Sulfide and oxide trace element geochemical analyses have been conducted on more than 290 core chip samples collected from stored drill cores of 39 drillholes located across South Australia, as part of a collaborative project being conducted between the Centre for Ore Deposit and Exploration Science (CODES), University of Tasmania, and the Geological Survey of South Australia. The project aim was to analyse the mineral chemistry of pyrite, hematite and magnetite across a range of deposit styles in SA, and determine whether the technique could be used to provide insights into, and vector within, the various mineral systems. Results suggested that pyrite chemistry can be used to successfully distinguish between IOCG, hydrothermal breccia, MVT and sedimentary copper deposits. However, pyrite trace element compositions from both orogenic gold and Au-magnetite skarn deposits partially overlap with those present in these other deposit styles. Magnetite, although present in fewer of the deposit types compared to pyrite, was nonetheless able to yield compositional data that accurately discriminate between IOCG and Au-magnetite skarn deposits. A case study was made of six drillholes from the GSSA's Mineral Systems Drilling Program. It was concluded that, based on pyrite geochemistry alone, the area around hole MSDP12 may be considered to have the most prospectivity for economic magmatic-hydrothermal mineralisation. A further case study was made of seven diamond cored holes from company exploration carried out recently at the Intercept Hill prospect, which is located near the Emmie Bluff IOCG mineral deposit. Trace element analyses of 512 individual crystals derived from 30 drill core samples revealed fascinating and complex sulphide and oxide mineral parageneses. Also, halite-hematite intergrowths were discovered which are presumably Mesoproterozoic in age; this finding is regarded as very significant and highly relevant to the origin of IOCG mineralisation in the Gawler Craton and beyond. Furthermore, the prevalence of gold-rich pyrite over a large area at Intercept Hill (extending for ~3 km between IHAD1 and IHAD5) suggests proximity to a large (potentially world-class) magmatic-hydrothermal system.