A regional scale Fixed-Wing TDEM survey of the Palaeo-Proterozoic Bryah Basin, Western Australia: Providing insights into a setting highly prospective for VMS Cu-Au and mesothermal Au Systems

Tim Munday; Yusen Ley-Cooper; Simon Johnson; Ian Tyler

doi:10.1071/ASEG2013ab208

ISSN: 2202-0586
E-ISSN:

oa A regional scale Fixed-Wing TDEM survey of the Palaeo-Proterozoic Bryah Basin, Western Australia: Providing insights into a setting highly prospective for VMS Cu-Au and mesothermal Au Systems
Authors Tim Munday^a, Yusen Ley-Cooper^b, Simon Johnson^c and Ian Tyler^d
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^a CSIRO ESRE, Perth, , Australia, [email protected] ^b CSIRO ESRE, Perth, , Australia, [email protected] ^c GSWA, Perth, , Australia, [email protected] ^d GSWA, Perth, , Australia, [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2013, Issue ASEG2013 - 23rd Geophysical Conference, Dec 2013, p. 1 - 4
DOI: https://doi.org/10.1071/ASEG2013ab208
- Published online: 01 Dec 2013

Abstract

The Bryah Basin is part of the Capricorn Orogen, a collision zone between the Archaean Pilbara and Yilgarn Cratons in western Australia. The Basin is host to significant mineralisation, including mesothermal orogenic gold, copper-gold volcanogenic massive sulphides. Among the challenges in the exploration for these mineral systems is the paucity of outcrop and the extent and variability of a complex regolith cover. To better understand this regolith, a reconnaissance, regional-scale, fixed-wing time domain AEM survey was undertaken over the Bryah Basin in 2012. The resulting data were inverted using a smooth model layered earth inversion. In this paper we compare results on mapping regolith variability obtained from the full inversion of the AEM data against that defined from the fast approximate transform of the same data set. The inverted data show the most dominant regolith features are associated with sediment filled palaeovalleys. The regional regolith framework determined from this study provides a basis for better understanding and interpreting an extensive regolith geochemical data set with respect to metalloid anomalies linked to buried Cu-Au mineral systems

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References

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Article Type: Research Article

Keyword(s): Bryah Basin; Fixed-Wing AEM Systems; inversion; Regolith Cover

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oa A regional scale Fixed-Wing TDEM survey of the Palaeo-Proterozoic Bryah Basin, Western Australia: Providing insights into a setting highly prospective for VMS Cu-Au and mesothermal Au Systems

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