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Cover Thickness Estimates in the Coompana Province, South Australia: Benchmarking and results from the pre-drilling geophysics program - Magnetotellurics

Created 17/10/2025

Updated 17/10/2025

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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.

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Title Cover Thickness Estimates in the Coompana Province, South Australia: Benchmarking and results from the pre-drilling geophysics program - Magnetotellurics
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/c87de79a-d15e-4c7b-88e7-c5ca98d19325
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        129.0,
        -31.8
      ],
      [
        130.5,
        -31.8
      ],
      [
        130.5,
        -30.5
      ],
      [
        129.0,
        -30.5
      ],
      [
        129.0,
        -31.8
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Cover Thickness Estimates in the Coompana Province, South Australia: Benchmarking and results from the pre-drilling geophysics program - Magnetotellurics". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/cover-thickness-estimates-in-the-coompana-province-south-australia-benchmarking-and-results-fro