Data

Gawler Craton Airborne Survey Magnetics / Radiometrics / DEM Tranche 2

Name: Gawler Craton Airborne Survey Magnetics / Radiometrics / DEM Tranche 2
Published: 2019

Geoscience Australia

Kroll, A. ; Hutchens, M. ; Goodwin, J.A.

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ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=https://pid.geoscience.gov.au/dataset/ga/132176&rft.title=Gawler Craton Airborne Survey Magnetics / Radiometrics / DEM Tranche 2&rft.identifier=https://pid.geoscience.gov.au/dataset/ga/132176&rft.publisher=Geoscience Australia&rft.description=The Geological Survey of South Australia (GSSA) designed the Gawler Craton Airborne Survey (GCAS) to provide high resolution magnetic, gamma-ray and elevation data covering the northern portion of the Gawler Craton. In total, 1.66 million line km were planned over an area of 295,000 km2 , covering approximately 30% of the state of South Australia. The survey design of 200 m spaced lines at a ground clearance of 60 m can be compared with the design of existing regional surveys which generally employed 400 m line spacing and a ground clearance of 80 m. The new survey design results in ~2 x the data coverage and ~25% closer to the ground when compared to previous standards for regional surveys in South Australia. Due to the enormous scale of the survey, the data were acquired using four contractors who employed ten systems to fly the sixteen blocks. To standardise the data from the multitude of systems, Geoscience Australia (GA) employed a comprehensive set of technical specifications. As part of these specifications the contractors were required to fly each of the ten systems over a series of test lines termed the “Whyalla Test Lines” (Whyalla). The final GCAS data provide truly impressive high resolution regional scale products. These will allow more detailed geological interpretation of the prospective Gawler Craton. Survey blocks available for download include: Tallaringa North, block 1A Tallaringa South, block 1B Coober Pedy West, block 8A Billa Kalina, block 8B Childara, block 9A Lake Eyre, block 10 The following grids are available in this download: • Laser-derived digital elevation model grids (m). Height relative to the Australian Height Datum. • Radar-derived digital elevation model grids (m). Height relative to the Australian Height Datum. • Total magnetic intensity grid (nT). • Total magnetic intensity grid with variable reduction to the pole applied (nT). • Total magnetic intensity grid with variable reduction to the pole and first vertical derivative applied (nT/m). • Dose rate concentration grid (nGy/hr). • Potassium concentration grid (%). • Thorium concentration grid (ppm). • Uranium concentration grid (ppm). • NASVD processed dose rate concentration grid (nGy/hr). • NASVD processed potassium concentration grid (%). • NASVD processed thorium concentration grid (ppm). • NASVD processed uranium concentration grid (ppm). The following point located data are available in this download: • Elevation. Height relative to the Australian Height Datum. Datum: GDA94 • Total Magnetic Intensity. Datum: GDA94 • Radiometrics. Datum: GDA94Maintenance and Update Frequency: asNeededStatement: Data was acquired by Thomson Aviation and Magspec Airborne Surveys. Funding was supplied under the PACE initiative. Databases were supplied by Thomson Aviation and Magspec Airborne Surveys. Grids were gridded using a minimum curvature method by Geoscience Australia using the databases delivered by the acquisition companies.&rft.creator=Kroll, A. &rft.creator=Hutchens, M. &rft.creator=Goodwin, J.A. &rft.date=2019&rft.coverage=westlimit=131.00; southlimit=-32.665; eastlimit=138.00; northlimit=-27.35; projection=GDA94 / MGA zone 53 (EPSG:28353)&rft.coverage=westlimit=131.00; southlimit=-32.665; eastlimit=138.00; northlimit=-27.35; projection=GDA94 / MGA zone 53 (EPSG:28353)&rft_rights=&rft_rights=Creative Commons Attribution 4.0 International Licence&rft_rights=CC-BY&rft_rights=4.0&rft_rights=http://creativecommons.org/licenses/&rft_rights=Australian Government Security ClassificationSystem&rft_rights=https://www.protectivesecurity.gov.au/Pages/default.aspx&rft_rights=WWW:LINK-1.0-http--link&rft_rights=Creative Commons Attribution 4.0 International Licence http://creativecommons.org/licenses/by/4.0&rft_subject=geoscientificInformation&rft_subject=PHYSICAL SCIENCES&rft_subject=EARTH SCIENCES&rft_subject=Magnetics&rft_subject=Gawler Craton&rft_subject=Radiometrics&rft_subject=DEM&rft_subject=Airborne Geophysics&rft_subject=Published_External&rft.type=dataset&rft.language=English Access the data

