Metallic exploration from 1970 and the geology of central Yorke Peninsula, (Maitland and Stansbury 1:100 000 sheet areas) are summarised. The principal companies involved were North Broken Hill, Aquitaine Australia Minerals, BHP / Dampier Mining, CRAE, Esso Exploration / Pegmin / Otter Exploration and Poseidon Ltd. The principle metallic targets were Moonta Cu-Au vein and Olympic Dam Cu-Au-U style deposits in the Proterozoic basement, and carbonate-hosted lead-zinc, and sedimentary uranium respectively in the Lower Cambrian limestones and Tertiary clastics cover sediments. Tertiary and Quaternary cover is extensive and most exploration involved geophysics, including magnetics, electrical methods and local seismic, as well as extensive auger / RAB drilling. Aquitaine conducted a program of systematic mapping of the Cambrian carbonates in the vicinity of Curramulka. No deposit of economic significance was discovered, although anomalous grades were encountered by drilling in the Weetulta Dome near Balgowan (BHP / CRAE), a possible extension of the Moonta Province. The mineralisation at Weetulta was considered to have alkaline carbonatitic affinities and similar alteration was encountered in a skarn near Port Julia. Potential remains for Cambrian carbonate-hosted lead-zinc deposits along faults connecting with the basal Cambrian Weetulta Formation, for vein, skarn and diatreme related deposits in the basement, and for gold in the Winulta Formation and in the basal Tertiary fluviatile gravels.