Structural fabric and tectonics associated with the Polda Lineament, South Australia – a geophysical and morphotectonic assessment

D. H. Tucker; R. G. Nelson; J. C. Pitt

doi:10.1071/EG991401

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

Structural fabric and tectonics associated with the Polda Lineament, South Australia – a geophysical and morphotectonic assessment
Authors D. H. Tucker^a, R. G. Nelson^b and J. C. Pitt^c
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^a Preview Resources Pty Ltd, P.O. Box 305 Eastwood, , S.A, . 5063 ^b S.A. Department of Mines and Energy, P.O. Box 151 Eastwood, S.A, . 5063 ^c Pitt Research Pty Ltd, 377 Seaview Road Henley Beach, S.A, . 5022
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 22, Issue 2, Jun 1991, p. 401 - 404
DOI: https://doi.org/10.1071/EG991401
- Published online: 01 Jun 1991

Abstract

A knowledge of the structural and tectonic processes which have controlled the evolution of the Archaean/Proterozoic Gawler Craton in South Australia is crucial to an understanding of the geology of the southern central Australian continent.

A particular feature transecting the southern portion of the Craton is the Polda Lineament, which extends east-west for possibly up to 1600 kilometres. Both vertical and lateral movements have been prevalent within this zone of crustal yielding from – Lower Proterozoic to Cenozoic times. The most obvious indication of the lineament is the Polda Trough, an area of deep sedimentary section. However, extensions to the lineament are now recognised eastwards across lead-zinc mineral fields in the eastern Gawler Craton, and, albeit less prominently, cutting the ?Adelaidean to ?Cambrian basement of the Murray Basin.

The Polda Lineament is now seen as a major zone of crustal yielding, with important connotations for mineral and petroleum exploration.

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1991-06-01

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References

Brown, C. M., Tucker, D. H., and Anfiloff, V., (1988). ‘An interpretation of the tectonostratigraphic framework of the Murray Basin region of southeastern Australia, based on an examination of airborne magnetic patterns’. Tectonophysics, 154, 309-333.
Campbell, I. B., and O’Driscoll, E. S. T, (1989). ‘Lineament-hydrocarbon associations in the Cooper-Eromanga Basins’. In: O’Neill, B.J. (ed), The Cooper-Eromanga Basins, Australia, Proceedings of the Petroleum Exploration Society of Australia, Society of Petroleum Engineers and the Australian Society of Exploration Geophysicists (SA Branch), Adelaide.
Nelson, R. G., Crabb, T. N., and Gerdes, R. A., (1986). ‘A review of geophysical exploration in the Polda Basin, South Australia’. APEA Journal, 26, 319-333.
O’Driscoii, E. S. T, (1985). ‘The application of lineament tectonics in the discovery of the Olympic Dam Cu-Au-U deposit at Roxby Downs, South Australia’. Global Tectonics and Metallogeny, 3, 43-57.
Townsend, I. J., (1988). ‘Review of lead-zinc mineralisation in South Australia — Gawler Craton’. South Australian Department of Mines and Energy, Report Bk No.: RB 88/61.
Veevers, J. J. (ed), (1984). The Phanerozoic earth history of Australia. Clarendon Press, Oxford, 423 pp.

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Article Type: Research Article

Keyword(s): Polda lineament structure

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Structural fabric and tectonics associated with the Polda Lineament, South Australia – a geophysical and morphotectonic assessment

Abstract

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