b'AEGC 2021Short abstractsimaging methods in this region can recover the younger covergold rich lodes strike roughly E-W towards a gold rich satellite sequences undermined by the basement. Tasmania hostsdeposit called Ngapakarra. In detail Cu-Au mineralisation is numerous significant minerals in the west/northwestern regionhosted by several generations of quartz-K feldspar-sulphide and owing to the Cambrian age Mount Read Volcanics (MRV). Thequartz-sulphide veins as well as sulphide rich breccias. Element Mt Lyell (Cu-Ag-Au), Henty (Au), Rosebery (Zn-Pb-Ag), Herculesassociations and vein and alteration textures and mineralogy (Zn-Pb-Cu-Ag-Au), Que River (Zn-Pb with subordinate Cu),classify Winu as an intrusion related Cu-Au deposit of Hellyer (Zn-Pb with subordinate Cu) and Fossey (Zn-Pb withNeoproterozoic age genetically related to an as yet unidentified subordinate Cu) mines are spread across this volcanic complex. granitoid pluton.The area of interest covers Yellow Marsh Road mines (about 10 km north of Hellyer Mine) which sit opposite Mt Cripps on146: CRC-P57322 High-resolution real-time airborne the other side of Belvoir Rd. It falls at the northern margin of the Dundas element, which is a 10-35 km wide belt zone betweengravimetryElliott Bay in the south and Deloraine in the north boundedDr Andrew Gabell 1, Dr Timothy Crain2, Dr Glenn D Hines3, Dr by Henty Fault (dipping east and having a displacement ofFarzin Amzajerdian3, Mr Bruce W Barnes3, Dr David Becker4, Ms 1.5 km) to its east. The underlying basement consists of LateHelen Tuckett1, Dr Jack McCubbine5, Mr Shaun Stewart2, Mr Proterozoic sequences. Permian strata are overlain by TertiaryGeoff Wells1, Mr Wayne Hewison1, Dr Andrew McGrath6, Prof Will beds dominated by basaltic lava flows. The first filling of theFeatherstone7, Mr Mathew Tubb8, Mr Scott Moore9 and Dr Jamin drainage by the basalts covered the bottom of the valleyGreenbaum10(deeper than 600 m from surface), on top of which many of the lava successions has been more clear and reached 400 m in1 Transparent Earth Geophysicsdepth. The volcanism was together with associated sedimentary2 Intuitive Machinessequences and mafic complexes. 3 NASA Langley Research Center4 pva-gThis project will conduct a 5 km by 4.5 km survey with 975 Geoscience Australiaseismometers in order to target the Paleozoic basement6 Airborne Research Australiaunderneath Tertiary basalts. This study is based on a dataset7 School of Earth and Planetary Sciences, Curtin Universityfrom a dense array combined with velocity profiles obtained8 Airship Solutionsfrom drill cores. The objective is to visualise how deep the9 Seequentbasaltic volcanic succession is, and thus where the mineralised10 Scripps Institution of Oceanography, University of California, Paleozoic basementis potentially accessible for exploration andSan Diegomining.The major limitation of airborne gravimetry stems from Einsteins equivalence principle, which prescribes that no 144: The Winu Cu-Au-Ag deposit in the Great Sandyinertial sensor can distinguish between spatial variations in the Desert of Western Australia gravity field (the signal) and variations in the acceleration of the aircraft (undesired noise). GNSS is currently used to determine Dr Hilke Dalstra the aircrafts inertial accelerations, which are then subtracted In the mid 2010s using a small porphyry style copper-goldfrom the total accelerations as measured by a gravimeter, to deposit near Telfer gold mine in the Paterson province ofdetermine the spatial variations due to gravity.Western Australia as an example Rio Tinto Exploration (RTX)The required accuracy is achieved by applying filters of saw an opportunity for discovery of a much larger tonnagethe order of 100 seconds to the GNSS data, resulting in a Cu-Au deposit under shallow cover in the Anketell Shelf,spatial resolution measured in kilometres. Advances in GNSS the northern continuation of the Paterson Province. RTXstechnology alone are unlikely to improve the resolution greatly.review of the Paterson Province identified three main areas of interest, each containing several selected targets. Of theseNASA Langley Research Center scientists developed a the Mtambo targets, initially defined based on geologicalNavigation Doppler Lidar (NDL) for the US Space Program. setting and aeromagnetic character were selected for furtherThis NDL measures velocities at the 1 mm/sec level in the geophysical surveys and drilling in December 2017. The firstlaboratory, so such devices may be able to measure the drillhole RC17PAW0001 which eventually turned out to beinertial accelerations of an aircraft much more accurately than the discovery hole intersected visible copper mineralizationis possible with GNSS. If so, determination of spatial gravity in a sequence of quartzites and siltstones all the way downvariations at significantly lower noise levels, or with improved to the end of hole at 174 m. Since then RTX has completedspatial resolution, or both, might be possible.more than 70 000 m of drilling and defined a maiden resource at Winu Central. More recently significant additionalCRC-P57322 High-resolution Real-time Airborne Gravimetry mineralisation has been drilled at Winu Southeast andwas funded by the Australian Government to investigate this Ngapakarra, approximately 2 km east of Winu. possibility. One of NASAs prototype NDLs was made available to the CRC-P project team, then integrated with state-of-Winu consists of at least four en-echelon left stepping Cu-Authe-art airborne scalar gravimeter systems to acquire data in lodes with strike lengths between 350 and 750 m, northerlythree airborne campaigns firstly in Utah, then twice in South trends and moderate easterly dips hosted in a sequence ofAustralia.massive sandstones and siltstones. The deposit structure is dominated by a gently SSE plunging inclined monocline with aThe CRC-P project demonstrated that it is possible to steep WSW-dipping western flank and a subhorizontal to gentlyconsistently produce gravity data with lower noise over repeat E-dipping eastern flank. In the southeastern part of Winu, twolines by including NDL data with GNNS and gravimeter data 87 PREVIEW AUGUST 2021'