A small licence area centred ~ 28 km south-southeast of Yunta which consists of two separate sub-blocks is being explored for possible economic stratabound iron ore mineralisation that could occur within buried glacial tillitic/siltstone strata of the Neoproterozoic Braemar Ironstone, beneath sparse but persistent poor outcrops of this bedrock unit. On the now relinquished westernmost portion of the licence ground, comprising 25% of the originally grant area, work performed by the licence operator has entailed stream sediment sampling of creek bed detrital ironstone-rich sediments, for laboratory analysis to determine their magnetite content. The surface rock geochemistry was analysed in the first instance with a portable XRF spectrometer and, later on, 16 selected samples were crushed and subjected to Davis Tube Recovery (DTR) yield tests of their magnetite, which gave an average iron content in the separated magnetic mineral concentrates which was less than the >62% Fe grade required for marketability. A method was devised for calibrating the XRF spectrometric instrument to obtain better accuracy of this affordable form of measurement of the iron content in separated heavy magnetic mineral concentrates. Changes were also made to the raw material mineral separation method in order to try to extract more of the iron, the aim being to generate a +62% Fe concentrate that can later be made into 100 kg bulk samples for supply to potential clients.