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Regional Structure of the Gippsland Basin : Interpretation and Mapping of a Deep Seismic Data Set

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Created 20/01/2025

Updated 20/01/2025

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A unique grid of deep (12-14 second record length) seismic reflection and refraction data was recorded by the Australian Geological Survey Organisation (formerly the Bureau of Mineral Resources, Geology & Geophysics) across the offshore Gippsland Basin and parts of the adjacent Bass Basin in 1988-1989. These data have been interpreted to produce a new model for the development of the Gippsland and adjacent Bass Strait basins as well as giving a greater understanding of the basins' petroleum potential. In general terms, the Gippsland Basin contains up to 16km of sediment in an ESE-trending depocentre bounded on its north and northwestern margins by a detachment ramp, and on its southern side by a relatively linear, listric fault system. The basin, together with the adjacent Bass and Otway Basins, appears to have formed as part of a linked, largely- strike-slip to 'transtensional' system, which started to extend through Bass Strait, probably during the latest Jurassic. Each of the basins developed by movement on a common detachment or detachment complex, which produced headwall extension at their western ends, in the areas now occupied by the Strzelecki Ranges, Otway Ranges - Torquay Sub-basin, and Robe Trough. Adjustments and reactivation from the mid Cretaceous of several postulated microplates in the region, largely in response to Tasman Basin rifting, gave rise to the wrench-related and compressional structures which form the major petroleum targets in the Gippsland Basin. However, the same process formed largely extensional structures in the Bass Basin. Our interpretation of the tectonic history of the Gippsland Basin leads us to the conclusion that there may have been several phases of petroleum generation and migration, and that potential petroleum traps appear to exist in the deeper section, in structures sometimes not reflected at the top or near-top Latrobe Group levels.

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Title Regional Structure of the Gippsland Basin : Interpretation and Mapping of a Deep Seismic Data Set
Language eng
Licence notspecified
Landing Page https://devweb.dga.links.com.au/data/dataset/214cdddc-df42-496c-a5a6-dc9d500066e9
Contact Point
Geoscience Australia
clientservices@ga.gov.au
Reference Period 20/04/2018
Geospatial Coverage http://www.ga.gov.au/place-names/PlaceDetails.jsp?submit1=GA1
Data Portal data.gov.au

Data Source

This dataset was originally found on data.gov.au "Regional Structure of the Gippsland Basin : Interpretation and Mapping of a Deep Seismic Data Set". Please visit the source to access the original metadata of the dataset:
https://devweb.dga.links.com.au/data/dataset/regional-structure-of-the-gippsland-basin-interpretation-and-mapping-of-a-deep-seismic-data-set

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