, the complete interval between the two sequence boundaries does not exist. In these cases, the interval is shown as absent on the isopach maps, even though part of the interval may be still be present due to only partial erosion. Thus, some caution is necessary when interpreting the isopach maps. One isopach map for which particular care in interpretation is necessary is the B90S10 interval, which is approximately equivalent to the base of Moolayember Formation to the base of Precipice Sandstone (base of Surat Basin). This is because of an indeterminable amount of erosion of the MooJayember Formation that has occurred prior to the commencement of deposition of the Surat Basin. The map shows considerable thinning on the eastem margin of the Taroom Trough, which reflects the partial erosion of the Moolayember Formation due to tilting and uplift. It is not possible to estimate the amount of erosion of the formation in the centre of the Taroom Trough where the Surat Basin appears to be conformable on top of the Moolayember Formation. Partial erosion of the Moolayember Formation has also occurred on the westem margin of the Taroom Trough, and thus this map reflects the amount of the Moolayember Formation preserved to the present day, rather than its original depositional geometry. Examples of a structure contour map (Fig. 7) and an isopach map (Fig. 8) generated using the Petroseis ™ System Software from the digitised sequence boundaries are included in this Record. A cross-section (Fig. 9) along seismic line M-81A-7A illustrates the style of presentation available using Petroseis™ Software. The data are also available as a Petroseis™ dump file or as a UKOOA or other fixed format ASCII dump file. It should be noted that these maps and section are representative, and that a suite of 22 maps based on selected combinations of the mapped sequences and unit boundaries, together with digital data sets, are available from the AGSO Sales Centre, and are listed in Appendix 1. Data formats are listed in Appendix 2.

© Australian Geological Survey Organisation 1994

• • • • • • • • • • • • • • • • • •e

•• •• •

• •e

• •

•e •e. e:

• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •

17

\

/ /

I

o

10

~.

20

30

40

SO

60

70

80

90

",n,pn""

100

Kilometres

Figure 7.

Structure contour map in two-way travel time of the 855/856 reflector, which is approximately equivalent to the base of Flat Top/Peawaddy Formations.

CONCLUSIONS

Interpretation of a network of industry seismic lines in a transect across the 80wen and Surat 8asins north of 26°S using sequence stratigraphic techniques has indicated that many of the seismic reflectors in the Taroom Trough and the Denison Trough show the

© Australian Geological Survey Organisation 1994

18

\

o

I

/

,

I

I I I

/

I

\.,

",, \, \

148" o

w w

~

~

~

~

m

~

00

m

",.""",

Kilometres

. Figure 8.

Isopach map of the B60/B61-B65 interval, in two-way travel time, which is approximately equivalent to the interval from the base of Gyranda Formation/Black Alley Shale to the base of Baralaba Coal Measures/Bandanna Formation.

• • • • • • • • • • • • • • • • • • • • • • • • • • •

characteristics of sequence boundaries. The succession includes both non-marine and marine rocks and our study has newly recognised and defined sequence boundaries

• •

in non-marine rocks.

• • • •

The identification and verification of sequence boundaries in the Bowen and Surat Basins relies on the recognition of a variety of stratal boundary types, and the ease of

© Australian Geological Survey Organisation 1994

•

• • • • •• • • • • • • • • • • • • • • • • • • • • • • • • • • • •

19

1500

1400

or------r------------~------------~-------------r----~O

B~r_----------

__

-;;-

g

~

B80 B70

B61

B65 B61 B56 B45 B40

700 '----------------------------------....1700 o

2

I

I

Kilometres

Figure 9.

Cross section along seismic line - M-81A-7A, Nebine Ridge, showing relationships and geometry of units, including onlapping and truncation of Rewan Group.

their recognition depends largely on the quality of the seismic sections. The sequence boundaries were recognised by stratal geometry (e.g., truncation, downlapping, overlapping), erosional features such as channels and erosional relief, separation of packages of reflections of different character and by other evidence of unconformities; their relationship to defined lithostratigraphic units was established in well ties and correlation with outcrop data. In most cases, the stratal terminations and other indicators of sequence boundaries are mostly very subtle and evidence for a sequence boundary is usually scattered over several lines. Detailed isopach and structure contour maps have been generated to illustrate the

© Australian Geological Survey Organisation 1994

20 geometry of the mapped sequence boundaries and reflectors. This provides a better understanding of the distribution and geometry of the sedimentary packages, and their subsurface configuration.

ACKNOWLEDGEMENTS

This Record is a contribution to the National Geoscience Mapping Accord project Sedimentary Basins of Eastern Australia. We thank our colleagues in the project for their support. In particular, we are indebted to officers of the Geological Survey of Queensland for organising copies of the industry seismic sections and for the provision of data from QPED (Queensland Petroleum Exploration Database). We also wish to thank Santos Ltd (through Lindsay Elliott) and MIM Holdings Limited (through Dr R.A. Brotherton) for access to recently acquired seismic data prior to the data becoming open file. We thank Clinton Foster and Phil. O'Brien for their very useful comments on the manuscript.

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21 REFERENCES

Balfe, P.E., Draper, J.J., Scott, S.G. & Belcher, R.L., 1988. Bowen Basin Solid Geology. Queensland 1:500 000 Geology, Queensland department of Mines. Brakel, AT., Totterdell, J.M. & Wells, AT., 1992. Sequence boundaries interpreted from seismic data in the central Taroom Trough, SE Queensland. Proceedings of the

26th Newcastle Symposium on Advances in the Study of the Sydney Basin. Department of Geology, University of Newcastle, N.S. W., Publication 477, 64-71. Brakel, AT., Wells, AT. & Totterdell, J.M., 1993. Recognition of sequence stratigraphy in the Triassic fluvial succession of the Bowen Basin, Australia. In Yu, B. & Fielding, C.R. (Editors). Modern and ancient rivers - their importance to mankind. 5th

International Conference on Fluvial Sedimentology, Brisbane, July 1993, Keynote Addresses & Abstracts, 17. Brown, R.S., Elliott, L.G. & Mollah, R.J., 1983. Recent exploration and petroleum discoveries in the Denison Trough, Queensland. APEA Journal, 23, 120-135. Chiu Chong, E.S., 1969. Baralaba-Moura-Kianga-Theodore Coalfield - correlation of coal seams between Moura No.1 area and the southern boundary of Thiess Peabody Mitsui Coal pty Ltd franchise area. Geological Survey of Queensland, Report 28. Cundill, J. & Meyers, N., 1964. A discussion of the Permian geology in the area of the Planet Warrinilla and Warrinilla North wells. APEA Journal, 4, 133-139. Dickins, J.M., 1983. The Permian Blenheim Subgroup of the Bowen Basin and its time relationships. Proceedings of the Symposium on the Permian Geology of Queensland, Brisbane, 1982. Geological Society of Australia, Queensland Division, 269-274. Dickins, J.M. & Malone, E.J., 1973. Geology of the Bowen Basin, Queensland. Bureau of Mineral Resources, Australia, Bulletin 130. Dixon, 0., Hoffmann, K.L. & Simpson, G.A, 1993. Progress report on the sequence stratigraphic interpretation of seismic data from the Roma transect, Bowen & Surat Basins, Quensland. Queensland Department of Minerals and Energy, Queensland Geological Record 1993/24. Draper, J.J., Palmieri, V., Price, P.L., Briggs, D.J.C. & Parfrey, S.M., 1990. A biostratigraphic framework for the Bowen Basin. In Beeston J.W. (Compiler).Bowen Basin Symposium 1990 Proceedings. Geological Society of Australia, Queensland Division, 26-35. Elliott, L., 1985. The stratigraphy of the Denison Trough. In Bowen Basin Coal Symposium, Rockhampton, 1985. Geological Society of Australia, Abstracts, 17,33-38.

© Australian Geological Survey Organisation 1994

22 Elliott, L.G. & Brown, R.S., 1988. The Surat and Bowen Basins - a historical review. In Petroleum in Australia: the first century. Australian Petroleum Exploration Association, Melbourne, 120-138. Flint, S.S., 1993. The application of sequence stratigraphy to ancient fluvial successions. In Yu, B. & Fielding, C.R. (Editors). Modern and ancient rivers - their importance to mankind. 5th International Conference on Fluvial Sedimentology, Brisbane, July 1993, Keynote Addresses & Abstracts, K22-K32. Foster, C.B., 1979. Permian plant microfossils of the Blair Athol Coal Measures, Baralaba Coal Measures, and basal Rewan Formation of Queensland. Geological Survey of Queensland, Publication 372, Palaeontological Paper 45. Jensen, AR., 1975. Permo-Triassic stratigraphy and sedimentation in the Bowen Basin, Queensland. Bureau of Mineral Resources, Australia, Bulletin 154. Krajewski, S.A. & Gibbs, B.L., 1994. Computer contouring generates artifacts. Geotimes, 39(4), 15-19. Malone, E.J., Olgers, F. & Kirkegaard, AG., 1969. The geology of the Duaringa and Saint Lawrence 1:250,000 Sheet areas, Queensland. Bureau of Mineral Resources, Australia, Report 121. McKellar, J.L., 1974. Jurassic miospores from the Upper Evergreen Formation, Hutton Sandstone, and basal Injune Creek Group, north-eastern Surat Basin. Geological Survey of Queensland, Publication 361, Palaeontological Papers 35. Mitchum, R.M., 1977. Seismic stratigraphy and global changes of sea level, Part 1: Glossary of terms used in seismic stratigraphy. In Payton, C.E. (Editor). Seismic stratigraphy - applications to hydrocarbon exploration. American Association of Petroleum Geologists, Memoir 26, 205-212. Mollan, R.G., Dickins, J.M., Exon, N.F. & Kirkegaard, A.G., 1969. Geology of the Springsure 1:250 000 Sheet area, Queensland. Bureau of Mineral Resources, Australia, Report 123. Mollan, R.G., Forbes, V.R., Jensen, A.R., Exon, N.F. & Gregory, C.M., 1972. Geology

of the Eddystone, Taroom, and western part of the Mundubbera Sheet areas, Queensland. Bureau of Mineral Resources, Australia, Report 142. O'Brien, P.E., & Wells, AT., (Compilers), in press. The geology and petroleum potential of the Clarence - Moreton Basin, New South Wales and Queensland. Australian Geological Survey Organisation, Bulletin 241. Parfrey, S.M., 1988 - Biostratigraphy of the Barfield Formation, southeastern Bowen Basin, with a review of the fauna from the Ingelara and lower Peawaddy Formations, southwestern Bowen Basin. Queensland Department of Mines, Report, 1.

