An area of the western Yorke Peninsula, comprising three separate sub-blocks, was taken up to explore for possible economic buried IOCG-U deposits similar to those at Hillside (located 25 km to the east of sub-block 'B'), Olympic Dam, Prominent Hill and Carrapateena; as well as exploring for shear zone - hosted massive sulphide copper-gold deposits like those found in the nearby Moonta-Wallaroo district, 20 km to the north of sub-block 'A'. The licence ground was selected because it was interpreted to contain Palaeoproterozoic basement metasedimentary and metavolcanic rocks intruded by Hiltaba Suite granites, and because it might contain a number of south-westerly orientated faults splaying off the proven prospective Pine Point Fault Zone, which runs in a north-south direction along the eastern side of the Yorke Peninsula. Work performed during the first licence year included conducting a desktop review of previous exploration reports and available geophysical data, some limited two-dimensional modelling of aeromagnetic data, and compilation of previous mapping, drilling, magnetic and gravity information into a GIS database to facilitate geological and geophysical interpretation. No field work was conducted by new licence operator Core Exploration during the second year of tenure. A study was made of likely geological and structural factors controlling the newly discovered Hillside IOCG skarn type deposit of Rex Minerals, situated not too far away on the eastern side of the peninsula. During January 2011, Core acquired a detailed, 3023 line km low level helimag / helirad airborne survey across the entire tenement, along east-west flight lines spaced 100 m apart, using a mean sensor height above the ground surface of 30 m. Starting later in 2011, a semi-detailed ground gravity survey was acquired over three regular square 500 m x 500 m grids on each of the separate licence sub-blocks, using the same contractor, with some subsequent grid infill to 250 m x 250 m station spacing being read in the southern sub-block (Area 3). Additional stations were surveyed along roads and tracks outside of the main survey grids to provide extra coverage. Total coverage was 1575 new stations. The magnetic and gravity surveys clearly defined a northeast-southwest trending structural zone with a number of coincident magnetic and gravity anomalies contained within it. These coincident anomalies are also elongated north-eastwards, suggesting that they were present pre-deformation. The anomalies were interpreted by Core as areas of potential accumulation of an iron-rich mineralising fluid which may have been transported along the shear zones during or post-deformation, this fluid being tapped from similar fluids originating in the Pine Point Fault, which the splay zone intersects on the eastern side of the peninsula. A program of soil geochemical sampling was conducted over the same grid as used by the gravity survey, with 852 samples being assayed for copper, lead and zinc. However, the results obtained made it clear to Core that muted pathfinder element dispersions due to the substantial thickness of cover, besides the widespread presence of old mine waste rock used in local road construction, had rendered this method an unreliable exploration tool. During August 2011, Core performed a first pass drilling program to test the upper few metres of the buried basement at two of the identified coincident geophysical anomalies. 41 vertical aircore holes were completed for a total penetration of 3636 m. The depth of hole drilling required to reach basement was found to be more than expected, up to 150 m in many places, with loose gravel and sand beds commonly being encountered at depth, which sediments freely entered the holes and blocked the aircore drill string. This situation meant that only 6 holes were eventually able to penetrate the basement. It was observed that the Permian diamictites that overlie basement contain many, presumed locally derived clasts of basement, including granite and quartzite, with sulphide (bornite) identified in a rounded clast recovered from 100 m depth in drillhole YPAC020. During licence Year 4, Core completed a diamond drilling program during February 2012, that comprised 8 vertical or angled holes for 2010.1 m, before performing some follow up ground geophysical surveys. Six targets were tested using two drill rigs, with a single hole put into each of five targets, plus the remaining three into the Wauraltee Prospect. All of the targeted geophysical anomalies were explained by the drilling, where mafic dolerites to gabbros are likely sources controlling the majority of the coincident magnetic and gravity anomalies. The most encouraging drilling results came from the Wauraltee prospect holes, which encountered pervasively altered granite within a high strain shear zone, this rock carrying minor pyrite and chalcopyrite mineralisation disseminated within an alteration vein assemblage of veinlets and veins up to 20 cm wide consisting of albite + epidote + carbonate ± hematite and magnetite. The alteration assemblage is consistent with the higher temperature magnetite-dominant end of the IOCG system petrological composition range, rather than resembling an assemblage that is characteristic of lower temperature hematite-rich IOCG deposits. This attribute matches the style of alteration found at Hillside to the east and across the historic Moonta – Wallaroo copper-gold mining district. Whilst a few of the drill core sample assay results were noteworthy (best intercept 1 m @ 0.45% Cu in hole WTDD001), they did not reveal significant thicknesses or grades of copper-gold mineralisation. The most encouraging aspect was thought to be finding the pervasive alteration in granite with mineralised veins that have good potential to host undiscovered more significant mineralisation. Hole WTDD007 intersected the contact between an intrusive granite and country rock metasediments showing evidence of skarn mineral assemblages. Strong, sub-vertical mineral alignment fabrics were observed in a number of the drill cores, and they were interpreted to be consistent with the regional magnetic orientations. During April 2012, at the Wauraltee prospect and at three other locations, Core acquired 2621 new infill ground gravity readings on a closed-in grid spacing of 50 m x 50 m, and also acquired 25 line km of complementary ground magnetic profiles. Also during this year, but prior to commencing its diamond drilling, Core decided to attempt to directly detect IOCG mineralisation beneath the cover using an airborne electromagnetic (AEM) survey. The company successfully applied for a SA Government grant of $50,000 made available through the PACE 2020 Targeting mineral exploration subsidisation module, to help defray the cost of running this survey [see Env 12367 for the final report on PACE Targeting Project PT1-05]. On 2nd December 2011, contractor Geotech Airborne flew 327 line km with its Versatile Time Domain Electromagnetic (VTEM) helicopter-borne survey instrumentation platform across the entire southernmost portion of EL 4177, along 62 east-west lines spaced 200 m apart, maintaining a 49 m mean terrain clearance of the VTEM transmitter/receiver loop configuration. Subsequent interpretation of the AEM data revealed a lack of obvious anomalism and pervasive effects due to highly conductive cover which overall served to mask any basement-sourced late-time EM responses. Two minor north-south trending AEM anomalies were noted on the composite Tau map, that might possibly represent good basement conductors, but were not considered significant enough to constitute drill targets. It is believed that they probably reflect saline groundwater which has infiltrated weathered basement along faults, since neither anomaly has an associated magnetic and/or gravity feature. Consequently, core's previously selected drill targets were not changed to reflect the AEM survey outcome. During Licence Year 5, Core continued to review its drilling and geophysical information, and decided that it would in future explore geophysical targets having subtle differences to the coincident magnetic and gravity targets so far drilled, by focussing instead on offset dual gravity/magnetic anomalies and on discrete lone gravity anomalies. During the passage of licence Years 6 to 9, the only activity conducted was a continuing search for joint venture partners to co-fund further diamond drilling on the untested gravity targets within the subject renewed EL 5320, which activity, in the prevailing mineral exploration market conditions, proved fruitless. Accordingly, a decision was eventually made in 2017 to allow tenure to lapse.