b'Geophysics in the surveysNewsGeological Survey of South Australia: Update on activities planned for 2023Gawler Phase 2 gravity data available nowThe data and report for the Gawler Phase 2 (GP2) gravity survey has been released on the South Australian Resources Information Gateway (SARIG: https://map.sarig.sa.gov.au/). This regional gravity survey contains over 5500 new gravity observations in central South Australia, covering the region around and between the Challenger gold mine and the Jacinth-Ambrosia mineral sands mine. Measurements were taken every 2 x 2 km over a large grid, with about half of the measurements being part of a detailed 1 x 1 km infill area around the Challenger mine and prospective area to the south.The gravity data shows hitherto unseen geological features including palaeochannels, glacial paths andFigure 1.The 1VD of the new gravity data highlighting geological features interpreted to be shear zones (Figure 1). Combinedpalaeochannels, glacial paths, and shear zones.with other geophysical datasets, the Geological Survey of South Australia are constructing a more robust geological history of the area. Data are also incorporated into the state-wide gravity grid (along with other newly released public domain surveys). We anticipate the new state grid will be ready for download in early 2023.Conducted under the GP2 next generation minerals system mapping project, the survey is the result of over a year of planning. Land access negotiations with the Antakirinja Matu-Yankunytjatjara Aboriginal Corporation (AMYAC), Far West Coast Aboriginal Corporation (FWCAC) and the Maralinga Tjarutja Council commenced in late 2021. The AMYAC land in the survey area has numerous pastoral leases on it, and the AMYAC board voted to have monitors accompany the gravity survey team. The FWCAC was originally keen for monitors in their portion of the survey, but due to logistical challenges settled on flying over the survey area to identify any potentially sensitive sites. The Maralinga Council voted against the survey being undertaken on their lands resulting in around 400 sites being dropped from the original plan. A request for quote was organised via SA Tenders to select a surveying company to undertake the gravity acquisition in late 2021, and a plan for environmental protection and rehabilitation wasFigure 2.SA gravity 2023 (top left); SA gravity 2023 1VD (top right); SA gravity UC1000 residual (bottom approved in mid-2022. left) and SA gravity 2023 nominal station spacing (bottom right).29 PREVIEW FEBRUARY 2023'