b'Geophysics in the SurveysNewsGeological Survey of Western Australia: Regional and crustal-scalegeophysical programmes in 2019Since 2009, the Government of Westerntransects across key geological regionsat 20 km line spacing to cover most Australias ongoing Explorationof the State. of northern Western Australia. Incentive Scheme (EIS) has enabledThe deep seismic transects are beingData acquisition is in progress with the Department of Mines, Industrycomplemented with EIS-fundedestimated completion in November Regulation and Safetys (DMIRS)reprocessing of legacy government2019 (www.ga.gov.au/eftf/minerals/Geological Survey of Western Australiaand exploration company seismicnawa/ausaem). GSWA and GA are (GSWA) to extend its programme ofdata. Reprocessed data from anpresently considering the viability regional and crustal-scale geophysicalaggregate 2 852 km along 66 lines(funding-dependent as always) of data acquisition projects throughout thefrom 11 surveys in the Canning,extending the AusAEM programme State. Carnarvon and northern Perth Basinsto cover the remainder of Western These projects are an integral componentwere released in February 2019.Australia as part of an ambitious of GSWAs strategy to enhance WesternNew reprocessing projects are undercountry-wide programme.Australias precompetitive and public- consideration. New stations have been added to use information-base with state- GA has extended its Exploring forthe broad-spectrum passive seismic wide surface-to-mantle geosciencethe Future AusAEM programme ofnetwork (AusARRAY) and the long information at the best resolutionbroad-reconnaissance AEM traversesperiod magnetotelluric (MT) network affordable.Figure 1 illustrates the variety and extent of existing datasets, and the current geophysical programmes that GSWA is undertaking with active assistance from its national counterpart, Geoscience Australia (GA), and leveraging support from a number of other international, national and state institutions.Since the last publication of this graphic in the AEGC 2018 conference issue of Preview 192 in February 2018, the following new work has been completed or is underway:Airborne gravity surveys at 2.5 km line spacing over the Kimberley and central Canning Basins in 2018 (Preview 197, December 2018; data released in April 2019), and in the Pilbara in 2019 (Preview 200, June 2019). The Pilbara survey essentially brings to completion GSWAs objective to create a second-generation gravity coverage of the state, with up to 16 times higher resolution than the first generation gravity coverage of the Australian continent by GAs predecessor, the Bureau of Mineral Resources, Geology and Geophysics between 1959 and 1975. Preliminary data were released in July (Figure 2). The gravity coverage complements the airborne magnetic and radiometric coverage of the state at sub-500 m line spacing.A GSWA/GA jointly funded 872 km seismic transect across the Kidson Sub-basin (data released in May 2019, Figure 3) has added to the repository of crustal-scale reflection seismicFigure 1.Regional and crustal-scale geophysical programmes in Western Australia in 2019.AUGUST 2019 PREVIEW 14'