Broad-scale lithospheric structures of the Australian continent from 3D inversion of observatory and magnetometer array

Liejun Wang; Adrian Hitchman; Andrew Lewis; Peter Crosthwaite; William Jones

doi:10.1071/ASEG2015ab234

24th International Geophysical Conference and Exhibition – Geophysics and Geology Together for Discovery

ISSN: 2202-0586
E-ISSN:

oa Broad-scale lithospheric structures of the Australian continent from 3D inversion of observatory and magnetometer array
Authors Liejun Wang^a, Adrian Hitchman^b, Andrew Lewis^c, Peter Crosthwaite^d and William Jones^e
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^a Geoscience Australia, GPO Box 378, Canberra, 2601, [email protected] ^b Geoscience Australia, GPO Box 378, Canberra, 2601, [email protected] ^c Geoscience Australia, GPO Box 378, Canberra, 2601, [email protected] ^d Geoscience Australia, GPO Box 378, Canberra, 2601, [email protected] ^e Geoscience Australia, GPO Box 378, , Canberra, 2601, [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2015, Issue 24th International Geophysical Conference and Exhibition – Geophysics and Geology Together for Discovery, Dec 2015, p. 1 - 4
DOI: https://doi.org/10.1071/ASEG2015ab234
- Published online: 01 Dec 2015

Abstract

An exploratory 3-D model of the electrical conductivity structure of the Australian continent is presented. The model is derived from the inversion of vertical magnetic-field transfer functions from the Australia-wide Array of Geomagnetic Stations.

The model reveals conductivity differences beneath Archaean cratons in Western Australia, enhanced-conductivity anomalies between Archaean cratonic regions and beneath Phanerozoic terranes in eastern Australia.

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References

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Chamalaun, F.H., Lilley, F.E.M. and Wang, L.J., 1999, Mapping the Carpentaria conductivity anomaly in northern Australia, Physics of the Earth and Planetary Interiors, 116, 105-115.
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Myers, J.S., Shaw, R.D. and Tyler, I.M., 1996, Tectonic evolution of Proterozoic Australia, Tectonics, 15, 1431-1446.
Siripunvaraporn, W. and Egbert, G., 2009, WSINV3DMT: Vertical magnetic field transfer function inversion and parallel implementation, Physics of the Earth and Planetary Interiors,173, 317-329.
Wang, L., Hitchman, A.P., Ogawa, Y., Siripunvaraporn, W., Ichiki M. and Fuji-ta, K. 2014, A 3-D conductivity model of the Australian continent using observatory and magnetometer array data, Geophysical. Journal. International., 198 (2): 1143-1158. doi: 10.1093/gji/ggu188.
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Article Type: Research Article

Keyword(s): 3-D inversion; cratons; electrical properties; Geomagnetic induction; lithospheric structures

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oa Broad-scale lithospheric structures of the Australian continent from 3D inversion of observatory and magnetometer array

Abstract

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