© Australian Geological Survey Organisation 1994

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23 Power, P.E., 1966. Revisions of the Permian stratigraphy of the Denison Trough. Queensland Government Mining Journal, 67, 109-116.

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• • • • • •• • • • • • • • • • • • • • • • • • • • •

Price, P.L., 1983. A Permian palynostratigraphy for Queensland. In Proceedings ofthe symposium on the Permian geology of Queensland, Brisbane, 1982. Geological Society of Australia, Queensland Division, 155-211. Totterdell, J.M., Wells, A.T., Brakel, A.T .. , Korsch, RJ. & Nicoll, M.G., 1992. Sequence stratigraphic interpretation of seismic data in the Taroom Region, Bowen and Surat Basins, Queensland. Bureau of Mineral Resources, Australia, Record 1991/102. Vail, P.R, 1988. Seismic stratigraphy interpretation utilizing sequence stratigraphy. Part 1: Seismic stratigraphy interpretation procedure. In Sequence stratigraphy workbook. Earth Resources Foundation, University of Sydney.

.

Vail, P.R, Mitchum, RM. & Thompson, S., 1977a. Seismic stratigraphy and global changes of sea level, part 3: Relative changes of sea level from coastal on lap. American Association of Petroleum Geologists, Memoir, 26, 63-81 .

,

Vail, P.R, Mitchum, RM. & Thompson, S., 1977b. Seismic stratigraphy and global changes of sea level, part 4: Global cycles of relative changes of sea level. American Association of Petroleum Geologists, Memoir, 26, 83-97. Van Wagoner, J.C., Posamentier, H.W., Mitchum, RM., Vail, P.R, Sarg, J.F., Loutit, T.S. & Hardenbol, J., 1988. An overview of sequence stratigraphy and key definitions. In Wilgus C.W. & others (Editors). Sea level changes: an integrated approach. Society of Economic Paleontologists and Mineralogists, Special Publication 42, 39-45. Van Wagoner, J.G., Mitchum, RM., Campion, K.M. & Rahmanian, V.D., 1990. Siliciclastic sequence stratigraphy in well logs, cores, and outcrops: concepts for highresolution correlation of time and facies. American Association of Petroleum Geologists, Methods in Exploration Series 7.

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24

APPENDIX 1. List of maps available through AGSO Sale Centre

22 MAPS AVAILABLE IN 2 FORMATS: A. 1:500 000 black & white contour maps B. Appproximately 1:1.23 million (A3 size) maps of colour-fill grid

Map No.

Description

1 80wen and Surat Basins north of 26°S: seismic line location map (interpreted lines only)

Structure Contour Maps (in two-way travel time; datum = 450 m) 2

3 4 5

6 7 8 9 10 11 12 13 14 15

830/B31 reflector - base of Buffel/Cattle Creek Formations B40 reflector - base of Aldebaran Sandstone 845 reflector - intra-Aldebaran Sandstone unconformity B50 reflector - base of Freitag Formation 855/B56 reflector - base of Flat Top/Peawaddy Formations 860/B61 reflector - base of Gyranda Formation/8lack Alley Shale 865 reflector - base of 8aralaba Coal Measures/8andanna Formation 870 reflector - base of Rewan Group 875 reflector - intra-Rewan group 880 reflector - base of Clematis Group 885 reflector - intra-Clematis Group/base of Showgrounds Sandstone 890 reflector - base of Moolayember Formation 895 reflector - intra-Moolayember Formation S10 reflector - base of Precipice Sandstone

Isopach Maps (in two-way travel time; datum 16 17 18 19 20 21 22

= 450 m)

830/831-855/856 interval - base of Buffel/Cattle Creek Formations to base of Flat Top/Peawaddy formations B55/856-B60/861 interval - base of Flat Top/Peawaddy Formations to base of Gyranda Formation/Black Alley Shale B60/861-B65 interval - base of Gyranda Formation/Black Alley Shale to base of Baralaba Coal Measures/8andanna Formation B65-B70 interval - base of Baralaba Coal Measures/Bandanna Formation to base of Rewan Group 870-B80 interval - base of Rewan Group to base of Clematis Group 880-890 interval - base of Clematis Group to base of Moolayember Formation 890-S10 interval - base of Moolayember Formation to base of Precipice Sandstone (base of Surat 8asin)

© Australian Geological Survey Organisation 1994

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25

Appendix 2 Data has been Appendix 2. Data from Petroseis available in digital format omitted from the hardcopy of Record 1993/51.

1. INTERPRETED SEISMIC DATA Digital data for the Bowen and Surat basins north of 26°S includes seismic line location and shot point data for all interpreted lines plus horizon (reflector) data for all horizons interpreted in the seismic sections. The digital data can be exported in the following formats: - Petroseis™ dump file, which can be imported into any Petroseis system. - UKOOA or other fixed format ASCII dump file.

- Data can be formatted for systems such as LANDMARK and GEOQUEST.

2. DIGITAL CONTOUR MAP DATA The 1:2.3 million colour-fill grid maps are available as digital files in formats such as HPGL, EPS or Petroseis PIC.

Further information on the digital data in terms of formats, release conditions and costs can be obtained from: AGSO Sales Centre Australian Geological Survey Organisation GPO Box 378 CANBERRA ACT 2601 PH (06) 249 9519 FAX (06) 249 9982

© Australian Geological Survey Organisation 1994

AGSO

BOWEN BASIN NORTH OF 26°S, QUEENSLAND 1. SEISMIC LINE LOCATION MAP (INTERPRETED LINES ONLY) 23 30

OOS~-----------r------~~--------------------------------------------~--------------------------------~~------------------------------------.--------------------------------------------------,

I

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A

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10

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20

30

40

50

I

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KILOMETRES

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AD92-02 -

ORCANISATION

1:500000

,:~ :..-'"

BMR89--B01B ------4---.._

STRALIAN

GECLOGlCALSURVEY

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~

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24 00 DOS

DRUMMOND BASIN

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CENTRAL MERIDIAN 14700 DOE

NEW ENGLAND OROGEN

81-H20

Seismic line with line name

DENISON TROUGH

T83-P-02

.#'.;0'> 9

TAROOM TROUGH

Injune Creek Group

Injune Creek Group

()

iii

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Hutton Sandstone

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Evergreen Formation

Precipice Sandstone

_________ MoolayemberFm

Hutton Sandstone

530

525 520 510

fCD \

'i'~ --+---.J-- AD91-12

~

v

V'

+

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Bandanna Formation

--t---\----t- a9-!36

...I---+!----------t-

BO- P' 1

~

Black Alley Shale

~

Peawaddy Fonnation

w

Ingelara Formation

:3~ 850 -

i.

Freitag Formation

- - - - - - - - - - - - - - - - 1

Aldebaran -B45-:--..-~------------ ~ _'1 . Sanostone ... - ,~ -~-- - Z B40 '1 :$ Cattle Creek Formation

+

+

ill

Flat Top Formation

1

Bartield Formation

Oxtrack Formation

? N"YY'1-r;;:,;;;:wwM;;;;.M'N'¥'"",,v -- . '-- ----- -

Buffel Formation

"831----------------- 7 8 3 0 - - - - - - - - - - - - - - - - - -

ffi

0..

Reids Dome

825-----------------

Camooon Volcanics

,. 'Y'1"l"M"l"('1"",be",d",s'('1''l'Y'M''M''l'"'''' ..l B151'

-1-----1 -------+-'1--1---

Gyranda Formation

~ 8 5 6 · - - - - - - - - - - - - - - - - - ? 855 - - - - - - - - - - - - - - - - - -

a: c w

79-57

Baralaba Coal Measures

865 - - - - - - - - - - - -

- 861 - - - - - - - - - - - - -----1 860 - - - - - - - - - - - - - - - - - -

t ¥ ~'~"__J---~-+-------~~c-::::-j::lf't1i B4-R40B

79-51

885 - - - - - - - - - - - - Clematis Gp

Rewan Group Rewan Group - -_________________ • 870 _________________ _

~

24 30 ODS

_________________ _

. - - - - - - - - -- - - - - - - - 880 - - - - - - - - - - - - - - - - - 875--------------

~~ __JL---~~--------------_t~I-_t---r_a4-R407 81-R13 ~

Precipice Sandstone

Showgrounds Sandstone

Clematis Group

~\

Evergreen Formation

895 __________ MoolayemberFm

_________________ 890

83- R305 -4~----------~

_'V'!:..~t~rr::...e_ ~_n.:t~~~~~ _]

- -- . - Maximum flooding surface Sequence boundaries ("i1"'('1'1 Major unconformities - - Other boundaries ? Correfation between columns uncertain

~

BOWEN BASIN

80-p11.1._-'rr 83->'229

basement

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Sequence stratigraphic interpretation by A.T. Wells, A.T. Brakel & J.M. Totterdell Fault interpretation by R.J. Korsch & J.M. Totterdell Digttising of sections and contour generation by M.G. Nicoll using Petroseis TJI software Minor manual editing of the contours by R.J. Korsch & M.G. Nicoll This is a provisional map, subject to change Map plotted: June 1994

DRso-o 9l,

.,..,. \

DR90-E.

This map accompanies a text publication: Wells, A.T., Brakel, A.T., Totterdell, J.M., Korsch, R.J., & Nicoll, M.G:, 1994. Sequence stratigraphic interpretation of seismic data north of 26'S, Bowen and Surat Basins, Queensland. Australian Geological Survey Organisation. Record 1993151.

25 00 DOS

The digital data for this map were compiled using Petroseis"" software and may be suitable for transter to other digital systems. Information on formats, release conditions, and costs can be obtained from: AGSO Sales Centre GPO Box 378, Canberra ACT 2601 PH (06) 249 951 9 FAX (06) 249 9982

+

+

Emerald

Duaringa

Rockhampton

QLD. W.A.

