The Geological Survey of South Australia commissioned the Gawler Craton Airborne Survey (GCAS) as part of the PACE Copper initiative. The airborne geophysical survey was flown over parts of the Gawler Craton in South Australia. The program was designed to capture new baseline geoscientific data to provide further information on the geological context and setting of the area for mineral systems (http://energymining.sa.gov.au/minerals/geoscience/pace_copper/gawler_craton_airborne_survey).
The survey design of 200 m spaced lines at a ground clearance of 60 m can be compared with the design of previous 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.
Survey blocks available for download include:
Streaky Bay, block 5
Gairdner, block 6A
Spencer, block 7
Kingoonya, block 9B
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