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Australian Government Security ClassificationSystem

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Brief description

The Geological Survey of South Australia (GSSA) designed the Gawler Craton Airborne Survey (GCAS) to provide high resolution magnetic, gamma-ray and elevation data covering the northern portion of the Gawler Craton. In total, 1.66 million line km were planned over an area of 295,000 km2 , covering approximately 30% of the state of South Australia. The survey design of 200 m spaced lines at a ground clearance of 60 m can be compared with the design of existing regional surveys which generally employed 400 m line spacing and a ground clearance of 80 m. The new survey design results in ~2 x the data coverage and ~25% closer to the ground when compared to previous standards for regional surveys in South Australia. Due to the enormous scale of the survey, the data were acquired using four contractors who employed ten systems to fly the sixteen blocks. To standardise the data from the multitude of systems, Geoscience Australia (GA) employed a comprehensive set of technical specifications. As part of these specifications the contractors were required to fly each of the ten systems over a series of test lines termed the “Whyalla Test Lines” (Whyalla). The final GCAS data provide truly impressive high resolution regional scale products. These will allow more detailed geological interpretation of the prospective Gawler Craton. Survey blocks available for download include: Tallaringa North, block 1A Tallaringa South, block 1B Coober Pedy West, block 8A Billa Kalina, block 8B Childara, block 9A Lake Eyre, block 10 The following grids are available in this download: • Laser-derived digital elevation model grids (m). Height relative to the Australian Height Datum. • Radar-derived digital elevation model grids (m). Height relative to the Australian Height Datum. • Total magnetic intensity grid (nT). • Total magnetic intensity grid with variable reduction to the pole applied (nT). • Total magnetic intensity grid with variable reduction to the pole and first vertical derivative applied (nT/m). • Dose rate concentration grid (nGy/hr). • Potassium concentration grid (%). • Thorium concentration grid (ppm). • Uranium concentration grid (ppm). • NASVD processed dose rate concentration grid (nGy/hr). • NASVD processed potassium concentration grid (%). • NASVD processed thorium concentration grid (ppm). • NASVD processed uranium concentration grid (ppm). The following point located data are available in this download: • Elevation. Height relative to the Australian Height Datum. Datum: GDA94 • Total Magnetic Intensity. Datum: GDA94 • Radiometrics. Datum: GDA94

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Maintenance and Update Frequency: asNeeded

Statement: Data was acquired by Thomson Aviation and Magspec Airborne Surveys. Funding was supplied under the PACE initiative. Databases were supplied by Thomson Aviation and Magspec Airborne Surveys. Grids were gridded using a minimum curvature method by Geoscience Australia using the databases delivered by the acquisition companies.

Notes

Purpose
Point located and gridded aeromagnetic, radiometric and digital elevation model data.

Created: 12 2019

Issued: 09 12 2019

Data time period: 2017-01-19 to 2019-06-25

This dataset is part of a larger collection

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text: westlimit=131.00; southlimit=-32.665; eastlimit=138.00; northlimit=-27.35; projection=GDA94 / MGA zone 53 (EPSG:28353)

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Identifiers

global : cf49f698-ac05-446b-8f50-93edb592864a
URI : pid.geoscience.gov.au/dataset/ga/132176
DOI : 10.26186/5DED9C897793A

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Gawler Craton Airborne Survey Magnetics / Radiometrics / DEM Tranche 2

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