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3D resistivity models of the Delamerian Orogen, southeast Australia, from AusLAMP

Here we present 3D resistivity models of the lithosphere beneath an area of southeast Australia, derived from the Australian Lithospheric Architecture Magnetotelluric Project (AusLAMP). AusLAMP aims to collect long period magnetotelluric (MT) sites in a 55 km spaced array across Australia. With most of southeast Australia complete, we are now armed with a tool to understand the architecture of the entire lithosphere across large areas.


The AusLAMP data presented here were collected by several organisations. Geoscience Australia (GA), the Geological Survey of South Australia, the Geological Survey of New South Wales, the Geological Survey of Victoria, and the University of Adelaide all contributed staff and/or funding for collection of the data; AuScope and GA contributed instrumentation. Our resistivity models from these data encompass the Paleo-Mesoproterozoic Curnamona Province, the Neoproterozoic Flinders Ranges, and the Cambrian Delamerian Orogen, encompassing eastern South Australia and western New South Wales and western Victoria. The Delamerian Orogen marks the transition along the eastern margin of Proterozoic Australia from a passive to an active continental margin, and has potential for a range of mineral systems. The Curnamona Province is also prospective, with strong similarities and a large mantle conductivity anomaly joining it to the Gawler Craton, which hosts a world-class IOCG belt.


Preliminary resistivity models indicate a highly conductive crust in the Curnamona Province. Within the Delamerian Orogen, the lithosphere is mostly resistive, with isolated conductive anomalies from around 10 km down to the lower lithosphere. The Murray Basin that hinders mineral exploration over the southern parts of the Delamerian Orogen is imaged as a widespread shallow conductor.


Subduction-related crustal enrichment during the Delamerian Orogeny, identified by xenolith and seismic studies of eastern South Australia has, in part, been overprinted by the signature of recent volcanism in the form of the Newer Volcanic Province (NVP). The NVP, previously imaged by MT in Victoria, is now imaged in its full onshore extent. The new resistivity models will enable us to identify lithospheric scale structures and test tectonic models about the evolution of southeast Australia.


Presented to the American Geophysical Union (AGU) conference 9 – 13 December 2019, San Francisco

( https://www.agu.org/fall-meeting-2019)

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Identification info

Date (Creation)
2019-07-31
Date (Publication)
2024-10-01T03:46:08
Citation identifier
Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/130545

Cited responsible party
Role Organisation / Individual Name Details
Author

Robertson, K.

Co-author

Thiel, S.

Co-author

Kirkby, A.L.

Co-author

Heinson, G.

Co-author

Duan, J.

Co-author

Curtis, S.

Co-author

Wise, T.

Name

American Geophysical Union (AGU) conference 9 – 13 December 2019, San Francisco

Purpose

Abstract submitted to the American Geophysical Union (AGU) conference 2019

Status
Completed
Point of contact
Role Organisation / Individual Name Details
Resource provider

Minerals, Energy and Groundwater Division

External Contact
Point of contact

Commonwealth of Australia (Geoscience Australia)

Voice
Point of contact

Duan, J.

MEG Internal Contact
Spatial representation type
Topic category
  • Geoscientific information

Extent

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S
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W


Maintenance and update frequency
As needed

Resource format

Title

Product data repository: Various Formats

Protocol

FILE:DATA-DIRECTORY

Name of the resource

Data Store directory containing the digital product files

Description

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

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/

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License
Other constraints

© Commonwealth of Australia (Geoscience Australia) 2019

Resource constraints

Title

Australian Government Security ClassificationSystem

Edition date
2018-11-01T00:00:00
Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification
Unclassified
Language
English
Character encoding
UTF8

Distribution Information

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Commonwealth of Australia (Geoscience Australia)

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OnLine resource

Link to conference

Link to conference

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OnLine resource

Link to abstract

Link to abstract

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Statement

Abstract submitted to the American Geophysical Union (AGU) conference 2019

Metadata constraints

Title

Australian Government Security Classification System

Edition date
2018-11-01T00:00:00
Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification
Unclassified

Metadata

Metadata identifier
urn:uuid/7a090162-e7ea-4fc7-b7db-eab1b572a542

Title

GeoNetwork UUID

Language
English
Character encoding
UTF8
Contact
Role Organisation / Individual Name Details
Point of contact

Commonwealth of Australia (Geoscience Australia)

Voice
Point of contact

Duan, J.

MEG Internal Contact

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/130545

Metadata linkage

https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/5167d912-6784-4371-9938-3931e84ca6f1

Metadata linkage

https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/7a090162-e7ea-4fc7-b7db-eab1b572a542

Date info (Creation)
2019-04-08T01:55:29
Date info (Revision)
2019-04-08T01:55:29

Metadata standard

Title

AU/NZS ISO 19115-1:2014

Metadata standard

Title

ISO 19115-1:2014

Metadata standard

Title

ISO 19115-3

Title

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

Edition

Version 2.0, September 2018

Citation identifier
https://pid.geoscience.gov.au/dataset/ga/122551

 
 

Spatial extent

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S
E
W


Keywords

theme.ANZRC Fields of Research.rdf
EARTH SCIENCES

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