Product catalogue
The Southern Thomson Orogen VTEMplus® AEM Survey: Using airborne electromagnetics as an UNCOVER application
The Southern Thomson Orogen VTEMplus® AEM survey was undertaken as part of Geoscience Australia's contribution to the Australian Academy of Science's UNCOVER initiative, which has been adopted as part of the Australia Government's National Mineral Exploration Strategy. The aim of the survey was to demonstrate the application of AEM as an exploration tool under cover by generating new data and information regarding depth to basement and cover character. This information is provided to mineral explorers to assist reducing exploration risk by better targeting of drilling in the greenfields southern Thomson Orogen region.
This report provides a background to the survey, including reviews of the basement and cover geology and mineral systems potential of the southern Thomson Orogen. We present the specifications of the airborne survey, and detail the innovative processing and inversion techniques that have been developed and applied to the AEM data. These inversion innovations have enabled the generation of higher precision information from the AEM data, resulting in higher confidence in geological and geophysical interpretations of the basement-cover interface and overlying basin stratigraphy.
Data interpretation methods are presented, followed by a series of case studies demonstrating the effectiveness of the technique for identifying and mapping resistive basement, for characterising cover sequences, for mapping weathering products and for mapping post-depositional structures. The process and results of basement-cover interface mapping are presented along with conductivity characterisation and recognition of key stratigraphic (and hydrostratigraphic) units within the Eromanga and Lake Eyre basin cover sequences. Interpretation of a potential mineral system in resistive basement is discussed, and the utility of the technique for assessing the distribution and depth of weathering in basement rocks, along with interpretation of tectonic features, are also assessed.
The application of AEM as a basement and cover mapping tool are clearly demonstrated and the potential utility of such techniques for reducing exploration risk in greenfields regions is clear. In the southern Thomson Orogen interpreted AEM data has the potential to assist in targeting exploration and drilling for shallowly-buried basement-hosted mineral systems to 150-200 m and in exploring for distal footprints within the overlying basin cover sequences.
Simple
Identification info
- Date (Publication)
- 2015-01-01T00:00:00
- Edition date
- 2015-01-01T00:00:00
- Citation identifier
- Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/83844
- Citation identifier
- Digital Object Identifier/http://dx.doi.org/10.11636/Record.2015.029
- Cited responsible party
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Role Organisation / Individual Name Details Publisher Geoscience Australia
Canberra Author Roach, I.C.
1 Author McPherson, A.A.
2 Author Clarke, J.D.A.
3 Author Brodie, R.C.
4 Author Doublier, M.P.
5 Author Armistead, S.E.
6 Author Skirrow, R.G.
7 Author Main, P.T.
8
- Name
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Record
- Issue identification
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2015/029
- Point of contact
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Role Organisation / Individual Name Details Custodian RD
Owner Commonwealth of Australia (Geoscience Australia)
Custodian Commonwealth of Australia (Geoscience Australia)
Voice
- Topic category
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- Geoscientific information
Extent
))
- Maintenance and update frequency
- Not planned
Resource format
- Title
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Product data repository: Various Formats
- Website
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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
- Keywords
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GA Publication
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Record
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- Keywords
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NSW
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QLD
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- Australian and New Zealand Standard Research Classification (ANZSRC)
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Earth Sciences
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- Keywords
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Published_External
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Resource constraints
- Title
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Creative Commons Attribution 4.0 International Licence
- Alternate title
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CC-BY
- Edition
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4.0
- Access constraints
- License
- Use constraints
- License
Resource constraints
- Title
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Australian Government Security ClassificationSystem
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
- Language
- English
- Character encoding
- UTF8
Distribution Information
- Distributor contact
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Role Organisation / Individual Name Details Distributor Commonwealth of Australia (Geoscience Australia)
Voice
- OnLine resource
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File download
Download the record (docx)
- Distribution format
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docx
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- OnLine resource
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File download
Download the record (pdf)
- Distribution format
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pdf
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Resource lineage
- Statement
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Unknown
- Hierarchy level
- Non geographic dataset
- Other
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GA Publication
- Description
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Source data not available.
Metadata constraints
- Title
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Australian Government Security ClassificationSystem
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Metadata
- Metadata identifier
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urn:uuid/18870967-faf7-3086-e053-12a3070a8c4c
- Title
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GeoNetwork UUID
- Language
- English
- Character encoding
- UTF8
- Contact
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Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice
Type of resource
- Resource scope
- Document
- Name
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GA Record
Alternative metadata reference
- Title
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Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
- eCatId/83844
- Date info (Revision)
- 2018-04-20T06:03:58
- Date info (Creation)
- 2015-06-15T00:00:00
Metadata standard
- Title
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AU/NZS ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-3
- Title
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Geoscience Australia Community Metadata Profile of ISO 19115-1:2014
- Edition
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Version 2.0, September 2018
- Citation identifier
- https://pid.geoscience.gov.au/dataset/ga/122551