Evolution and Structuring of the Offshore Otway Basin, Victoria as Delineated by Aeromagnetic Data

P. J. Gunn; J. Mitchell; T. Mackey; D. Cathro

doi:10.1071/EG995262

ISSN: 0812-3985
E-ISSN: 1834-7533

Evolution and Structuring of the Offshore Otway Basin, Victoria as Delineated by Aeromagnetic Data
Authors P. J. Gunn^a, J. Mitchell^b, T. Mackey^b and D. Cathro^b
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^a Australian Geological Survey Organisation, GPO Box 378 Canberra, ACT, 2601, Phone: (06) 249 9226, Fax: (06) 249 9986 ^b Australian Geological Survey Organisation, GPO Box 378 Canberra, ACT, 2601
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 26, Issue 2-3, Jun 1995, p. 303 - 308
DOI: https://doi.org/10.1071/EG995262
- Published online: 01 Jun 1995

Abstract

A large portion of the western offshore Victorian portion of the Otway Basin appears to have originally been underlain by an extensive horizontal basic magnetic sheet emplaced during the initial stages of basin formation. Subsequent basin extension along transfer faults trending at 210 degrees has fractured this sheet, and evidence of the transfer fault fracture system is given by the present day outlines of the magnetic anomalies arising from the fragments of the sheet. The transfer fault system is further indicated by linear magnetic anomalies within the sedimentary section due to magnetic material accumulated in the fault planes. Gravity and seismic data support the transfer fault model which can be used to explain features of the depositional history and structural development of the area.

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References

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Article Type: Research Article

Keyword(s): aeromagnetic; Eastern Voluta Trough; extension; fault; gravity; Offshore Otway Basin; seismic; transfer; Western Voluta Trough

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Evolution and Structuring of the Offshore Otway Basin, Victoria as Delineated by Aeromagnetic Data

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