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CB1-T-38 €.~

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AGSO

BOWEN BASIN NORTH OF 26°S, QUEENSLAND 2. STRUCTURE CONTOUR MAP OF B30/B31 REFLECTOR IN TWO-WAY TIME (BASE OF BUFFEUCATTLE CREEK FORMATIONS) 23 30

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Clematis Group

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25 00 DOS

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This map accompanies a texl publication: Wells, A.T., Brakel, A.T., Totterdell, J.M., Korsch, RJ., & Nicoll, M.G., 1994. Sequence stratigraphic interpretation of seismic data north of 26°5, Bowen and Surat BaSins, Queensland. Australian Geological Survey OrganisatIon, Record 1993/51. The digital data for this map were compiled using Petroseis"" sottware and may be suitable for transfer to other dig"al systems. Information on formats, release conditions, and costs can be obtained from: AG50 Sales Centre GPO Bo. 378, Canberra ACT 2601 PH (06) 249 95t9 FAX (06) 249 9982

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This work is copyright. Apart from any fair dealings for the purposes of study, research, criticism or review, as permitted under the Copyright Act, no part may be reproduced by any process without written permiSSion. Copyright is the responsibil"y 01 the Executive Director, Australian Geological Survey Organisation. Inquiries should be directed to the Principal Information Officer, Auslralian Geoiogical Survey Organisation, GPO Box 378, Canberra ACT 2601.

150 30 OOE The Commonwealth does not warrant that this map is defin"ive, nor free of error and does not accept liability for any loss caused or arising from reliance upon information provided herein.

AGSO

BOWEN BASIN NORTH OF 26°S, QUEENSLAND 3. STRUCTURE C()NTOUR MAP OF B40 REFLECTOR IN TWO-WAY TIME (BASE OF ALDEBARAN SANDSTONE) 23 30

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Rewan Group

- - - - - - - - - - - - - - - - - - --- 870 - - - - - - ___________ _ Bandanna Formation

+

Baralaba Coal Measures

-

865

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Sequence stratigraphic interpretation by A.T. Wells, A.T. Brakel & J.M. Totterdell Fault interpretation by R.J. Korsch & J.M. Totterdell Digitising 01 sections and contour generation by M.G. Nicoll using Petroseis'" software Grid size 1000 metres Minor manual editing 01 the contours by RJ. Korsch & M.G. Nicoll This is a provisional map, subject to change Map plotted: June 1994

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This map accompanies a text publication: Wells, A.T., Brakel, A.T., Totterdell, J.M., Korsch, R.J., & Nicoll, M.G., 1994. Sequence stratigraphic interpretation of seismic data north of 26'S, Bowen and Surat Basins, aueensland. Australian Geological Survey Organisation, Record 1993151.

--1 I

900---:

The digital data for this map were compiled using Petroseis'" software and may be suitable for transfer to other digitat systems. Information on formats, release conditions, and costs can be obtained from: AGSO Sales Centre GPO Box 378, Canberra ACT 2601 PH (06) 249 9519 FAX (06) 249 9982

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This work is copyright. Apart from any fair deaUngs for the purposes 01 study, research, criticism or review, as permitted under the Copyright Act, no part may be reproduced by any process without wriHen permission. Copyright is the responsibility of the Executive Director, Australian Geological Survey Organisation. Inquiries should be directed to the Principal Information Officer, Australian Geologicat Survey Organisation, GPO Box 378, Canberra ACT 2601. The Commonwealth does not warrant that this map is delinitive, nor free of error and does not accept liability for any loss caused or arising from reliance upon information provided herein.

AGSO

BOWEN BASIN NORTH OF 26°S, QUEENSLAND 4. STRUCTURE CONTOUR MAP OF B45 REFLECTOR IN TWO-WAY TIME (INTRA-ALDEBARAN SANDSTONE UNCONFORMITY) 23 30

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7B3O------------------

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Oldrack Formation

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(f'Y'('1'1 Major unconformities

-- -. - Maximum flooding surface _ _ Other boundaries

Co"efation between columns uncertain

Sequence stratigraphic interpretation by A.T. Wells, A.T. Brakel & J.M. Totterdell Fault interpretation by R.J. Korsch & J.M. Totterdell Digitising of sections and contour generation by M.G. Nicoll using Petroseis'" software Grid size 1000 metres Minor manual editing of the contours by R.J. Korsch & M.G. Nicoll This is a provisional map, subject to change Map plotted: June 1994

Ou

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Bartield Formation

7

Aldebaran

0


8araJaba Coal Measures

Z B65 --;:;::::::;:-;:==-::---Black Alley Shale Gyranda Formation ,. 861 - - - - - - - - - - - - - - - - - 7 B60 - - - - - - - - - - - - - - ---_ c(

+

+

+

This map accompanies a text publication: Wells, A.T., Brakel, A.T., Totterdell, J.M., Korsch, R.J., & Nicoll, M.G., 1994. Sequence stratigraphic interpretation of seismic data north of 26'S, Bowen and Surat Basins, Queensland. Australian Ge%gjca/ Survey OrganjsaUon, Record 1993/51. The digital data for this map were compiled using Petroseis'" software and may be suitable for transfer to other digital systems. Information on formats, release conditions, and costs can be obtained from: AGSO Sales Centre GPO Box 378, Canberra ACT 2601 PH (06) 249 9519 FAX (06) 249 9982

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© Commonwealth of Australia 1994

\ II 26 00 ODS 147 30 ODE

148 00 ODE

148 30 ODE

I I 149 00 DOE

149 30 DOE

150 00 ODE

150 30 ODE

This work is copyright. Apart from any fair dealings for the purposes of study, research, criticism or reView, as permitted under the Copyright Act, no part may be reproduced by any process without written permission. Copyright is the responsibility of the Executive Director, Australian Geological Survey Organisation. Inquiries should be directed to the Principal Information Officer, Australian Geological Survey Organisation, GPO Box 37B, Canberra ACT 2601 . The Commonwealth does not warrant that this map is definitive, nor free 01 error and does not accept liability for any loss caused or arising Irom reliance upon information provided herein.

AGSO

BOWEN BASIN NORTH OF 26°S, QUEENSLAND S. STRUCTURE CONTOUR MAP OF BSO REFLECTOR IN TWO-WAY TIME (BASE OF FREITAG FORMATION) 23 30

OOSr-------------------------",--.--,-.-~--~~----~--_r_,~r_~_r--~--------J'--~--Jr~~~~~~--------~-----------------y---------------------y--------------------------------------------,

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Injune Creek Group

Hunon Sandstone

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895

__________ MooJayemberFm

- - - - - - - - - - - - - - - - - BOO __ __ _ _ _ _ _ _ _______ _ Showgrounds Sandstone 8 8 5 - - - - - - - - - - --Clematis Gp

Clematis Group

.---------- - - - - - - Rewan Group

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875--------------

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Baralaba Coaf Measures

Bandanna Formation

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+

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f5 Peawaddy Formation . Flat Top Formation a... 856 ·- - - - - - - - - - - - - - - - - 1855----------- - - - - _ _ _ w Ingelara Formation Barfield Formalion ....

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This map accompanies a text publication: Wells. A.T., Brakel, A.T., Totterdetl, J.M_, Korsch, R.J., & Nicotl. M.G" 1994. Sequence stratigraphic interpretation of seismic data north of 26'S, Bowen and Surat Basins, Queensland. Australian Geological Survey Organisation, Record 1993151.

'\, %v

- - --_ Maximum floodingsurfac~ ___ Other boundan'es

Sequence stratigraphic interpretation by A.T. Wells, A.T. Brakel & J.M. Totterdell Fault interpretation by RJ. Korsch & J.M. TotterdeU Digitising of sections and contour generation by M.G. Nicotl using Petroseis'" software Grid size 1000 metres Minor manual editing of the contours by RJ. Korsch & M.G. Nicotl This is a provisional map, subject to change Map plotted: June 1994

0 0

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ONSHORE SEDIMENTARY & PETROLEUM GEOLOGY PROGRAM AGSO PROJECT 112.05: SEDIMENTARY BASINS OF EASTERN AUSTRALIA

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This work is copyright Apart from any fair dealings for the purposes of study. research. criticism or review, as permitted under the Copyright Act, no part may be reproduced by any process without written permission. Copyright is the responsibility of the Executive Director, Australian Geological Survey Organisation. Inquiries should be directed to the Principal Information Officer, Austratlan Geological Survey Organisation, GPO Box 378, Canberra ACT 2601. The Commonweatth does not warrant that this map is definitive, nor free of error and does not accept liability for any loss caused or arising from reliance upon information provided herein.

AGSO

BOWEN BASIN NORTH OF 26°S, QUEENSLAND 6. STRUCTURE CONTOUH MAP OF B55/B56 REFLECTOR IN TWO-WAY TIME (BASE OF FLAT TOP/PEAWADDY FORMATIONS) 23 30 OOS

AUSTRALIAN GECLOGlCAL SURVEY ORCANISATION

1:500000

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Contour interval

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LEGEND

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Structure contour (ms) Fault Subsurface limit of horizon Inferred subsurface limit of horizon

---600---

•••• 0 . . . . . . . . . . ••••••••••• • •• •

DENISON TROUGH

w

0

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Injune Creek Group

b. 0

Injune Creek Group

U

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iii

Hutton Sandstone


Hutton Sandstone

< a;

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---_._---_._----_.

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S25

Evergreen Formation

(I)

0

'"

I

\

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0

~

Q-

\i\

. - - - - - - - - - - - - - - - - - 880 -- ~ ------_-- _____ _ 675-------------· Rewan Group

z '" 3i

~

ffi

Bandanna Formation

Black Alley Shale

a

Gyranda Formation

861 - - - - - - - - - - - - - - - - - 7 86() - - - - - - - - - - - - - - - - - Peawaddy Formation

Rat Top Formation

.. 656- - - - - - - - - - - - - - - - - ? 855 - - - - - - - - - - - ______ _ w Ingelara Formation Barfield Formation ~ ?

:5 MO-----------------1 Freitag Formation Aldebaran

.

Sandstone

?rmrmmrmrmmm Oldrack Formation

z&W---------------------7

:!

Cattle Creek Formation

:; 6 3 1 - - - - - - - - - - - - - - - - -

0

0 I!l

ffi

Reids Dome

~

basement

Buffel Formation

7B30--- - - - - - - - - - - - - - - _ Camboon Volcanics

.. 825 - - - - - - - - - - - - - - - - ~ 815 beds

'"

Sequence boundaries

cpo

-. -. -

Maximum flooding surface

("f'YY't1 Major unconformities ?

