The Warrabin Trough,western Adavale Basin,Queensland |
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| Authors: | J Pinchin B R Senior |
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| Institution: | 1. 30 Greenough Circuit, Kaleen, A.C.T., 2617;2. Hunting Geology &3. Geophysics (Australia) Pty Ltd , PO Box 365, Fyshwick, A.C.T., 2609 |
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| Abstract: | The Warrabin Trough in SW Queensland contains up to 3000 m of Devonian sedimentary rocks, and is a structural remnant of the formerly widespread Adavale Basin. Seismic data recently obtained by the Bureau of Mineral Resources enable reinterpretation of existing poorer quality seismic data, so that the structural framework and most of the trough margin can be mapped. Sedimentary rocks in the trough are folded and are displaced by high‐angle reverse faults, which were probably active during the Late Carboniferous. LANDSAT studies provide additional information on the position of faults, which on seismic records appear to be mainly contained within the trough sequence. Differential compaction, together with slight post‐Cretaceous rejuvenation of some structures, may have given surface expression to some of these deep faults. The western margin of the trough has been drilled, but only 775 m of the Devonian sequence was penetrated. The petroleum source‐rock and maturation levels do not appear encouraging on the basis of this drilling. However, the thick sequence of arenites, lutites and carbonates, interpreted to occur in the trough, offer considerable potential for hydrocarbon source‐rocks and reservoirs. |
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| Keywords: | Warrabin Trough Adavale Basin Devonian seismic LANDSAT lineaments petroleum potential |
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