Insights into lithospheric architecture, fertilisation and fluid pathways from AusLAMP MT

Stephan Thiel; Anthony Reid; Graham Heinson; Kate Robertson

doi:10.1071/ASEG2016ab261

25th International Conference and Exhibition – Interpreting the Past, Discovering the Future

ISSN: 2202-0586
E-ISSN:

oa Insights into lithospheric architecture, fertilisation and fluid pathways from AusLAMP MT
Authors Stephan Thiel^a,b, Anthony Reid^a, Graham Heinson^c and Kate Robertson^c
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^a Department of State DevelopmentGeological Survey of South Australia, Level 4, 101 Grenfell Street Adelaide, , SA, 5000 ^b Geology and Geophysics School of Physical SciencesThe University of Adelaide, Adelaide, , SA, 5005, [email protected] ^c Geology and Geophysics School of Physical SciencesThe University of Adelaide, Adelaide, , SA, 5005
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2016, Issue 25th International Conference and Exhibition – Interpreting the Past, Discovering the Future, Dec 2016, p. 1 - 6
DOI: https://doi.org/10.1071/ASEG2016ab261
- Published online: 01 Dec 2016

Abstract

The Australian Lithospheric Architecture Magnetotelluric Project (AusLAMP) has the goal to map the electrical resistivity of the Australian lithosphere to constrain the geodynamic framework of the continent. Data acquisition in South Australia has covered two-thirds of the state to date. Three-dimensional resistivity models of subsets of the AusLAMP grid across the Gawler Craton show a generally electrically resistive crust and lithosphere, but an area of low resistivity between depths of 100 km and 200 km beneath the Gawler Range Volcanics exists. A possible explanation is a fertilised mantle signature as a result of metasomatic events in the Proterozoic. The continuous low resistivity connection along the margins of the Gawler Craton core to the surface coincides with the prospective IOCG belt along the eastern margin of the Gawler Craton. The results support the importance of the AusLAMP project to define the lithospheric architecture of the continent and the value of primary lithospheric architecture for mineral exploration.

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References

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/content/journals/10.1071/ASEG2016ab261

Article Type: Research Article

Keyword(s): AusLAMP; Gawler Craton; lithosphere; magnetotellurics; South Australia

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