Multicommodity Mineral Systems Analysis Highlighting Minerals and Diamond Prospectivity in the Halls Creek Orogen, WA

Understanding regional minerals prospectivity is essential for opening up greenfields regions to effective exploration. We have completed a multicommoditiy mineral systems analysis on the Halls Creek Orogen, which was used as a basis for the production of semi automated prospectivity models. Known mineral deposits formed over a 2 billion year period, which was dominated by, but not restricted to Paleoproterozoic orogenesis and basin formation. The work has demonstrated a link between key prospectivity model components and the propensity of disparate styles of mineral deposits to occur in this region, which has not been documented before. A link between major crustal-scale faults or shear zones and the location of known ore deposits and occurrences in the area has been established. Many structures are either newly discovered, or their extension through the upper crust and down to the MOHO has just been established, and their crust-scale suggests they are sites of fluid migration. Of these structures, orogen perpendicular (northwest trending) and orogen oblique (north trending) faults seem to be the most influential structures with respect to ore deposition, especially in regions where they intersect each other, or other major structures.