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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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Identification info

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

Cited responsible party
Role Organisation / Individual Name Details
Author

Kirkby, A.

External Contact
Author

Duan, J.

MEG Internal Contact
Name

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

Purpose

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

Status
Completed
Spatial representation type
Topic category
  • Geoscientific information

Extent

Extent

N
S
E
W


Maintenance and update frequency
As needed

Resource format

Title

Product data repository: Various Formats

Website

Data Store directory containing the digital product files

Data Store directory containing one or more files, possibly in a variety of formats, accessible to Geoscience Australia staff only for internal purposes

theme.ANZRC Fields of Research.rdf
  • EARTH SCIENCES

Discipline
  • magnetotelluric

Discipline
  • resistivity

Keywords
  • Published_External

Resource constraints

Title

Creative Commons Attribution 4.0 International Licence

Alternate title

CC-BY

Edition

4.0

Website

http://creativecommons.org/licenses/

Access constraints
License
Use constraints
License
Other constraints

© Commonwealth of Australia (Geoscience Australia) 2019

Resource constraints

Classification
Unclassified

Associated resource

Association Type
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

Website

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

Link to eCat metadata record landing page

Language
English
Character encoding
UTF8

Distribution Information

Distributor contact
Role Organisation / Individual Name Details
Distributor

Commonwealth of Australia (Geoscience Australia)

Voice facsimile
OnLine resource

Link to Conference

Link to Conference

Distribution format
OnLine resource

Link to Extended Abstract

Link to Extended Abstract

Distribution format
OnLine resource

Download poster (pdf) [1.2 MB]

Download poster (pdf) [1.2 MB]

Distribution format
  • pdf

    File decompression technique

    nil

Resource lineage

Statement

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

Hierarchy level
Product

Metadata constraints

Classification
Unclassified

Metadata

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

Title

GeoNetwork UUID

Type of resource

Resource scope
Document
Name

Conference Abstract

Alternative metadata reference

Title

Geoscience Australia - short identifier for metadata record with

uuid

Citation identifier
eCatId/116201

Metadata linkage

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

Point-of-truth metadata URL

Metadata linkage

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

Metadata standard

Title

AU/NZS ISO 19115-1:2014

Metadata standard

Title

ISO 19115-1:2014

Metadata standard

Title

ISO 19115-3

Edition date
2015-07-01T00:00:00
Title

Geoscience Australia Community Metadata Profile of ISO 19115-1:2014

Edition

Version 2.0, April 2015

 
 

Spatial extent

N
S
E
W


Keywords

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

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