U-Pb zircon geochronology of the Nuyts Volcanics yielded an age of 1627 +/- 2 Ma, supporting a previous dating of 1631 +/- 3 Ma. The major and trace element compositions, as well as the presence of a tectonic fabric, suggest that the Nuyts Volcanics...

This Report Book contains zircon U-Pb geochronological data obtained between December 2006 and June 2007, for rock samples derived from the Gawler Craton of South Australia. The geochronological study was undertaken as part of the National Geoscience...

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...

The geology of the Lake Gilles locale in the south-west of the PORT AUGUSTA 1:250k map sheet area is poorly understood. Outcrop of basement rocks there is sparse, and typically occurs along the margins of the salt lake, where it is highly weathered....

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The major units present are Middle Proterozoic leucogranites, alkali granites and porphyries, overlain by Pleistocene Bridgewater Formation. Leucogranites contain up to 10% phenocrysts of potassium feldspar and bluish quartz, alkali granites contain...

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The YARDEA 1:250,000 scale regional geological map area straddles the southern margin of the Gawler Ranges on northern Eyre Peninsula. The only major township within the area is Minnipa, with Kimba and Wudinna both located immediately south of the...

The KIMBA 1:250 000 geological map sheet (hereafter referred to as KIMBA) lies in central Eyre Peninsula, extending between latitudes 33° to 34° S and longitudes 135° to 136°30'E (Fig 1). The principal towns are Kimba and Cleve, with smaller towns at...

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,...