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Gawler Craton Airborne Survey Merge Magnetics - TMI pseudocolor image (AWAGS)

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Created 14/01/2025

Updated 14/01/2025

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Total magnetic intensity (TMI) data measures variations in the intensity of the Earth's magnetic field caused by the contrasting content of rock-forming minerals in the Earth crust. Magnetic anomalies can be either positive (field stronger than normal) or negative (field weaker) depending on the susceptibility of the rock. The data are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose. . This Gawler Craton Airborne Survey Merge Magnetics - TMI pseudocolor image (AWAGS) is a pseudocolour image of the TMI grid of the Gawler Craton Airborne Survey Magnetic Radiometric and DEM Merge, SA, 2017-2019 survey. The grid used to produce this image has a cell size of 0.0004 degrees (approximately 41m). The data used to produce the TMI grid was acquired in 2017-2019 by the SA Government, and consisted of 1660000 line-kilometres of data at 200m line spacing and 60m terrain clearance. To constrain long wavelengths in the grid, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey grid. This survey grid is essentially levelled to AWAGS. This pseudocolour image shows the magnetic response of subsurface features with contrasting magnetic susceptibilities. The image can also be used to locate structural features such as dykes.

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Title Gawler Craton Airborne Survey Merge Magnetics - TMI pseudocolor image (AWAGS)
Language eng
Licence notspecified
Landing Page https://devweb.dga.links.com.au/data/dataset/ee69fd58-ebce-4d33-a023-22609deb1328
Contact Point
Geoscience Australia
clientservices@ga.gov.au
Reference Period 01/01/2019 - 01/01/2019
Geospatial Coverage {"type": "Polygon", "coordinates": [[[130.9839, -32.6745], [138.0123, -32.6745], [138.0123, -27.3437], [130.9839, -27.3437], [130.9839, -32.6745]]]}
Data Portal data.gov.au

Data Source

This dataset was originally found on data.gov.au "Gawler Craton Airborne Survey Merge Magnetics - TMI pseudocolor image (AWAGS)". Please visit the source to access the original metadata of the dataset:
https://devweb.dga.links.com.au/data/dataset/gawler-craton-airborne-survey-merge-magnetics-tmi-pseudocolor-image-awags

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