Ii

/ ~

+

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0

~

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.. 8

~

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1lI 0

0

0 0

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0 0

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0

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- - Other boundaries Correlation between cc/umns uncertEJin

Sequence stratigraphic interpretation by A.T. Wells, A.T. Brakel & J.M. Totterdell Faun interpretation by R.J. Korsch & J.M. Totterdell Oigitising of sections and contour generation by M.G. Nicoll using Petroseis™ software G rid size 1000 metres Minor manual editing of the contours by RJ. Korsch & M.G. Nicoll This is a provisional map, subject to change Map plotted: June 1994

I\J

25 00 OOS

Baralaba Coal Measures

865

-845----------- - - - - - - ?

~0

I /

Rewan Group

870 _________________ _

OJ

a

Showgrounds Sandstone B85 - - - - - - - - - - - - Clematis Gp

Clematis Group

0'"'" ~

0

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~1"Y'('M' 895 - - ___ __ ___ MoolayembarFm

- - - - - - - - - - - - - - - - - 800 - - _______________ _

'6~g 0 0 oru 01')

S10

_______ __ Moolayember Fm

ru

8CD

S20

Precipice Sandstone

-,

Westgrove Ironstone Mbr ] ----_._-_._._._-_. Evergreen Formation

.

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00129S3Lo-0-O-E----------------------------~14~8~0~0~0~D~E------------------li:r:1--~1~4~8~3~0-0~0~E~----~---------=:1----L---~1~4~9~0~0~0~O~EL-------~-L1-1-LJJLlJJLi1~~14~9~3~0~0~oEbJ-1-1--~------~~~~~1l11~5~oiO~0~0~0~E~~

150 30 OOE

The Commonwealth does not warrant that this map is definitive, nor free of error and does not accept liability for any loss caused or arising from reliance upon information provided herein.

AGSO

BOWEN BASIN NORTH OF 26°S, QUEENSLAND 7. STRUCTURE CONTOUR MAP OF B60/B61 REFLECTOR IN TWO-WAY TIME (BASE OF GYRANDA FORMATION/BLACK ALLEY SHALE) 2330

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Injune Creek: Group

9


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~ a:

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520

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S 10 ffll"t'Y'M'mrl'f"'YY'1"YrMrI'f"'YYM" ________ .Moolayember Fm

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_________________ BOO _____________ ____ _ Showgrounds Sandstone Clematis Group Bas - - - - - - - - - - - - Clematis Gp . _________________ 800 - - - - - - - - - - - - - - - - - -

875-------------·

Rewan Group

Rewan Group - - - - - - - - - - - - - - - - - . 870 - - - - - _____ _ ____ __ _ Bandarna Formation Baralaba Coal Measures

+

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- - - - Sequence boundaries

~

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Sequence stratigraphic interpretation by A.T. Wells, A.T. Brakel & J.M. Totterdell Fault interpretation by R.J. Korsch & J.M. Totterdell Digitising 01 sections and contour generation by M.G. Nicoll using Petroseis TAl software Grid size 1000 metres Minor manual editing of the contours by R.J. Korsch & M.G. Nicoll This is a provisional map, subject to change Map plotted: June 1994

#

0 0

-. -. - Maximum flooding surface _ _ Other boundaries

0 0

This map accompanies a text publication: Wells. A.T., Brakel, A.T., Totterdell, J.M., Korsch, R.J., & Nicoll, M.G., 1994. Sequence stratigraphic interpretation 01 seismic data north of 26'S, Bowen and Surat Basins, Queensland. Australian Geological Survey Organisation. Record 1993/51.

~

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The digital data lor this map were compiled using Petroseis TW software and may be suitable lor transler to other digital systems. Information on formats, release condttions, and costs can be obtained from: AGSO Sales Centre GPO Box 378, Canberra ACT 2601 PH (06) 249 9519 FAX (06) 249 9982

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© Commonwealth of Australia 1994 This work is copyright. Apart lrom any fair dealings for the purposes of study, research. criticism or review. as permitted under the Copyright Act, no part may be reproduced by any process without written permiSSion. Copyright is the responsibility 01 the Executive Director, Australian Geological Survey Organisation. Inquiries should be directed to the Principal Information Officer, Australian Geological Survey Organisation, GPO Box 378, Canberra ACT 2601.

150 30 DOE

The Commonwealth does not warrant that this map is definitive, nor free of error and does not accept liability lor any loss caused or arising Irom reliance upon inlormation provided herein.

AGSO

BOWEN BASIN NORTH OF 26°S, QUEENSLAND 8. STRUCTURE CONTOUR MAP OF B65 REFLECTOR IN TWO-WAY TIME (BASE OF BARALABA COAL MEASURES/BANDANNA FORMl,TION) 23 30

OOSr-----------------------~------------·----~~C_~~~r_~~--------------------r_~~~~~\\~~~-----.-----------,.-------------------.---------------------------------------~

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100 milliseconds

LEGEND

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Structure contour (ms) Fault Subsurface limit of horizon Inferred subsurface limit of horizon

- - - - - 800 - - - -

..............................

DENISON TROUGH

TAROOM TROUGH

lnjune Creek Group

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HuRon Sandstone

-_._._-_._-----_ ..

[ Westgrove Ironstone Mor

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530 S25 520 510

"iii

======:::;-Hunan Sandstone

Wesigrove Ironstone Mbr

_. _. E~;rg~~; F;nMiion

]

Precipice Sandstone

________ . Moolayember Fm

B95

_____ __ __ _ Mootayember Fm

- - - - --- - - - - -- - - - -

BOO - - _______________ _

Showgrounds Sandstone Clematis Group BaS - - - - - - - - - - - - Clematis Gp . - - - - - - - - - - _______ 880 - - - - - - - - - ________ _ 875-------------· Rewan Group Rewan Group

U)

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- - - - - - - - - - - - - - - - - - -- - --.e?Q----=-=--==...:::::;; _ .;;:-~___ =-:.=' Bandanna Formation Baralaba Coal Measures

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865 -Gyranda Formation ~ 860 - - - - - - - - - - - - - - - - -Flat Top Fonnation D.. 856-- - - - - - - - - - - - - - - - - '? 855 - - - - - - - - _________ _ ~ Ingelara Formation Barfield Formation Black Alley Shale


,,861 -----------------7 ffi Peawaddy Formation

24 30 OOS

~


g 0

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Freitag Formation 8~-------- - --------7

7

Oxtrack Formation

Aldebaran

-845----------------- ? Sandstone

3

840--------------1 Cattle Creek Formation

,.ffi 831----------------Reids Dome

~8a----------------,. 8 beds ..J 15

a:

Buffel Formation

?8~-----------------Camboan Volcanics

basement

~

Sequence boundades

-. -. - Maximum flooding surface - - - Other boundades Correlation ootwetln columns uncertain

(-:"l'Y'f'l Major unconformities ?

~

I 25 00 OOS

Sequence stratigraphic intelPretation by A.T. Wells, A.T. Brakel & J.M. Totterdell Fault intelPretation by RJ. Korsch & J.M. Totterdell Digitising of sections and contour generation by M.G. Nicoll using Petroseis'" software Grid size 1 000 metres Minor manual editing of the contours by R.J. Korsch & M.G. Nicoll This is a provisional map, subject to change Map plotted: June 1994

rt?0

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This map accompanies a text publication: Wells, A.T., Brakel, A.T., Totterdell, J.M., Korsch, R.J., & Nicoll, M.G., 1994. Sequence stratigraphic intelPretation of seismic data north of 26'S. Bowen and Surat Basins, Queensland. Australian Geological Survey Organisation, Record 1993151. The dig~al data for this map were compiled using Petroseis 1M software and may be suitable for transfer to other digital systems. Information on formats, release conditions, and costs can be obtained from: AGSO Sales Cenlre GPO Box 37B, Canberra ACT 2601 PH (06) 249 9519 FAX (06) 249 9982

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ONSHORE SEDIMENTARY & PETROLEUM GEOLOGY PROGRAM AGSO PROJECT 112.05: SEDIMENTARY BASINS OF EASTERN AUSTRALIA

NGMA PRODUCT OF THE NATIONAL GEOSCIENCE MAPPING ACCORD

© Commonwealth of Australia 1994 This work is copyright. Apart from any fair dealings for the pUlPoses of study. research. cr~icism or review. as permitted under the Copyright Act, no part may be reproduced by any process without written permission. Copyright is the responsibility of the Executive Director, Australian Geological Survey Organisation. Inquiries should be directed to the Principal Information Officer, Australian Geolog ical Survey Organisation, GPO Box 378, Canberra ACT 2601. The Commonwealth does not warrant that this map is definitive, nor free of error and does not accept liability for any loss caused or arising from reliance upon information provided herein.

AGSO

BOWEN BASIN NORTH OF 26°S, QUEENSLAND 9. STRUCTURE CONTOUR MAP OF B70 REFLECTOR IN TWO-WAY TIME (BASE OF REWAN GROUP) 23 30

J, AUSTRALIA ,'" ////({'.!.-" / / / / / ~,\., .......

OOSr---------------------------~--------------::--------~~_r--r_lI--~~------------------------_r~~~~~J\~~~~=\------------------~~--------------------~C_-----------------------------------------------,

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Contour interval

100 milliseconds

LEGEND 24 00 DOS

Structure contour (ms) Fault Subsurface limit of horizon Inferred subsurface limit of horizon

- - - - - 800 - - - -

0----'

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u

Injune Creek Group

.., c;;

•

TAROOM TROUGH

Injune Creek Group

a:

[~.:~t~~~. ~.n~t~~~ ~~~..

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=====::;--Hutton Sandstone

Hutton Sandstone

If)

S30

525

Evergreen Formation

-~=~--=-=---- S20

Westgrove Ironstone Mbr ] _. - - E~ergreen i=o~ii;~

Precipice Sandstone Precipice Sandstone -----,.)1'1"('1"l'i'~ 510 ______ _ __ MoolayemberFm 895 _ _________ MooIayemberFm

- - - - - - - - - - - - - - - - - 890

_________________ _ Showgrounds Sandstone

Clematis Group

. _________________ BBO - - - - - - - - - - - - - - - - - 875-------------· Rewan Group Rewan Group ~ - - - - - - - - - - - - - - - - - - - - - . 870 - - - - - ____________ _ Bandanna Formation Baralaba Coal Measures Z 865 -~:...:::=.:..:::...:::===---<[ Black Alley Shale Gyranda Formation :i 861 - - - - - - - - - - - - - - - - - 1 860 - - - - - - - - - - - - - - - - - Peawaddy Fonnation Flat Top Formation 8 5 6 - - - - - - - - - - - - - - - - - 1655 - - - - - - - - - - - - - - - - - w Ingelara Formation Barfield Fonnation .. ? ~ Freitag Formation 650----------------- ? 1 N"l'Y'<';;::;:':;;;:'w:;;';;:M;;~"N"W'M'V Aldebaran -645- - - - - - - - - - - - - - - - - ?

