b'Geophysics in the surveysNewsGeological Survey of Queensland: Newly released airborne data and MTsurvey in the North West Mineral ProvinceThe Geological Survey of Queensland has recently completed two new geophysical programmes in the Mount Isa Region. The Central Isa airborne magnetic and radiometric survey was released in late September, and data for the Cloncurry Extension Magnetotelluric (MT) survey will be released by the end of the year.The Central Isa airborne magnetic and radiometric survey is the fourth in a series of higher resolution regional surveys covering parts of the Mount Isa region at line intervals of 100 m or lower. The survey consists of 88 000 line km of data that was acquired at 100 m line spacing with a 60 m terrain clearance and provides new high-resolution coverage in the area to the north and east of Mount Isa. The logistics report, DEM, magnetic and radiometric geodatabase as well as a collection of grid files (TMI, RTP, 1VD, K/Th/U/Dose) and GeoTIFF files are all available for download from the new GSQ Open Data Portal (https://geoscience.data.qld.gov.au/magnetic/mg001391). We will be covering the new open data portal and how to find data in a future Preview article.The Central Isa survey adjoins other recent high-resolution regional survey conducted by the GSQ including the Cloncurry North (2018), Cloncurry South (2017) and Mary Kathleen (2017). These new surveys show a marked improvement in data quality compared to the previous Mount Isa Mines Open Range survey acquired in the early 1990s. The data for these surveys, and some large open-file exploration surveys, have been used to form a large high-resolution merge.The Mount Isa Airborne Data Merge 2020 covers ~30 000 km2 of the North Figure1.Reduced to pole magnetic intensity grid (overlain with first vertical derivate greyscale) of Mount West Mineral Province (Figure 1). The merge covers the region from Mount IsaIsa Airborne Data Merge 2020 product. The extents of the newly released Central Isa Airborne survey are in the west, well past Cloncurry in theshown in black outline.east, and runs from Cannington Mine inwas used as a base map in the mergingThe dataset contains a set of merged ers the south up to near Capricorn Copperprocesses, while the other grids weregrid files (TMI, RTP, 1VD, K/Th/U/Dose/in the north. The merging of the gridsshifted, scaled and surface adjusted toDEM) and GeoTIFF files and is available was performed in Intrepid GridMergeensure a neat merge. As the originalfor download through the open data using the gridded data from sevengrids have been scaled and adjustedportal (https://geoscience.data.qld.gov.different airborne surveys. As a firstto facilitate this merging process, itau/dataset/ds000057).step all input grids were re-projectedis suggested that any highly detailed to GDA2020 Map Grid of Australia Zoneinterpretation be performed on theThe Cloncurry Extension MT Survey 54 (ESPG: 7854). During the merge theoriginal grid products rather than theis located north of the township of 1990-1992 MIM Open Range surveyregional merge. Cloncurry, in the Eastern Succession of 23 PREVIEW DECEMBER 2020'