The subsurface mineralogy will be assembled using the ANVCL (http://www.auscope.org.au) “full-spectrum” HyLogging™ system’s and other spectral data (PIMA, ASD, HyChips™) provided by the sponsoring organisations. Key science challenges will be establishing the accuracy of derived mineral products through associated laboratory analysis, including investigations into the thermal infrared for measuring minerals such as quartz and alkali feldspars.
One of the main challenges using remote hyperspectral data is optimizing the processing methods for accurate, seamless mineral measurements at all available wavelengths (0.2 to 14 ?m). This requires solutions for unmixing background effects, such as green and dry vegetation, from target minerals to leave residual scaled mineral abundances equivalent to vegetation-free pixels. Another science challenge is to improve the atmospheric correction of aerosols which affects the accuracy of information regarding iron oxides in the visible and near infrared. A further challenge remains to prepare for the next generation of hyperspectral satellite systems and airborne full-spectrum sensors such as ARES, which will involve instrument and information product simulations and related calibration/validation.
This technology program has three key challenges: methods/software for accurate, seamless processing Terabytes of surface and subsurface spectral data, including error assessments; developing methods/software (e.g. GOCAD) for integrating, visualising, interpolating and assessing 3D mineral data; and building web-delivery systems compatible with the government geoscience agencies.
This research program has three main challenges: establishing 3D mineral product nomenclatures and standards (ISO compliant), including consistency of mineral information products from the surface to the subsurface and for the various instrument types; Building the necessary 3D seamless (interoperability) architecture between the specialist software packages (e.g. GOCAD™, FRACSYS™, LEAPFROG™, ENVI™, TSG-Core™, ARCGIS™); and building and delivering the 3D mineral maps of selected case histories into mineral systems architecture.
This program will use numerical modelling software (e.g. Geomodeller™) and 3D mineralogy to understand better the reactive transport processes of mineral systems. The outcome of this will be the generation of viable mineralisation models for effective exploration of BID and Archaean Au deposits in the complexly weathered environments of Western Australia
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