The conductivity structure of the Georgina-Arunta region from magnetotelluric data

We present an updated resistivity model from inversion of the 09GA-GA1 deep magnetotelluric survey, also known as the Georgina-Arunta survey. The data were originally collected in 2009 under Geoscience Australia’s Onshore Energy Security Program, together with deep seismic reflection data along the same line. The magnetotelluric data comprise broadband and long-period data. The broadband data were originally processed to a bandwidth of 0.04 s to 100 s, but have been reprocessed yielding an extended bandwidth of 0.04 s to 1000 s, which improves the resolution of deeper (>20 km depth) structures. Inversions have been carried out using the ModEM 3D inversion code given that the data indicate the presence of 3D geoelectric structure. The updated resistivity model reveals that the Casey Inlier and Irindina Province are associated with high resistivities (>2000 Dm). In contrast, the Aileron Province, which underlies and surrounds the Irindina Province, is predominantly conductive (resistivities <50 Dm). The Georgina Basin is associated with low resistivities, as would be expected for a sedimentary basin, while the Amadeus Basin is associated with low resistivities in the southern part of the line (where it overlies the Casey Inlier), and higher resistivities further north.


Abstract for Australian Exploration Geoscience Conference (AEGC) 18-21 February 2018, Sydney NSW

( https://www.aig.org.au/events/first-australian-exploration-geoscience-conference/)

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Date (Creation)
2018-01-19T09:00:00
Date (Publication)
2024-10-01T05:32:05
Citation identifier
Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/116201

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Kirkby, A.

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Duan, J.

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Australian Exploration Geoscience Conference (AEGC) 18-21 February 2018, Sydney NSW

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Abstract presented in the Australian Exploration Geoscience Conference (AEGC) 18-21 February 2018, Sydney NSW

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  • Geoscientific information

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  • EARTH SCIENCES

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  • magnetotelluric

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  • resistivity

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  • Published_External

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Creative Commons Attribution 4.0 International Licence

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4.0

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© Commonwealth of Australia (Geoscience Australia) 2019

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Cross reference
Title

Crustal Structure of the Eastern Arunta Region, Central Australia, From Magnetotelluric, Seismic, and Magnetic Data

Citation identifier
121123

Citation identifier
f5181ad0-8a13-4c4a-b5f0-8eeba47efb2e

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http://pid.geoscience.gov.au/dataset/ga/121123

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Commonwealth of Australia (Geoscience Australia)

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Download poster (pdf) [1.2 MB]

Download poster (pdf) [1.2 MB]

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Contains interpretations of reprocessed magnetotelluric data collected along the 09GA-GA1 line in 2009

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urn:uuid/5fa93594-bc6e-48de-a279-d15539cc2599

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eCatId/116201

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https://internal.ecat.ga.gov.au/geonetwork/srv/eng/search?uuid=5fa93594-bc6e-48de-a279-d15539cc2599

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https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/5fa93594-bc6e-48de-a279-d15539cc2599

Date info (Creation)
2018-01-19T00:22:35
Date info (Revision)
2018-01-19T00:56:20

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AU/NZS ISO 19115-1:2014

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ISO 19115-1:2014

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ISO 19115-3

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2015-07-01T00:00:00
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Geoscience Australia Community Metadata Profile of ISO 19115-1:2014

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Version 2.0, April 2015

 
 

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magnetotelluric resistivity
theme.ANZRC Fields of Research.rdf
EARTH SCIENCES

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