Argonaut Resources NL announce that the drilling rig has arrived on site to commence drilling at the giant Torrens copper-gold anomaly at Lake Torrens in South Australia. The Torrens anomaly is a complex series of magnetic and gravity anomalies with a footprint larger than that of Olympic Dam. The anomaly is located over the Torrens Hinge Zone, a continent-scale zone of crustal weakness that appears to have been a conduit for mineralising fluids from the Earth's mantle. Drilling of the Torrens anomaly by Western Mining Corporation in the late 1970s and by the Torrens Joint Venture in 2007 and 2008 confirmed the existence of a major iron oxide copper-gold mineralising system beneath several hundred metres of sedimentary cover. More drilling is required to intercept the modelled copper-gold mineralisation. In the event of a discovery, Torrens has the potential to host a world-class copper-gold deposit.