Tectonic Evolution of Bass Strait–Origins of Tertiary Inversion

I. M. Young; M. A. Trupp; M. J. Gidding

doi:10.1071/EG991465

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

Tectonic Evolution of Bass Strait–Origins of Tertiary Inversion
Authors I. M. Young^a, M. A. Trupp^a and M. J. Gidding^a
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^a The Shell Company of Australia Ltd., 1 Spring Street Melbourne, Vic, . 3000
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 22, Issue 2, Jun 1991, p. 465 - 468
DOI: https://doi.org/10.1071/EG991465
- Published online: 01 Jun 1991

Abstract

The sedimentary basins of Bass Strait display a marked asymmetry of structure. This is particularly evident in the Gippsland Basin and Torquay Sub-basin where Tertiary structures are better developed along their northern margins. The origins of this asymmetry are reviewed and a structural model for the evolution of Bass Strait basins set out. Mapping of the regional structures developed at three stages of the region’s evolution demonstrates that dextral strike slip movement was important throughout. During the Cretaceous the regional stress regime was dextral transtensive, changing to transpressive by the mid-Eocene. Despite early similarities in these basins’ formation, their Tertiary histories diverged, contributing to the wide variations in hydrocarbon potential seen today. It is suggested that the present day structural asymmetry is a consequence of partial inversion of initial half-graben basin geometries.

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References

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Article Type: Research Article

Keyword(s): Bass Strait; inversion; tectonics; tertiary

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Tectonic Evolution of Bass Strait–Origins of Tertiary Inversion

Abstract

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