Product catalogue
Conductivity Model Derived from Magnetotelluric Data in the East Tennant Region, Northern Territory
<p>The footprint of a mineral system is potentially detectable at a variety of scales, from the ore deposit to the Earth’s crust and lithosphere. In order to map these systems, Geoscience Australia has undertaken a series of integrated studies to identify key regions of mineral potential using new data from the Exploring for the Future program together with legacy datasets.
<p>The recently acquired long-period magnetotellurics (MT) data under the national-scale AusLAMP project mapped a lithospheric scale electrical conductivity anomaly to the east of Tennant Creek. This deep anomaly may represent a potential source region for mineral systems in the crust.
In order to refine the geometry of this anomaly, high-resolution broadband and audio MT data were acquired at 131 stations in the East Tennant region and were released in Dec 2019 ( http://dx.doi.org/10.26186/5df80d8615367). We have used these high-resolution MT data to produce a new 3D conductivity model to investigate crustal architecture and to link to mineral potential. The model revealed two prominent conductors in the resistive host, whose combined responses link to the deeper lithospheric-scale conductivity anomaly mapped in the broader AusLAMP model.
The resistivity contrasts coincide with the major faults that have been interpreted from seismic reflection and potential field data. Most importantly, the conductive structures extend from the lower crust to near-surface, strongly suggesting that the major faults are deep penetrating structures that potentially act as pathways for transporting metalliferous fluids to the upper crust where they can form mineral deposits. Given the geological setting, these results suggest that the mineral prospectivity for iron oxide copper-gold deposits is enhanced in the vicinity of the major faults in the region.
<p>This release package includes the 3D conductivity model produced using ModEM code in sGrid format and Geo-referenced depth slices in .tif format.
Simple
Identification info
- Date (Creation)
- 2020-03-12T11:00:00
- Date (Publication)
- 2020-03-23T00:03:02
- Citation identifier
- Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/135011
- Citation identifier
- Digital Object Identifier/https://dx.doi.org/10.26186/135011
- Cited responsible party
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Role Organisation / Individual Name Details Publisher Commonwealth of Australia (Geoscience Australia)
Voice Author Jiang, W.
Author Duan, J.
- Status
- Completed
- Point of contact
-
Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Point of contact Jiang, W.
Resource provider Minerals, Energy and Groundwater Division
- Spatial representation type
- Topic category
-
- Geoscientific information
Extent
))
- Maintenance and update frequency
- As needed
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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HVC_144686
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- theme.ANZRC Fields of Research.rdf
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EARTH SCIENCES
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- Discipline
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geophysics
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- Sub-Topic Category
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magnetotellurics
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- Theme
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EFTF
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- {1}
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Published_External
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- Project
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Exploring For The Future
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- Project
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East Tennant
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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
-
4.0
- Access constraints
- License
- Use constraints
- License
Resource constraints
- Title
-
Australian Government Security ClassificationSystem
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Associated resource
- Association Type
- Cross reference
- Title
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East Tennant Magnetotelluric Survey, Northern Territory, Australia
- Citation identifier
- 132016
- Citation identifier
- b123934b-9f88-4a01-b88a-e873b09e5116
Associated resource
- Association Type
- Cross reference
- Title
-
Probabilistic Inversion of Audio Magnetotelluric Data in the East Tennant region, Northern Territory, Australia
- Citation identifier
- 144339
- Citation identifier
- 0ed8959a-0e59-489d-ad88-2035aa9ce64b
- 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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Download the depth slices (tif) [25.8 MB]
Download the depth slices (tif) [25.8 MB]
- Distribution format
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tif
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- OnLine resource
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Download the model files (sGrid) [19.4 MB]
Download the model files (sGrid) [19.4 MB]
- Distribution format
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sGrid
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- OnLine resource
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Download the readme file (pdf) [43.9 KB]
Download the readme file (pdf) [43.9 KB]
- Distribution format
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pdf
- File decompression technique
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nil
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Resource lineage
- Statement
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Geoscience Australia has undertaken integrated studies to identify key regions of mineral potential using new data from Exploring for the Future and legacy data. In July and August 2019, broadband and audio MT data were acquired at 131 stations in the East Tennant region. We have used the high resolution MT data to investigate crustal architecture and to link to mineral potential.
Metadata constraints
- Title
-
Australian Government Security Classification System
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Metadata
- Metadata identifier
-
urn:uuid/bce5dc4e-db8d-4611-a117-923ce2c9fdef
- 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 Jiang, W.
Type of resource
- Resource scope
- Model
- Name
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Conductivity Model
Alternative metadata reference
- Title
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Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
- eCatId/135011
- Date info (Creation)
- 2020-03-11T22:39:43
- Date info (Revision)
- 2020-03-11T22:39:43
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
-
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/135011