+

24 30 005

BSS - - - - --------Clematis Gp

ffi

0.

Sandstone

?

Z 840 ~

Canle Creek Fonnation

Buffel i=onnation

::;; 6al----------------- ?830---- - - - - - - - - - - - - - -

ffi

Re ids Dome

0.8~----------------> beds

Gamboon Volcanics

it. 615~i'lvrrfyflv)''('fyY'f1 basement

C(

w

-. - - _ Maximum flooding surface - - - - Sequence boundaries Major unconformities - - Other boundaries ? Correlation between columns uncertain

r"t't'Y'1"1

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0

The digital data for this map were compiled using Petroseis'" software and may be suitable for transfer to other digital systems. Information on formats, release conditions, and costs can be obtained from: AGSO Sales Centre GPO Box 378, Canberra ACT 2601 PH (06) 249 9519 FAX (06) 249 9982

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© Commonwealth of Australia 1994 This work is copyright. Apart from any fair dealings for the purposes of study, research, criticism or review, as permitted under the Copyright Act, no part may be reproduced by any process without written permission. Copyright is the responsibility of the Executive Director. Australian Geological Survey Organisation. Inquiries should be directed to the Principal tnformation Officer, Australian Geological Survey Or gan isation, GPO Box 378, Canberra ACT 2601. The Commonwealth does not warrant that this map is definitive, nor free of error and does not accept liability for any loss caused or ariSing from reliance upon information provided herein.

AGSO

BOWEN BASIN NORTH OF 26°8, QUEENSLAND 10. STRUCTURE CONTOUR MAP OF 875 REFLECTOR IN TWO·-WAY TIME (INTRA-REWAN GROUP) 23 30 OOSr-------------------------. .----------------------------------------------------------------------~--------~----------------~--------------------~-------------------------------------------__,

AUSTRALIAN GECLOGICAL SURVEY ORGANISATION .,

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Contour interval

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LEGEND

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24 00 DOS

Structure contour (ms) Fault Subsurface limit of horizon Inferred subsurface limit of horizon

----600--

- -- - --- --- ---

..............................

DENISON TROUGH

TAROOM TROUGH

Injune Creek Group

g

Injune Creek Group

'"'"

Hutton Sandstone

-.:::>

[ Westgrove Ironstone Mbr

< II:

- - - - - _ . _ - - __ 0

=.=======:::;--Hutton Sandstona

_ _ _ 0.

Evergreen Formation Precipice Sandstone

S30 S25

_"!:..~t?!.~'!:. ~o.n~t~~~ ~~~.J Evergreen Formation

S20

Precipice Sandstone

--r'('1vl"['1v)"j'1'1''('1v)''('1'')l1v)lt')lf'J S 10 n 'i"Y'('1"t')"1"t'Y'1''1'Y1''l'Y'1'TI'1'rl''M' ___ __ _ ___ Moolayember Fm

o

B95 __________ Moo!ayember Fm

----------------- BOO --- ______________ _

iii

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Clematis Group

a:

~>-

Showgrounds Sandstone 885 - - - - - - - - - - - - Clematis Gp

. - - - - - - - - - - - - - - - - - B80

Rewan Group

------------------

875-------------· Rewan Group

- - - - - - - - - - - - - - - - - - 670 - - - - - - - - - - - - - - - __ _ Bandanna Formation

z

Black Alley Sha le Gyranda Formation :; 861 - - - - - - - - - - - . - - - - - - 7 960 - - - - - - - - - - - - - - - - - a: Peawaddy FormatIOn Flat Top Formation ~ 856 -- - - - - - - - - - - - - - - - - ? 8 5 5 - - - - - - - - - - - - - - - - - w Ingelara Formation Barfield Formation >1 ~ Freitag Formation Oxtrack Formation 950 - - - - - - - - - - - - - - - - - 1 ? !'t1I'Y'1VYY~"ff-i'0m"M'Y'1'1"Y''M'Y Aldebaran <:

24 30 ODS

-

Baralaba Coal Measures

965 --::--:-::---:-~~--

B45--- - - - - - - - - - - - - - - 7 Sandstone

z~0---------------------1

:g; Cattle Creek Formation ::!i 831 ________________ _

ffi

Reids Dome

~

basement

"- 825 - - - - - - - - - - - - - - - - ~ 615 beds

Buffet Formation 1830------- - - - - - - - - - - Camboan Volcanics

,

_. _. _ Maximum nooding surface - - - Other boundaries Correlation between columns uncertain Sequence boundaries

('f'Y'('1'1 Major unconformities

?

Sequence stratigraphic interpretation by AT. Wells, A.T. Brakel & J.M. Totterdell Faull interpretation by R.J. Korsch & J.M. Totterdell Digitising of sections and contour generation by M.G. Nicoll using Petroseis'" software Grid size 1000 metres Minor manual editing of the contours by R.J. Korsch & M.G. Nicoll This is a provisional map, subject to change Mep plotted: June 1994

25 00 ODS

+

+

+

This map accompanies a text publication: Wells, A.T., Brakel, A.T., Totterdell, J.M" Korsch, R.J_, & Nicoll, M.G .. 1994. Sequence stratigraphie interpretation of seismic data north of 26'S, Bowen and Surat Basins, Queensland. Australian Geological Survey Organisation, Record 1993/51. The digital data for this map were compiled using Petroseis'" software and may be suitable for transfer to other digital systems. Infonnation on fonnalS, release conditions, and costs can be obtained from: AGSO Sales Centre GPO Box 378, Canberra ACT 2601 PH (06) 249 9519 FAX (06) 249 9982

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NGMA PRODUCT OF THE NATIONAL GEOSCIENCE MAPPING ACCORD

© Commonwealth of Australia 1994

\ o

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& 26 00 DOS

147 30 DOE

148 00 DOE

148 30 ODE

149 00 ODE

149 30 DOE

150 00 ODE

150 30 DOE

This work is copyright Apart from any fair dealings for the purposes of study, research, criticism or review, as pennitted under the Copyright Act, no part may be reproduced by any process without written permission. Copyright is the responsibility of the Executive Director, Australian Geological Survey Organisation. Inquiries should be directed to the Principal Information Officer, Austrafian Geological Survey Organisation, GPO Box 378, Canberra ACT 2601. The Commonwealth does not warrant that this map is definitive, nor free of error and does not accept liability for any loss caused or arising from reliance upon infonnation provided herein.

AGSO

BOWEN BASIN NORTH OF 26°S, QUEENSLAND 11. STRUCTURE CONTOUR MAP OF B80 REFLECTOR IN TWO-WAY TIME (BASE OF CLEMATIS GROUP) 23 30

OOS~------------------------"----~--------'---------------------------------------------------------Y--------~----------------~---------------------.~------------------------------------------,

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Contour interval

100 milliseconds

LEGEND

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Structure contour (ms) Fault Subsurface limit of horizon Inferred subsurface limit of horizon

-----800--

DENISON TROUGH

TAROOM TROUGH

Injune Creek Group

o in

.,

lnjune Creek Group

Hutton Sandstone

c a:

Hutton Sandstone

~~t~~~. ~o_n~t~ ~~~ . .

::>

-.

[ E....ergreen Formation

830 Westgrove Ironstone Mbr

S25

-- ------_._._-_._-

]

Evergreen Formation

S20

Precipice Sandstone --,"""Y'M""'M"r"""''M''I'M¥-!"\'V'-M

- - - - - - - - - MooiayemberFm - - - - - - - - - - - - - - ___

Precipice Sandstone S10 r',(,!"I'Y'M',(,!"t''('!''l''('M')''f''Y('1'r('M' 895 __________ Moolayember Fm B~

______________ ___ _

Showgrounds Sandstone

Bas ------------Clemati5 Gp

Clematis Group

. - - - - - - - - - - - - - - - - - B80 - - - - - - - - - - - - - - - - - _

B75-------------·

Rewan Group

Rewan Group

- - - - - - - - - - - - - - - - - - - . 870 _________________ _ Baralaba Coal Measures Bandanna Formation

B65 Black Alley Shale Gyranda Formation B61 - - - - - - - - - - - - - - - - -1 B60 - - - - - - - - - - - - - - - - - Peawaddy Formation Flat Top Formation 0.. B56 - - - - - - - - - - - - - - - - - ? 8 5 5 - - - - - - - - - - - - - - ___ _ w Ingelara Formation Barfield Formation

+

24 30 OOS

--=-===:.::.:::::.:===---

z00( :Ii

ffi ~

:5

Freitag Formation B~-----------------? Aldebaran -B45----------------- ?

z

Sandstone

?rmmrrmmmnl1llT Oxtrack Formation

?

840

:!

Cattle Creek Formation

:; B31 - - - - - - - - - - - - - - - - Reids Dome

0-----

?

ffi

Buffel Formation

1B30-----------------Camboon Volcanics

~B~----------------:> beds

~B15~~ basement

<

...

- - - ~

7

Sequence boundaries Major unconformities

___ . _ Maximum ffooding surface ___ Other boundaries

Correlation between columns uncertain

Sequence stratigraphic interpretation by A.T. Wells, AT. Brakel & J.M. Totterdell Fault interpretation by R.J . Korsch & J.M. Totterdell Digitising of sections and contour generation by M.G. Nicoll using Petroseis '" software Grid size 1000 metres Minor manual editing of the contours by R.J. Korsch & M.G. Nicoll This is a provisional map, subjecl 10 change Map plotted: June 1994

+

25 00 ODS

This map accompanies a text publication: Wells, AT., Brakel, AT., Totterdell, J.M., Korsch, R.J., & Nicoll, M.G .. 1994. Sequence stratigraphic interpretation of seismic dala north of 26"8, Bowen and Surat Basins, Queensland. Australian Geological Survey Organisation, Record 1993151 . The digital data for this map were compiled using Petroseis TAl software and may be suitable for transfer to other digital systems. Information on formats, release conditions, and costs can be obtained from: AGSO Sales Centre GPO Box 378, Canberra ACT 2601 PH (06) 249 9519 FAX (06) 249 9982

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ODE

This work is copyright. Apart from any fair dealings for the purposes of study, research, criticism or review, as permitted under the Copyright Act, no part may be reproduced by any process without written permission. Copyright is the responsibility of the Executive Director, Australian Geological Survey Organisation. Inquiries should be directed to the Principal Information Officer, Australian Geological Survey Organisation, GPO Box 378, Canberra ACT 2601. The Commonwealth does not warrant that this map is definitive, nor free of error and does not accept liability for any loss caused or arising from reliance upon information provided herein.

