Sander Geophysics Limited (SGL) conducted a fixed-wing high resolution airborne gravimetric survey over two survey blocks, Pilbara Northwest and Pilbara Southeast in Northwestern Australia for Geoscience Australia and its partner the Geological Survey of Western Australia (GSWA).
The traverse lines were oriented east-west in the Pilbara Northwest block and north-south in the Pilbara Southeast block and spaced at 2500 m. A limited number of control lines flown exclusively in the Pilbara Northwest block were oriented north-south and spaced at 50,000 m. A drape surface was created taking into account the terrain and the performance of the aircraft at the expected altitudes and estimated temperatures. The survey was flown with a target clearance of survey 160m above ground level.
Survey details
Survey Name: Pilbara WA airborne gravity surveys 2019
State/Territory: Western Australia (WA)
Datasets Acquired: Airborne gravity
Geoscience Australia Project Number: P1314
Acquisition Start Date: April 23, 2019
Acquisition End Date: June 16, 2019
Flight line spacing: 2500m
Flight line direction: 270deg / EW (Pilbara NW); 180deg / NS (Pilbara SE)
Control line spacing: 50,000m – Pilbara NW only
Control line direction: 180 deg / NS – Pilbara NW only
Total line kilometers: 69,943
Nominal terrain clearance (above ground level): 160m
Aircraft type: Cessna Grand Caravan 208B
Data Acquisition: Sander Geophysics Limited
Project Management: Geoscience Australia
Quality Control: Geoscience Australia
Dataset Ownership: GSWA and Geoscience Australia
This data package release contains the final survey deliverables received from the contractor SGL, and peer reviewed by Dr Mark Dransfield.
1. Point-located Data / line data
ASCII XYZ and ASEG-GDF2 format with accompanying description and definition files.
2.Grids in General eXchange Format (.gxf) and ERMapper format (.ers)
Datum: GDA94
Projection: MGA 50
Grid cell size: 500m
A full wavelength spatial filter of 5000m was applied to all the gravity grids. See details in the readme files.
- Readme files
- PNW-readme-grav.txt
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PSE-readme-grav.txt
-
Reports
- Final survey logistic report (Pilbara SE and NW) from the contractor: P1314_Pilbara_2019_TR-878-000.pdf
- Pilbara NW survey QC report by M Dransfield: Pilbara NW AG QC report.pdf
- Pilbara SE survey QC report by M Dransfield: Pilbara SE AG QC report.pdf
The data from this Pilbara survey are also available for download from https://geoview.dmp.wa.gov.au/GeoView under reference number 71470.
