b'Conferences and eventsNewsdata and actual pre-strip excavationSecondly, because the theoreticallymineral deposit styles at Emmie Bluff depths reinforces the predictive, butlinear function is non-linear due torequire deep geophysical targeting using qualitative, mapping capability of theFe-silicates, and self-demagnetisationa combination of gravity and magnetic AEM. It also highlights the need to tuneeffects, mineralogy is cross-checkedsurvey data analysis, which was used to the modelling via petrophysics for theagainst geochemical data andtarget deep drilling on the Emmie Deeps specific goal of the investigation andself-demagnetisation effects areIOCG discovery, as well 2D multi-channel exposes the limitations of visual drill coreincorporated into modelling. Non- seismic reflection and MT surveying, logging. uniqueness is addressed by utilisingbecause surface IP and EM surveying petrophysical and depth constraintswill not penetrate to target depth. Geophysics will probably notfrom drilling and calibration modelling. Historical ground MT, recent AusLAMP match the drill hole, Chris Wijns. ground MT, and helicopter borne Mobile MagResource utilises physics toMT survey data have been acquired at invert a magnetic field that is scalarEmmie Bluff and underwent 1D, 2D and Manganese and geophysics atto the resource. Therefore, spatially3D conductivity inversion, including joint Woodie Woodie representative sampling is non- inversion of ground based and Mobile requisite. Sampling that spans theMT survey data sets, all of which provided Gemma King, Consolidated Minerals range of susceptibilities and magnetitehighly variable results. The recently contents defines the gradient ofacquired 2D seismic reflection survey In 2017, an updated geological andmagnetic susceptibility: Iron, whichdata underwent detailed re-processing structural model was published forin-turn converts the modelled magneticusing drilling constraints to produce hydrothermal manganese at Woodiemoment into contained iron. Quantifyinghigh resolution depth-migrated sections Woodie. Geophysics played an importantiron resources using 99% non-invasivehighlighting subtle sedimentary features role during the development of thetechnology drastically reducesand structures in the Neoproterozoic model, in particular interpretation of theexploration expenditure and can definebasin sediments. In the underlying wealth of historical data and progressionresources faster with fewer cultural andcrystalline bedrock, the seismic reflection of new ideas using a collaborativeenvironmental impacts. geometry varied dramatically between approach. The Canyon deposit is andifferent data processing workflows, example of integrating geophysics,Geophysics is spatiallyshowing that great caution is required structure, geology, and geochemistryrepresentative, Jim Austin. when interpreting hard rock seismic data to understand complexities insets. Drillhole logging and wireline data hydrothermal manganese explorationconfirm that flat conductive layers in MT and resource definition. Deep geophysical targeting formodelling results are caused by saline Dont be afraid to rely on theIOCG and shale-unconformitygroundwaters in the Whyalla Sandstone hosted Cu-Co-Ag deposits atsitting directly above the Tapley Hill tried and tested techniques thatFormation shale, and continuous seismic work for your mineralisation,Emmie Bluff in South Australia reflection horizons extending east from Gemma King. Jayson Meyers1, Sharna Riley1, Alexanderthe drilled Tapley Hill Formation provided Costall1, & Matthew Weber2 strong drilling targets that turned out to be an unconformity with the Tapley Hill Geophysically constrained resource1Resource Potentials Pty Ltd, 2Codamissing or unmineralised, showing that definition of the BurracoppinMinerals Limited great looking geophysical results can Magnetite deposit Emmie Bluff is located along the westernbe ambiguous when deep targets are drilled, and therefore new approaches to Jim Austin, CSIRO margin of the Gawler Craton in the Stuartdeep targeting need to be developed.Shelf region of South Australia and Magnetite has characteristic densitycontains both a deep shale-unconformityGeophysical data should be and magnetic properties which contrasthosted Cu-Co-Ag sedimentaryprocessed in a way that honours strongly with common rocks/minerals.replacement deposit in the flat-lyinggeology, Jayson Meyers.Provided magnetite grains withinNeoproterozoic Tapley Hill Formation, a resource have relatively uniformat an average depth of 400 m (43 Mt grainsize and composition and sitat 1.8% Cu-eq), and formed in isolated within a background of uniform density,basins along the western margin of theThe discovery of the Jericho magnetite, iron content, density, andAdelaide Geosyncline / Fold and ThrustISCG depositfollowing the (except at high concentrations) magneticBelt, and just to the west in underlyingbreadcrumbssusceptibility have approximately linearcrystalline basement rocks a recently relationships. The MagResource methoddiscovered Iron Oxide Copper GoldAndrew Thompson, Oz Mineralsutilises this linearity to infer Iron content(IOCG) deposit with strong Cu sulphide from geophysical models. mineralisation starting at approximatelyThe Jericho ISCG deposit was discovered 800 m depth, hosted in hydrothermallyapproximately 4 km from the Eloise Whilst theoretically simple, severalaltered Paleoproterozoic metamorphicMine in NW Queensland as part of issues must be addressed to accuratelyand granitic rocks forming part of thea Joint Venture between Minotaur infer iron content. Firstly, to ensureOlympic Dam Copper province, and withExploration (now Demetallica) and Oz data are integrable, petrophysicalmineralisation likely occurring at aroundMinerals in October of 2017. The deposit, properties and mineralogy arethe same time as the regional IOCGhosted within the Paleoproterozoic measured on identical volumes.mineralising event at ca 1.59 Ga. BothMount Norna Quartzite unit, part of FEBRUARY 2023 PREVIEW 16'