Entity ID: 22360 Compiled by: Miyazaki, S. Year: 2002 Status: Defined
Last Revised: 2013
Rank: province Type: sedimentary Subtype: intracratonic Location: QLD Off-shore
Synonyms: NA Symbol: NA
Minimum age: Paleozoic Age method: inferred, seismic interpretation
Maximum age: Paleozoic Age method: inferred, seismic interpretation
Summary: The Bamaga Basin is a small, offshore, frontier intracratonic sag basin in northern Australia that contains about 4500m of undrilled Palaeozoic sediments.
Area (square kilometres): 26000 State: QLD Minimum present water depth (m): 50 Maximum present water depth (m): 70 Main rock types: carbonate sediments and sedimentary rocks main rock types are inferred Main depositional environment: marine and non-marine depositional environments are inferrred Minimum sediment thickness (m): 0 Maximum sediment thickness (m): 4500 interpreted from seismic Present crustal setting: continental Country: AUS
Parent: No data
Child Provinces: No data
Events: No data
Mineral Deposits: No data
Key Reference: Passmore, V.L., Williamson, P.E., Maung, T., Gary, A.R.G. 1993, The Gulf of Carpentaria - a new basin and new exploration targets., APEA Journal, 33(1), 297-314 (Refid:13193)
Comments: Basin is only mapped & attributed to limit of Australian waters. First defined by Passmore et al. (1992).
Overview: The Palaeozoic Bamaga Basin is a small, offshore intracratonic basin located within the shallow waters of the Gulf of Carpentaria, Queensland. The basin is poorly explored, with no exploration wells and a low coverage of seismic data. Previous exploration has concentrated on the overlying Mesozoic Carpentaria Basin, although most of the present geological knowledge is largely derived from onshore petroleum and stratigraphic wells and water bores. The basin comprises an asymmetric north-trending trough that developed as an intracratonic sag basin, but the actual age and lithology of the interpreted Palaeozoic section is uncertain. The thickest part of the Bamaga Basin lies just west of the trough axis, and contains more that 1.8 seconds two-way time of strata. The limits of the basin are erosional, pinching out to the east, south and west. The basin's limits are undefined north of the international boundary, however seismic mapping suggests that the basin extends well into Papua New Guinean and West Papuan waters. Regional geology suggests that source, reservoir and seal facies may be present, and that depth of burial is sufficient for hydrocarbon generation. There has been more than one period of faulting, including post-Bamaga reactivation of faults during the Cretaceous. This mild deformation and the resultant folding and faulting have created apparent structural closure at several levels. Potential for stratigraphic pinchout plays also exists where erosion has occurred along the upper flanks of the basin. Seismic anomalies that suggest the presence of hydrocarbons have been identified and are generally associated with faulting.
Images: No data
Other media: No data
- FOR PROVINCE-GENERAL: McConachie, B.A., Stainton, P.W., Barrow, M.G., Dunster, J.N., 1994, The offshore Carpentaria Basin - Gulf of Carpentaria, north Queensland, APEA Journal, 34(1), 614-625. (Refid: 13192)
- FOR PROVINCE-GENERAL: Passmore, V.L., Muang, T.U., Gray, A.R.G., Williamson, P.E., Lavering, I.H., Blake, P., Wellman, P., Vuckovic, V., Miyazaki, S., 1992, Gulf of Carpentaria Petroleum Prospectivity Study, Bureau of Mineral Resources, Geology and Geophysics, Australia, Record 1992/20, . (Refid: 13480)
- FOR PROVINCE-GENERAL: McConachie, B.A., Dunster, J.N., Wellman, P., Denaro, T.J., Pain, C.F., Habermehl, M.A., Draper, J.J., 1997, Carpentaria Lowlands and Gulf of Carpentaria Regions. IN 'North Queensland Geology' Bain J.H.C. and Draper J.J. (eds), Australian Geological Survey Organisation Bulletin/Queensland Department of Mines and Energy Qld Geo, 240/9, p365-397. (Refid: 23425)
- FOR PROVINCE-GENERAL: Passmore, V.L., Williamson, P.E., Maung, T., Gary, A.R.G., 1993, The Gulf of Carpentaria - a new basin and new exploration targets., APEA Journal, 33(1), 297-314. (Refid: 13193)