Magnetotellurics – Imaging Lithospheric Architecture and Linking to Mineral Potential
The Australian Lithospheric Architecture Magnetotelluric Project (AusLAMP) is a collaborative national survey that acquires long-period magnetotelluric data on a half-degree grid spacing (approximately 55 km) across the Australian continent. This project aims to map the electrical conductivity/resistivity structure in the crust and mantle beneath the Australian continent. Geoscience Australia has a significant investment in AusLAMP and is a key contributor to the delivery of this national program.
Geoscience Australia, in partnership with State and Northern Territory Geological Surveys, has also undertaken regional-scale MT surveys, along onshore deep reflection seismic transects and in potential mineral and energy provinces across the country. The targeting signal range is 10 KHz – 1000 s, which provide an investigation depth from tens of metres to tens of kilometres. These data provide new insights into basement architecture and resource potential in these regions.
We will present some new models and results from AusLAMP data and regional survey data, showing a remarkable correlation between conductive anomalies, crustal-scale boundaries and the distribution of giant mineral deposits. For example, the Carpentaria Conductivity Anomaly at the eastern margin of the Mount Isa Province characterises the position and geometry of the ancient Gidyea Suture Zone. The distribution of known gold and copper deposits shows a close spatial correlation with the suture zone, indicating that this structure is potentially a fundamental control on IOCG deposits in its vicinity. The implication is that crustal-penetrating structures act as potential pathways for fluid movement to form mineral deposits in the upper crust.
This Abstract was submitted/presented to the Biennial Meeting of the Specialist Group for Tectonics and Structural Geology (SGTSG) and the Specialist Group in Solid Earth Geophysics (SGSEG), Convergence on the Coast, 18-22 November 2019 Port Lincoln, South Australia
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- Date (Creation)
- 2019-07-29
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- 2023-02-17T01:47:12
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- Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/130503
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Role Organisation / Individual Name Details Author Jiang, W.
MEG Internal Contact Author Duan, J.
MEG Internal Contact Author Kyi, D.
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Biennial Meeting of the Specialist Group for Tectonics and Structural Geology (SGTSG) and the Specialist Group in Solid Earth Geophysics (SGSEG) 18-22 November 2019 Port Lincoln SA
- Purpose
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Abstract to present at the Specialist Group for Tectonics and Structual Geology (SGTSG) and the Specialist Group in Solid Earth Geophysics, Convergence (SGSEG) on the Coast, 18-22 November 2019
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Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Point of contact Jiang, W.
MEG Internal Contact Resource provider Minerals, Energy and Groundwater Division
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Product data repository: Various Formats
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EARTH SCIENCES
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4.0
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Australian Government Security ClassificationSystem
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Abstract presented at the Specialist Group for Tectonics and Structual Geology (SGTSG) and the Specialist Group in Solid Earth Geophysics, Convergence (SGSEG) on the Coast, 18-22 November 2019
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Australian Government Security Classification System
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- 2018-11-01T00:00:00
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Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Point of contact Jiang, W.
MEG Internal Contact
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Conference Abstracts
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Geoscience Australia - short identifier for metadata record with
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- Date info (Creation)
- 2019-07-29T03:05:32
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- 2019-07-29T03:05:32
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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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Geoscience Australia Community Metadata Profile of ISO 19115-1:2014
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Version 2.0, September 2018
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- https://pid.geoscience.gov.au/dataset/ga/130503