3D Modelling of magnetotelluric data along the Youanmi deep seismic reflection transects in the Yilgarn, Western Australia  

Authors / CoAuthors

Milligan, P.R.

Abstract

Geoscience Australia (GA) has been acquiring both broadband and long-period magnetotelluric (MT) data over the last few years along deep seismic reflection survey lines across Australia, often in collaboration with the States/Territory geological surveys and the University of Adelaide. Recently, new three-dimensional (3D) inversion code has become available from Oregon State University. This code is parallelised and has been compiled on the NCI supercomputer at the Australian National University. Much of the structure of the Earth in the regions of the seismic surveys is complex and 3D, and MT data acquired along profiles in such regions are better imaged by using 3D code rather than 1D or 2D code. Preliminary conductivity models produced from the Youanmi MT survey in Western Australia correlate well with interpreted seismic structures and contain more geological information than previous 2D models. GA has commenced a program to re-model with the new code MT data previously acquired to provide more robust information on the conductivity structure of the shallow to deep Earth in the vicinity of the seismic transects.

Product Type

nonGeographicDataset

eCat Id

75461

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Keywords

• External Publication

( Theme )

• magneto-tellurics

( Theme )

• numerical modelling

( Theme )

• seismic reflection

Australian and New Zealand Standard Research Classification (ANZSRC)

• Earth Sciences

• Published_Internal

Publication Date

2013-01-01T00:00:00

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Australian Government Security ClassificationSystem    

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Creative Commons Attribution 4.0 International Licence    

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notPlanned

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geoscientificInformation

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This is an ASEG extended abstract for the ASEG2013 conference, based on magnetotelluric data acquired along the Youanmi seismic transects in the Yilgarn of Western Australia.

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Magnetotelluric data acquired in a joint project with the Geological Survey of Western Australia. 117.0 121.0 -28.3 -26.0