AGSO

BOWEN BASIN NORTH OF 26°8, QUEENSLAND 12. STRUCTURE CONTOUR MAP C)F B85 REFLECTOR IN TWO-WAY TIME (INTRA-CLEMATIS GROUP/BASE OF SHOWGROUNDS SANDSTONE) 23 30

oosr-------------------------~--------------·--------------------------------------------------------~~------1r----------------~--------------------~------------------------------------- -----~

AUSTRALIAN GEcx.oGlCAL SURVEY ORGANISATION

1:500000 20 I

30

40

50

I

I

I

KILOMETRES UNIVERSAL TRANSVERSE MERCATOR PROIECTIOJll AUSTRALIAN NA nONAL SPHEROID

CENTRAL MERlDlAN 1470000&

Contour interval

100 milliseconds

LEGEND

+

+

24 00 DOS

Structure contour (ms) Fault Subsurface limit of horizon Inferred subsurface limit of horizon

---800---

DENISON TROUGH

T AROOM TROUGH Injune Creek Group

Injune Creek Group 0

Cii

Hutton Sandstone

Hutton Sandstone

~

$30

0:

[ Westgrove Ironstone Mbr

:>

-.

Westgrove Ironstone Mbr

----- --------- --_. Evergreen Formation

S25

-- ---------- ----Evergreen Formation

520

Precipice Sandstone

Precipice Sandstone

510

_________ Moolayember Fm

]

B95 __________ Moolayember Fm

_________________ 890 _________________ _ Showgrounds Sandstone BB5------------Clematis Gp ~

Clematis Group

. _________________ 880 - - - - - - - - - - - - - - - - - 875-------------· Rewan Group

Rewan Group

- - - - - - - - - - - - - - - - - . 870 - - - - - - - - - - - - - - ___ _

---========-----

--B&R~~ --- --··-._a8Jillaba-GoaJ_.MeastJres----·. ~"'"'"

24 30 OOS

+

+

+

865 Black Alley Shale Gyranda Formation - 861 - - - - - - - - - - - - - - - - -1 860 - - - - - - - - - - - - - - - - - -

~

~

Peawaddy Formation Rat Top Formation ~ 856 -- - - - - - - - - - - - - - - - - ? 855-----------------w Ingelara Formation Barfield Formation

:5~ 8W-----------------? Freitag Formation Aldebaran

-845----------------- 7

z =!

Sandstone

Cattle Creek Formation

ffi

~

o

?rmrrrrmmmmmn Oxtrack Formation

1

640

::E 8 3 1 - - - - - - - - - - - - - - - - Reids Dome D. 825 - - - - - - - - - - - - - - - - ~ 815 beds

Iil

?

Buffel Formation

?830-----------------Camboon Volcanics

basement

w

J"i'1"'i"1'1 ?

Sequence boundaries Major unconformities

___ . _ Maximum ffooding surlace _ _ Other boundaries

Correlation between columns uncertain

Sequence stratigraphic interpretation by A.T. Wells. A.T. Brakel & J.M. Totterdell Fault interpretation by RJ. Korsch & J.M. Totterdell Digitising of sections and contour generation by M.G. Nicoll using Petroseis TA' software Grid size 1000 metres Minor manual editing of the contours by RJ. Korsch & M.G. Nicoll This is a provisional map, subject to change Map plotted: June 1994

25 00 OOS

+

+

+

This map accompanies a te>
Emerald

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AGSO PROJECT 112.05: SEDIMENTARY BASINS OF EASTERN AUSTRALIA

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PRODUCT OF THE NATIONAL GEOSCIENCE MAPPING ACCORD

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© Commonwealth of Australia 1994

\ _ _ 5 00

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26

001~fS3~O~O~O~E;---------------------------11~48~0~0){O~0~E~----------------~--~L---~144F8~3~OIOOOOE~----------------~--------1144q910~0){0~0~E~-----L~----J---L--L-L~~1~4~9~3~0~0~0~E=--L--~--~--1-1-1-~--~~~1~50~O~O~O~O~E~~~------------------------~

This work is copyright. Apart from any fair dealings for the purposes of study, research, criticism or review, as permitted under the Copyright Act, no part may be reproduced by any process without written permission. Copyright is the responsibility of the Executive Director, Australian Geological Survey Organisation. Inquiries should be directed to the Principal Information Officer, Australian Geological Survey Organisation, GPO Box 378, Canberra ACT 2601.

150 30 ODE The Commonwealth does not warrant that this map is definitive, nor free of error and does not accept liability for any loss caused or arising from reliance upon information provided herein.

AGSO

BOWEN BASIN NORTH OF 26°S, QUEENSLAND 13. STRUCTURE CONTOUR MAP OF B90 REFLECTOR IN TWO-WAY TIME (BASE OF MOOLAYEMBER FORMATION) 23 30

ooSr-------------------------~._------------------------------------------------------------------------~~------_y------------------'\----------------------~--------------------------------------------.

J, AUSTRALIA I'"

-j""",. ,'//////'.!..: ....

AUSTRALIAN GECLOGlCALSURVEY

.,~//// ~""

ORGANI$ ATION

1:500 000 20

30

I

I

40 I

50 I

KILOMETRES UNIVERSAL TRANSVERSE MERCATOR PROJECTION AUSTRALIAN NATIONAL SPHEROID CENTRAL MERIDIAN 14700 OOB

Contour interval 100 milliseconds LEGEND

+

24 00 005

+

Structure contour (ms) Fault Subsurface limit of horizon Inferred subsurface' limit of horizon

- - - - - BOO - - - -

DENISON TROUGH

TAROOM TROUGH

Injune Creek Group

9

. In In

Injune Creek Group

Hunon Sandstone

Hutton Sandstone

530

II:

:>

[ Westgrove Ironstone Mbr

-.

._------- -- ------- 525

Evergreen Formation

Westgrove Ironstone Mbr ]

-----------------Evergreen Formation

520

Precipice Sandstone

Precipice Sandstone

. '~~

510

_________ Moolayember Fm

895 - _________ Moolayember Fm

- - - - - - - - - - - - - - - - - 800

~~ __________ __ _ __ _ _ _ Showg rounds Sandstone

Clematis Group

885------------Clematis Gp

. - - - - - - - - - - - - - - - - - 880 - - - - - - - - - - - - - - - __ _ 875-------------· Rewan Group

Rewan Group

- -- - - - - - - - - - - - - - - - - - . 870 __________ _____ _ _ _ Bandanna Formation

+

+

+

24 30 005

Baralaba Coal Measures

z 86S C 81ack Alley Shale Gyranda Formation !ii 861 - - - - - - - - - - - - - ----1 860 - - - - - - - - - - - - - - - - - -

ffi

Peawaddy Formation

Rat Top Formation

c... 856 - - - - - - - - - - - - - - - - - 1 8 5 5 - - - - - - - - - - - - - - - - _ _

~

Ingelara Formation

~

Freitag Formation

~

?

850-------------- - - - ? Aldebaran

-845----------------- ? Sandstone

Barfield Formation

?rmmmmrmlTnm Oxtrack Formation

z 840------------? !! Cattle Creek Formation

BuHel Formation

::; 8 3 1 - - - - - - - - - - - - - - - - -

7830------------------

c... 8 2 5 - - - - - - - - - - - - - - - - ~ 815 beds

Camboon Volcanics

ffi

Reids Dome

I

II:

I

basement

;:Ii

Sequem:e boundaries ('I'1"";f1 Major unconformities

?

-- - -- Maximum flooding surface ___ Other boundaries

Correlation between columns uncertain

Sequence stratigraphic interpretation by A.T. Wells, A.T. Brakel & J.M. Totterdell Fault interpretation by R.J. Korsch & J.M. Totterdell Digitising of sections and contour generation by M.G. Nicoll using Petroseis'" software Grid size 1000 metres Minor manual editing of the contours by R.J. Korsch & M.G. Nicon This is a provisional map, subject to change Map plotted: June 1994

+

+

+

25 00 005

This map accompanies a text publication: Wells, A.T., Brakel, A.T., Totterdell, J.M., Korsch, R.J., & Nicoll, M.G., 1994. Sequence stratigraphic interpretation of seismic data north of 26'S, Bowen and Surat Basins, Queensland. Australian Geological Survey Organisation, Record 1993151. The digital data for this map were compiled using Petroseis rM software and may be suttable for transfer to other digital systems. Information on formats, release conditions, and costs can be obtained from: AGSO Sales Centre GPO Box 378, Canberra ACT 2601 PH (06) 249 9519 FAX (06) 249 99B2

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AGSO PROJECT 112,05: SEDIMENTARY BASINS OF EASTERN AUSTRALIA

NGMA PRODUCT OF THE NATIONAL GEOSCIENCE MAPPING ACCORD

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Commonwealth of Australia 1994

This work is copyright. Apart from any fair dealings for the purposes of study, research, criticism or review, as permitted under the Copyright Act, no part may be reproduced by any process without written permission. Copyright is the responsibilily of the Executive Director, Australian Geological Survey Organisation. Inquiries should be directed to the Principal Information Officer, Australian Geological Survey Organisation, GPO Box 378, Canberra ACT 2601. The Commonwealth does not warrant that this map is definitive, nor free of error and does not accept liability for any loss caused or arising from reliance upon information provided herein.

