Perilya's North Flinders Project aims to evaluate that region for potentially economic Beltana style zinc silicate mineralisation. Known deposits are relatively small (30% Zn), making them suitable to mine as Direct Shipping Ore (DSO). The deposits are typically found within reactive Lower Cambrian carbonate rocks, namely the Woodendinna Dolomite and Wilkawillina Limestone, in positions where these units are in fault contact with the underlying Neoproterozoic basement. Mineralisation appears to be structurally controlled, with evidence found of sustained episodic deposition, however, replacement textures within the host carbonates are rare. Deposits often show a spatial association with Callana Group diapiric breccias, as well as with karst voids developed in the host rocks, but a genetic link with these features has to date proved difficult to determine. Known deposits in the region are composed primarily of willemite, with minor amounts of smithsonite, coronadite and other hydrated, zinc-rich clay minerals. Alteration seen around the deposits is dominated by a strong haematisation of the host rocks, that imparts a pervasive reddish brown colouration to them, often to the point of visually masking the pale willemite mineralisation that is present. A successful bid was made in April 2016 for a grant of subsidy funds available under the SA Department of State Development’s PACE Discovery Drilling 2016 programme to test an inferred favourable setting for such mineralisation to occur, at a location near the western margin of the Arrowie Basin where the Cambrian strata thin and dip westwards under significant thicknesses of younger Tertiary and Quaternary sediments. The local geology consists of a thin, fault emplaced wedge of Cambrian strata juxtaposed against Proterozoic sandstones by a series of north-south trending fault structures. Reactivation of these structures during the Delamerian Orogeny caused zones of extension, and it was postulated that such zones may have provided the necessary accommodation space for emplacement of hypogene willemite mineralisation. During August-September 2016, 6 inclined RC holes with a total penetration of 494 m were drilled from three separate drilling pads on the Red Range prospect, to test beneath the northernmost three of four soil base metal anomalies previously detected by Perilya through 100 m spaced grid sampling and pXRF plus laboratory assaying that it did in 2013-2015. The total meterage achieved was ~318 m (39%) below plan owing to encountering more shallowly dipping strata than had been anticipated, as well as experiencing drilling difficulties which hampered penetrating very far into the underlying Proterozoic metasedimentary basement. No mineralisation considered to be of economic significance was intersected by the drilling. Results returned were similar to prior observations made of surface exposures, namely, a local chemostratigraphy consisting of broad zones of anomalous zinc (+/- lead) enrichment present within the Cambrian Woodendinna Dolomite and Parachilna Formation. The best mineralised intercepts were made in drillholes RRC005 and RRC006 put in at the Central drill pad, which intersected wide (>50 m) intervals of 1,000-10,000 ppm Zn in their drill cuttings, as indicated by pXRF analytical data. The highest laboratory assay values for drillhole samples were returned from holes RRC005 (1 m @ 1.14% Zn from 19 m downhole) and RRC008 (1 m @ 1.52% Zn from 37 m downhole). The drilling results have significantly downgraded the prospectivity of the Red Range area, however, the potential for economic mineralisation to occur somewhere along the ~6 km strike length of target strata cannot be completely discounted, given the ~1 km spacing between drilled sections. Future work will include major and trace element assaying of selected samples from the 2016 programme, as well as detailed geological and structural mapping in the southernmost target area.