the Gawler Craton covers over 40 percent of the State in area and contains the world class Olympic Dam copper-gold-uranium deposit, which contributes significantly to Government revenue via royalties and direct and indirect employment. The Gawler Craton is located within the central zone of South Australia and incorporates a wide variety of land use from cereal cropping, grazing, National Parks and small areas of mining activity (i.e.. Olympic Dam iron ore mines, opal prospects etc.). Mineral exploration on the Gawler Craton contributes to State revenue and is an important measure of economic activity and investment confidence within the State. The Geological Survey Branch of the Minerals and Energy Division of PIRSA has targeted the Gawler Craton as one of three areas in the State with the highest chance of new mineral development and assessment. The giant Olympic Dam deposit occurs within the Gawler Craton and this one deposit alone contributes significantly to the State's GSB and regional development. Further discoveries are possible within the Gawler Craton and the Geological Survey is charged with providing pre-competitive data to accelerate company activity as well as facilitating scientifically valid land use decisions. The Woomera Prohibited Area (WPA) covers approximately 127000 km2 of the central Gawler Craton region of South Australia. The WPA is administered by the Commonwealth Department of Defence and is primarily used for government weapons testing and trials and commercial launcher trials. The land in the eastern two thirds of the WPA is owned predominantly by the South Australian Government with some small areas owned by the commonwealth. The western portion is owned by the Maralinga Tjarutja people with a small parcel to the north owned by the Anangu Pitjanjatjara people. Land use in the western WPA is dominated by the Aboriginal lands and also includes the Tallaring Conservation Park. The eastern WPA consists of a number of pastoral leases and a small number of mining leases. The terrain in the WPA is generally flat, and is characterised by a mixture of stone covered 'gibber' plains, large sandy areas and normally dry salt lakes. Vegetation typically comprises low saltbush and other desert shrubs, with areas of trees reaching a height of around four meters. The area of the WPA takes in significant proportions or completely 14 250K maps sheets. This report discusses the potential for as yet undiscovered mineral resources within the WPA. The WPA is considered as very prospective for a wide range of mineral commodities including gold, nickel, copper, platinum group elements (PGE), lead, zinc, iron ore, uranium and heavy minerals.