EL 3972 Apoinga is located within the northern Mount Lofty Ranges, where bedrock comprises Proterozoic rocks of the Adelaide Fold Belt. The main prospect area within EL 3972 is the Tarnma Anticline, a N-S trending fold which is cored by Skillogalee Dolomite. This structure is believed to represent an unbreached diaper-related anticline that lies in a favourable regional structural setting, between the historic copper mining centres of Burra to the north and Kapunda to the south. Copper Range, in concert with its US-based geological consultant Dr Jon Thorson, has developed a new conceptual exploration model to use for finding sediment-hosted copper mineralisation within the Adelaide Fold Belt, which targets areas where a reductant-bearing fluid has ponded against a suitable structural or stratigraphic trap. Any influx of copper-bearing fluid could then precipitates copper sulphides in a porous sandstone horizon. An unbreached anticline, such as at Tarnma, provides a target fitting this model because fluid flow-through of saline brines there would have been significantly retarded, and fluid escaping from compacting sediments may have been focused into the core of such a structure, with only slow leakage along minor fracture zones. Such a scenario would allow fluids to pond within structural and stratigraphic traps, and accommodate the collection of several pulses of fluid expulsion, increasing the availability of both reductant and subsequent copper-bearing fluid as these each are prevented from flowing out of the system. During the first licence year, Copper Range undertook reconnaissance visits to the Tarnma Anticline area, while also investigating known copper and gold occurrences within the tenement area. An initial rock chip sampling programme (19 samples collected) was focussed on the core of the anticline where evidence of slow leakage of siliceous fluids is apparent. The results of this sampling programme show elevated copper values of up to 411 ppm Cu associated with ferruginisation and silica alteration of the dolomitic bedrock. This was regarded as encouraging evidence that circulating fluids may have formerly been trapped within underlying Rhynie Sandstone. During licence Year 2, the company prepared a prospectivity report on the Tarnma Anticline target, which recommended performing further, intensive surface and subsurface geochemical sampling of the Skillogalee Dolomite with accompanying geological mapping, to identify in particular places where the dolomite is cut by NE-trending structures. This detailed appraisal work would assist with effective siting of drillholes. Discussions were held with potential joint venture partners. No other field work was done on the subject licence before the decision was recently made to fully surrender its tenure.