Mintabie Opalfield, one of the most important production centres in Australia, was discovered in the early 1920s but mining only began in earnest in 1976. Precious opal is confined to Mintabie beds, a kaolinitic sandstone of presumed Ordovician Age,...

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The Geological Survey of South Australia has partnered with MinEx CRC to undertake a National Drilling Initiative project in the northern Gawler Craton. This project includes a geoscientific drilling program and allied research to understand the...

This publication has been compiled from a display prepared for the launch of SADME Bulletin 53, held at the Australian Mineral Foundation on 7 December 1987. The importance and diversity of commodities found in the Geosyncline are highlighted in the...