Authors / CoAuthors
Jiang, W. | McAlpine, S.R.B. | Duan, J.
Abstract
The Coompana Project is a collaborative project between Geoscience Australia (GA) and the Geological Survey of South Australia (GSSA), which aims to provide new precompetitive geological, geophysical and geochemical data in the under-explored Coompana Province in South Australia. The pre-drilling geophysics program was undertaken to assist the drilling process by reducing the uncertainty associated with intersecting the targeted stratigraphy. Firstly, the magnetotellurics (MT) technique was tested at six sites where previous drill holes were located to benchmark the application of MT method with respect to estimating cover thickness in the region. Comparison with drill-hole details indicates that the method is capable of identifying major stratigraphic structures and providing cover thickness estimates with a reasonable accuracy (within 10%). Subsequently, MT data were acquired at eight proposed drilling sites in February 2017. 1D and 2D data modelling were undertaken using different algorithms to improve confidence level. Finally, estimates of the cover thickness with specified uncertainty at proposed drilling sites are produced. This report presents MT data acquisition and processing, data inversion and preliminary interpretation of model results. Limitations and uncertainty associated with the MT technique is discussed.
Product Type
document
eCat Id
112981
Contact for the resource
Author
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Resource provider
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Digital Object Identifier
Keywords
- Australian and New Zealand Standard Research Classification: Fields of Research
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- Earth Sciences
- ( {1} )
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- HVC_144686
- ( Discipline )
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- Magnetotelluric
- ( Theme )
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- Geophysics
- ( Place )
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- Coompana Province
- ( {1} )
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- Published_External
Publication Date
2017-12-05T03:45:06
Creation Date
2017-12-05T00:00:00
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notPlanned
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geoscientificInformation
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Record 2017/019
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[-31.8, -30.5, 129, 130.5]
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