Warburton East, Warburton West, Great Victoria Desert, Kimberley Basin, Little Sandy Desert East and Little Sandy Desert West Gravity Surveys, 2018

In 2018, Sander Geophysics Limited (SGL) conducted six fixed-wing high-resolution gravimetric surveys for Geoscience Australia and the Geological Survey of Western Australia. Over two hundred flights were flown to complete the planned 175,825 line kilometres, with five blocks acquired within 800 km to the northeast of Laverton and one block within 500 km to the west of Kununurra (Kimberley Basin block). The survey was flown with two aircraft utilising SGL’s airborne gravity system, Airborne Inertially Referenced Gravimeter (AIRGrav). The survey was funded by the Department of Mines, Industry Regulation and Safety (DMIRS) Western Australia, and managed by Geoscience Australia. Survey Name: Warburton East, Warburton West, Great Victoria Desert, Kimberley Basin, Little Sandy Desert East and Little Sandy Desert West Gravity Surveys, 2018State/Territory: Western AustraliaDatasets Acquired: Airborne gravity, elevationGeoscience Australia Project Numbers: P1312, P1313, P1315, P1316, P1317, P1318 (in the survey order above) Acquisition Start Date: 27 April 2018Acquisition End Date: 04 October 2018Flight line spacing: 2,500mFlight line direction: East-West for Sandy Desert East and West, Kimberley Basin and Warburton East surveys, North-South for Warburton West and Great Victoria Desert surveysTie line spacing: 25,000 mTie line direction: Orthogonal to flight linesNominal terrain clearance: Smoother drape with nominal 160 m terrain clearanceTotal distance flown: 175,825 kmData projection: MGA51 or MGA52 using the GDA94 datumAircraft type: Fixed wing Cessna Grand Caravan 208BData Acquisition: Sander Geophysics LimitedProject Management: Geoscience AustraliaQuality Control: Geoscience AustraliaDataset Ownership: Western Australia Department of Mines, Industry Regulation and Safety, and Geoscience Australia Data package for the 6 sub surveys:- Contractors Report (combined)- Line data in XYZ and ASEG GDF format- Read me files of datasets- Quality control reports for each survey area- Gridded data with details below GRIDS==============Datum: GDA94Projection: MGA 51 or MGA 52 Grid cell size: 500mFormats: Grid Exchange File (.gxf) and ERMapper (.ers) Name Units Description-------------- --------- ----------------------------------------------GRVFAL5000M µms-2 Free air gravity, 5000 m (#) full wavelength spatial filterFVDFAL5000M Eotvos First vertical derivative of free air gravity, 5000 m (#) full wavelength spatial filterGRVBGL5000M_267 µms-2 Full Bouguer gravity, 5000 m (#) full wavelength spatial filter, 2670 kg/m3 densityFVDBGL5000M_267 Eotvos First vertical derivative of full Bouguer gravity, 5000 m (#) full wavelength spatial filter, 2670 kg/m3 densityGRVISO5000M_267 µms-2 Isostatic residual gravity, 5000 m (#) full wavelength spatial filter, 2670 kg/m3 densityFVDISO5000M_267 Eotvos First vertical derivative of isostatic residual gravity, 5000 m (#) full wavelength spatial filter, 2670 kg/m3 densityTERRAIN m Laser terrain (above GDA94 Ellipsoid)BAREEARTH m Bare earth terrain (above GDA94 Ellipsoid)---------------------------------------------------------------------------------------------------------- # 5000 m wavelength filter employed for all projects other than Little Sandy Desert West where a 2500 m wavelength filter was employed instead. Read contractors report for more details ----------------------------------------------------------------------------------------------------------