The Lake Woorong exploration licence, situated about 80 km south-west of Coober Pedy, covers portions of the Palaeoproterozoic Coober Pedy Ridge, an east-northeast trending magnetic block of variable magnetic intensity which separates the Mount Woods Inlier to the south-east from the Mabel Creek Inlier to the north. The exploration undertaken there by licensee Hiltaba Gold was focussed on defining non- to weakly magnetic iron oxide - associated copper-gold (IOCG) style mineralisation within concealed Proterozoic basement lithologies. The majority of past exploration drilling carried out within this region had been within the Coober Pedy Ridge terrain of high temperature metamorphic rocks, but Hiltaba Gold noted that limited drilling to basement in areas to the south of this terrain had encountered metasomatic magnetite and igneous intrusions indicative of an IOCG mineral system genetic environment, associated with the 'Balta' granite suite that outcrops in the Mount Woods area. An interpretation of available aeromagnetic data , plus basement modelling and the application of known geophysical responses over the Prominent Hill and Carrapateena prospects to the Coober Pedy Ridge structural setting, defined two areas within EL 3436 that were considered to be worthy of investigation by semi-detailed gravity surveys. 279 gravity stations were read on a 400 m x 400 m grid at the Woorong prospect during October 2005, and the resulting gravity data defined a 3-4 mGal gravity high covering a 300 m x 500 m area. This target, with an interpreted depth to basement of 150 m, lies on an interpreted regional NW trending fault, and is located immediately to the east of an isolated low order magnetic anomaly. 367 gravity stations were read on a 200 m x 200 m grid at the Lonesome prospect during late September 2005, and the resulting gravity data defined an off-set gravity anomaly of approximately 5 mGal amplitude lying parallel to and approximately 800 m north of a significant magnetic trend; here the association between magnetic and gravity responses was noted as being similar to that observed at Prominent Hill. Depth to basement was interpreted as 100 m. A proposal for grant of a PACE Initiative subsidy to help fund drill testing of the Woorong and Lonesome gravity targets was submitted to and accepted by PIRSA in mid-2006. The PACE-sponsored drilling took place during October-December 2006 as project DPY3-46, the work comprising five rotary mud precollared diamond core drillholes totalling 765.6 m, which included 269.2 m of basement coring. No rock types regarded as being consistent with either the Carrapateena or Olympic Dam styles of IOCG mineralisation were encountered by this drilling, although some encouraging epithermal alteration was observed. Instead, the drillholes penetrated metamorphosed felsic intrusives and older metasedimentary rocks that are overprinted by calc-silicate - dominant alteration, the dense rocks containing predominantly amphibole, feldspar, garnet and quartz, plus minor magnetite and trace sulphides. An extensive regional gravity survey was conducted for new licence operator Red Metal during November 2006, when 2110 stations were acquired on 400 m centres to define additional shallow targets for future drilling. Several untested discrete, low amplitude residual gravity anomalies were identified, and these were further outlined with infill gravity coverage (232 stations) during October-November 2007. Selected IOCG target gravity anomalies were tested by Red Metal in May 2008, when 4 vertical RC percussion holes were drilled for a total penetration of 467 m. This drilling, the execution of which was hindered by high groundwater flows coming from within the Algebuckina Sandstone just above basement, encountered garnet-rich gneiss carrying some metasomatic magnetite. No anomalous downhole sample assay results were returned. After Red Metal left the joint venture in January 2009, no further work was done on the subject licence during its Year 4, and the licensee failed to apply to renew it for a fifth year within the required claim period, so tenure was deemed to have lapsed. Shortly afterwards, an application to PIRSA for the grant of a new, replacement exploration licence was submitted by Hiltaba Gold late in October 2009. However, at this time the Commonwealth Department of Defence chose to deny ongoing access for mineral exploration onto much of the Woomera Prohibited Area , including all of the area comprising Hiltaba Gold's EL application, because it lay within a recently defined "Core zone of operations". No real progress in negotiations to regain the land access had been made at the time of last report.