AGSO

BOWEN BASIN NORTH OF 26°8, C~UEEN8LAND 14. STRUCTURE CONTOUR MAP OF 895 REFLECTOR IN TWO-WAY TIME (INTRA-MOOLAYEMBER FORMATION) 23. 30

OoSr-------------------------~----------------------------------------------------------------------~--------~----------------~------------------~-y-------------------------------------------~

ORCANISA.TION

•

1:500000

o

20 I

10

HAd

30 I

40

50

I

I

KILOMETRES UNIVERSAL TRANSVERSE MERCATOR PROJECTION AUSTRALIAN NA nONAL SPHEROID

CENTRAL MERIDIAN 14700 OOE

Contour interval

100 milliseconds

LEGEND

+

24 00 005

+

Structure contour (ms) Fault Subsurface limit of horizon Inferred subsurface limit of horizon

- - - - - 800 - - - -

- -- ---- - ---- -

DENISON TROUGH

TAROOM TROUGH

I"june Creek. Group

"iii

...,

Injune Creek Group

Hunon Sandstone

III

Hutton Sandstone

530

a: ::J

[ Westgrove Ironstone Mbr

- _.-.- --- -- - - ----- 525

Evergreen Formation Precipice Sandstone

Westgrove Ironstone Mbr ] ---._-----_._-_._Evergreen Formation

520

Precipice Sandstone

(i'tY('1'1 $'0 ~~ _________ Moolayember Fm 895 - - - _______ Moolayember Fm

~

- - - - - - - - - - - - - - - - - 890

Clematis Group

___ _ _______ ______ _

~

Showgrounds Sandsto ne

B85------------Clematis Gp

. - - - - - - - - - - - - - - - - - 880 - - - - - - - - - - - - - - - - - 875------- - - - - - - · Rewan Group

Rewan Group

- - - - - - - - - - - - - - - - - - - - - . 870 - - - - - - _____ _ _____ _ Bandanna Formation

cz

24 30 005

+

+

Alley Shala :e 86' - - - -Black -------------1

+

ffi

0.

w

Peawaddy Formation

Ingelara Formation

Aldebaran

-845----------------- 7 Sandstone

z 840------------7 !! Cattle Creek Formation ::s 83' ________________ _

ffi

Gyranda Formation

860 - - - - - - - - - - - - - - - - - Rat Top Formation

856 ·- - - - - - - - - - - - - - - - - ? 855 - - - - - - - - - - - - - - - - - -

:3>- 8~-----Freitag Formation --------- --7

0.

---=:.:=======---Baralaba Coal Measures

865

Reids Dome

Barfield Formation

?

Oxtrack Formation

'rmmmmmmmm Suffel Formation

?830-----------------_ Camboon Volcanics

825----------------beds

)00

ii! 8'5~f'Y'('l"::'"f'l"('1'1 :i basement - - - - Sequence boundaries

rtrr"1'1 Major unconformities ?

"

25 00 OOS

+

+

Maximum flooding surface Other boundaries

Correlation between columns uncenain

Sequence stratigraphic interpretation by AT, Wells, A.T, Brakel & J.M, Totterdell Fault interpretation by R.J. Korsch & J,M. Totterdell Digitising of sections and contour generation by M,G, Nicoll using Petroseis'" software Grid size 1000 metres Minor manual ed~ing of the contours by R.J, Korsch & M.G, Nicoll This is a provisional map, subject to change Map plotted: June 1994

-'...•.

+

+

"

--- - - -

This map accompanies a text publication: Wells, A.T" Brakel, A,T" Totterdell, J,M" Korsch, R.J" & Nicoll, M,G" 1994, Sequence stratigraphie interpretation of seismic data north of 26°S, Bowen and Surat Basins, Queensland, Australian Geological Survey Organisation, Record 1993151. The digital data for this map were compiled using Petroseis"" software and may be suitable for transfer to other digital systems, Infonnation on formats, release conditions, and costs can be obtained from: AGSO Sales Centre GPO Box 378, Canberra ACT 2601 PH (06) 249 9519 FAX (06) 249 9982

'

Emerald

Duaringa

Rockhampton

• N.T.

W.A.

/ 25 30 OOS

+

+

Mitchell

Roma

Chinc:1i11a

•

•

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+

ONSHORE SEDIMENTARY & PETROLEUM GEOLOGY PROGRAM AGSO PROJECT 112,05: SEDIMENTARY BASINS OF EASTERN AUSTRALIA

NGMA

/

PRODUCT OF THE NATIONAL GEOSCIENCE MAPPING ACCORD

© Commonwealth of Australia 1994

\

0 0 ~ ~

0 0

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26

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00129S31~0~00~E~--------------------------11~4R8~0~01(OVO~E~----------------~--~L---~144F8~3~01n0nOE~----------------~--------1144q9~0~0~01r0~E~--~--------L----L---L~~1~4~9~30~noon,E;-----~~~--~~-L----~-L~1~50~0~0~0~0~E--~L-----------------------1-5-0~30 OOE

This work is copyright Apart from any fair dealings for the purposes of study, research, criticism or review, as permitted under the Copyright Act, no part may be reproduced by any process without written permission, Copyright is the responsibility of the Executive Director, Australian Geological Survey Organisation. Inquicies should be directed to the Principal Information Officer, Australian Geologica l Survey Organisation, GPO Box 378, Canberra ACT 2601. The Commonwealth does not warrant t"1at this map is definitive, nor free of error and does not accept liability for any loss caused or a:ising from reliance upon information provided herein,

AGSO

SURAT BASIN NORTH OF 26°S, QUEENSLAND 15. STRUCTURE CONTOUR MAP OF 810 REFLECTOR IN TWO-WAY TIME (BASE OF PRECIPICE SANDSTONE) 23 30

OOSr------------------------,.-------------------------------------------------------------------~-------,r----------------~--------------------~----------------------------------------_,

AUSTRALIAN GECLOGlCALSURVEY ORGA.NISA.TION

.

1:500000 "

,

0

6

20 I

10

40

50

I

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Ed

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UNIVERSAl. TRANSVERSE MERCATOR PROJECTION AUSTRALIAN NATIONAL SPHEROID CENTRAL MERIDIAN 14700 OUE

Contour interval

100 milliseconds

LEGEND

+

24 00 005

+

Structure contour (ms) Fault Subsuriace limit of horizon Inferred subsuriace limit of horizon

---800----

DENISON TROUGH

TAROOM TROUGH

Injune Creek Group

Injune Creek Group

Hutton Sandstone

- - - - - - - _ . MoolayemberFm

695 __________ Moolayember Fm

- - - - - - - - - - - - - - - - - 800 ___________ ___ _ __ _

Showgrounds Sandstone 885 - - - - - - - - - - - - Clematis Gp

Clematis Group

·-----------------800 - - - - - - - - - - - - - - - - - 875-------------·

Rewan Group

-

24 30 005

+

+

+

AewanGroup

- -- - - - - - - - - - - - - - - - - . 870 - - - - - - - - - - - - - - __ _ _ Bandanna Formation

B65

~

Black Al ley Shale

ffi

F'eawaddy Formation

Baralaba Coal Measures .Gyranda Formation

iii! 861 - - - - - - - - - - - - - - - - - 7 860------------------

+

Flat Top Formation

856·----------------- ? 8 5 5 - - - - - - - - - - - - - - - - - w Ingelara Formation Barfield Formation ~ 7

Q..

::3

Freitag Formation 850 - - - - - - - - - - - - - - - - - 7 AJdebaran

Ottrack Formation

? ('f"1"i'f"YY'M'Y'f"t'Y'1"l"1'M-'Y'f''t'Y'M'Y

-845----------------- 7

.....

Sandstone ~~-------------? :$ Canle Creek Formation

::;; 831-----------------

ffi

Reids Dome

Buffel Formation

7830-----------------Camboon Volcanics

825----------------~ B beds

Q.

..."

~ w

15

I I I basement

I'

- - - - Sequence boundaries

rI"Yf""M Major unconformities ?

_. _. _ Maximum flooding surface - _ Otfler boundaries

Correlation between columns uncertain

Sequence stratigraphie interpretation by A.T. Wells, A.T. BraKel & J.M. Totterdell Fault interpretation by R.J. Korsch & J.M. Totterdell Digitising of sections and contour generation by M.G. Nicoll using Petroseis 1M sol\ware G rid size 1000 metres Minor manual editing of the contours by R.J. Korsch & M.G. Nicoll This is a provisional map, subject to change Map plotted: June 1994

25 00 oos

This map accompanies a teXl publication: Wells, A.T., BraKel, A.T., Totterdell, J.M., Korsch, R.J., & Nicoll, M.G., 1994. Sequence stratigraphic interpretation of seismic data north of 26"S, Bowen and Surat Basins, Queensland. Australian Geological Survey Organisation, Record 1993/51.

+

The digital data for this map were compiled using Petroseis'" software and may be suitable for transfer to other digital systems. InfOlmation on formats, release conditions, and costs can be obtained from: AGSO Sales Centre GPO Box 378, Canberra ACT 2601 PH (06) 249 9519 FAX (06) 249 9982

Emerald

Duaringa

I Rockhampton N.T.

,,

Manto

WA

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ONSHORE SEDIMENTARY & PETROLEUM GEOLOGY PROGRAM AGSO PROJECT 112.05: SEDIMENTARY BASINS OF EASTERN AUSTRALIA

NGMA

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PRODUCT OF THE NATIONAL GEOSCIENCE MAPPING ACCORD

400----

V\

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26 00129S30~0~0~E~--------------------------~14~8~O¢OlnonOE~--------~~-----L--~----~1~4~8~3~0~OlcO¥E~--------------J---~------1~4;9frO~0~0~OE~--~~-------L----~~--~~1~~~9~30~O~O~E~----~----~----~~------~15~0~0~0~0~0~E--------__~__1-__~~~~~_~~ 150 30 OOE

© Commonwealth of Australia 1994 This worK is copyright. Apart from any fair dealings for the purposes of study, research, criticism or review, as permitted under the Copyright Act, no part may be reproduced by any process without written permission. Copyright is the responsibility of the Executive Director, Australian Geological Survey Organisation. Inquiries should be directed to the Principal Information Officer, Australian Geological Survey Organisation, GPO Box 378, Canberra ACT 2601. The Commonwealth does not warrant that this map is definitive, nor free of error and does not accept liability for any loss caused or arising from reliance upon information provided herein.

AGSO

BOWEN BASIN NORTH OF 26°S, QUEENSLAND 16. ISOPACH MAP OF 830/831-855/856 INTERVAL IN TWO-WAY TIME 23 30

OOSr-------------------------~--------------~~~~--------------~r---~~~?-----------~~--~~~~------1l-----------------y---------------------y------------------------------------------~

AUSTRALIAN G Ecx.oclCAL SURVEY OReANISATION

1:500000

o 6

20 I

10 H

H

I

40 I

30 I

50 I

KILOMETRES UNIVERSAL TRANSVERSE MERCATOR PROJECTION AUSTRALIAN NATIONAL SPHEROID CENTRAL MERIDIAN 14700 OOE

Contour interval

-. ",

, ;

I

24 00 DOS

\"~,,

, \

50 milliseconds

LEGEND Isopach contour (ms) Fault Subsurface limit of horizon Inferred subsurface limit of horizon

---200---

...\

,, ,,

, ,

\

,, ,

l

\

\

o

.....\,'

\"

DENISON TROUGH

T AROOM TROUGH

Injune Creek Group

400 _ _~

Injune Creek Group

u

.ill...

53O=======:--

Hutton Sandstone

a:

Hunon Sandstone

L~':'~I~~!. ~o_n':I~~ ~~__ .

::>

525

Weslgrove Ironstone Mbr ]

_. _. E~;'g-;~; ~rTnali;;

Evergreen Formation

S20

Precipice Sandslona

Precipice Sandstone

-r'f'1"l"('1'1''('l'Yj'l'Yj'1''rt'1'Yftyj'1''1 S 10 ___ __ ___ .Moolayember Fm

B95 __________ Moolaycmber Fm

- - - - - - - - - - - - - - - - - BOO ________________ _ _ Showgrounds Sandstone

Clematis Group

685------- - ----Clematis Gp

- - ---------- -- - --BW - ---- - - ------- ---875---- - - - - - - - - - ·

24 30 ODS

Rewan Group Rewan Group - - - - - - - - - - - - - - : - - - - - - . 870 _____ _ __ _ _ ___ __ __ _ Bandanna Format.on Baralaba Coal Measures

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ffi Peawaddy Formalion Flat Top Formation a.. 856 -- - - - - - - - - - - - - - - - - 7855 - - - - - - - - - - _ __ _ _ __ _ w Ingelara Fonnation Barfield Formation

....

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+

The digital data for this map were compiled using Petroseis TO' software and may be su~able for transfer to other digital systems. tnformation on formats, retease conditions, and costs can be obtained from: AGSO Sales Centre GPO Box 37B, Canberra ACT 2601 PH (06) 249 9519 FAX (06) 249 9982

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AGSO

BOWEN BASIN NORTH OF 26°S, QUEENSLAND 17. ISOPACH MAP OF 855/856-860/861 INTERVAL IN TWO-WAY TIME 23 30

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Sequence stratigraphic interpretation by A.T. Wells, A.T. Brakel & J.M. Totterdell Fault interpretation by RJ. Korsch & J.M. Totterdell Digitising of sections and contour generation by M.G. Nicoll using Petroseis'" software Grid size 5000 metres Minor manual editing of the contours by R.J. Korsch & M.G. Nicoll This is a provisional map, subject to change Map plotted: June 1994

25 00 OOS

+

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This map accompanies a text publication: Wells, A.T., Brakel, A.T., Totterdell, J.M., Korsch, R.J., & Nicoll, M.G., 1994. Sequence stratigraphic interpretation of seismic data north of 26°S, Bowen and Surat Basins, Queensland. Australian Geological Survey Organisation, Record 1993151 . The digdal data for this map were compiled using Petroseis'" software and may be suitable for transfer to other digdal systems. Information on formats, release conditions, and costs can be obtained from: AGSO Sales Centre GPO Box 378, Canberra ACT 2601 PH (06) 249 9519 FAX (06) 249 9982

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\ This work is copyright. Apart from any fair dealings for the purposes of study, research, criticism or review, as permitted under the Copyright Act, no part may be reproduced by any process without written permission. Copyright is the responsibility of the Executive Director, Australian Geological Survey Organisation . Inquiries should be directed to the Principal Information Officer, Australian Geological Survey Organisation, GPO Box 378, Canberra ACT 2601. The Commonwealth does not warrant that this map is definitive, nor lree of error and does not accept liability for any loss caused or arising from reliance upon information provided herein.

AGSO

BOWEN BASIN NORTH OF 26°S, (~UEENSLAND 18. ISOPACH MAP OF 860/861-865 INTERVAL IN TWO-WAY TIME 23 30

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This work is copyright. Apart from any fair dealings for the purposes of study, research, criticism or review, as permitted under the Copyright Act, no part may be reproduced by any process without written permission. Copyright is the responsibility of the Executive Director, Australian Geological Survey Organisation. Inquiries should be directed to the Principal Information Officer, Australian Geological Survey Organisation, GPO Box 379, Canberra ACT 2601. The Commonwealth does not warrant that this map is definitive, nor free of error and does not accept liability for any loss caused or arising from reliance upon information provided herein.

AGSO

BOWEN BASIN NORTH OF 26°S, ()UEENSLAND 19. ISOPACH MAP OF 865-870 INTERVAL IN TWO-WAY TIME 23 30

ooSr-------------------------~._------------------------------------J'------------------------~y_------~~--~~~------------------~----------------------~--------------------------------------------_,

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AGSO

BOWEN BASIN NORTH OF 26°S, QUEENSLAND 20. ISOPACH MAP OF 870-880 INTERVAL IN TWO-WAY TIME 2330

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This work is copyright. Apart from any fair dealings for the purposes of study, research, criticism or review, as permitted under the Copyright Act, no part may be reproduced by any process without written pennission. Copyright is the responsibility of the Executive Director, Australian Geological Survey Organisation. Inquiries should be directed to the Principal Information Officer, Australian Geological Survey Organisation, GPO Box 378, Canberra ACT 2601. The Commonwealth does not warrant that this map is definitive, nor free of error and does not accept liability for any loss caused Dr arising from reliance upon information provided herein.

AGSO

BOWEN BASIN NORTH OF 26°S, QUEENSLAND 21. ISOPACH MAP OF 880-890 INTERVAL IN TWO-WAY TIME 23 30

OOSr-------------------------'\----------------------------------------------------------------------~~------1l----------------~~------------------~------------------------------------------~

AUSTRALIAN CEO..CX;ICAL SURVEY ORGANISATION

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Isopach contour (ms) Fault Subsurface limit of horizon Inferred subsurface limit of horizon

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DENISON TROUGH

TAROOM TROUGH

Injune Creek Group

Injune Creek Group Hutton Sandstone

Hutton Sandstone

L~~~t~~~_ ~o~.:t~~~ ~~~ _. Evergreen Formation

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___ ___ _ __ MoolayemberFm

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525

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- - _______________ _ Showgrounds Sandstone B85----- - - - - - - -Clemalis Gp

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. _________________ B80 - - - - - - - - - - - - - - - - - B75-------------· Rewan Group Rewan Group'

- - - - - - - - - - - - - - - - - - - - - - - . 870 - - - - - - - - - - - - - - - - - Bandanna Formation Baralaba Coal Measures

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Peawaddy Formation

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Ingelara Formation

665 - - - - - - - - - - Gyranda Formation B60 - - - - - - - - - - - - - - - - - Aat Top Formation

~ 856 - - - - - - - - - - - - - - - - - ? 855 - - - - - - - - - - - - - - - - - ~

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Aldebaran -845----------------- ? Sandstone z 840 ? $ Cattle Creek Formation

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Balfield Formation

?nmmmmmmmn Oldrack Formation

Buffel Formation

::e 8 3 1 - - - - - - - - - - - - - - - - -

7830------------------

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Sequence boundaries

('"M"'('1'1 Major unconformWes

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---___ Other boundan'es

Corrslation between columns uncertain

Sequence stratigraphic interpretation by A.T. Wells, A.T. Brakel & J.M. Totterdell Fault interpretation by R.J. Korsch & J.M. Totterdell Digitising of sections and contour generation by M.G. Nicoll using Petroseis'" software Grid size 5000 metres Minor manual editing of the contours by R.J. Korsch & M.G. Nicoll This is a provisional map, subject to change Map plotted: June 1994

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© Commonwealth of Australia 1994 This work is copyright. Apart from any fair dealings for the purposes of study, research, criticism or review, as permitted under the Copyright Act, no part may be reproduced by any process without written permission. Copyright is the responsibility of the Executive Director, Australian Geological Survey Organisation. Inquiries should be directed to the Principal Information Officer, Australian Geological Survey Organisation, GPO Box 378, Canberra ACT 2601. The Commonwealth does not warrant L'lat this map is delinitive, nor free of error and does not accept liability for any loss caused or ansing from reliance upon information provided herein.

BOWEN BASIN NORTH OF 26°8,

AGSO

C~UEENSLAND

22. ISOPACH MAP OF 890-S10 INTERVAL IN TWO-WAY TIME 23 30

oosr--------------------------.-----------------------------------------------------------------------~-------,.----------------.---------------------.--------------------------------------------.

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z 665 ---=-:=====::.::~--< Black Alley Shale GyraOda Formation :!l B6! - - - - - - - - - - - - - - - - - 7 B60 - - - - - - - - - - - - - - - - - -

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B56 ----------------------- 1855------- - ----- ----- -- ___ _ Ingelara Formation

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- - --- Sequence boundaries - --- -__ Maximum flooding surface Major unconformities - Other boundaries ' ? Correlation between columns uncertain

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Sequence stratigraphic interpretation by A.T. Wells, A.T. Brakel & J.M. Totterdell Fault interpretation by R.J. Korsch & J.M. Totterdell Digitising of sections and contour generation by M.G. Nicoll using Petroseis n.r software Grid size 5000 metres Minor manual editing of the contours by R.J. Korsch & M.G. Nicoll This is a provisional map, subject to change Map ploned: June 1994

25 00 005

+

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This work is copyright. Apart from any fair dealings for the purposes of study, research, criticism or review, as permitted under the Copyright Act, no part may be reproduced by any process without written permission. Copyright is the responsibility of the Executive Director, Australian Geological Survey Organisation. Inquiries should be directed to the Principal Information Officer, Australian Geological Survey Organisation, GPO Box 378, Canberra ACT 2601 . The Commonwealth does nol warrant that this map is definitive, nor free of error and does not accept liability for any loss caused or arising from reliance upon information provided herein.