A suite of intrusives (St Peter Suite - new name) along western Eyre Peninsula displays a wide range in composition, texture and relationships. The features are typical for mingling and mixing of felsic and mafic magmas, with U-Pb geochronology...

Brief description of sampling procedures and sites. All samples analysed by semi-quantitative spectrographic method for precious and rare earth elements. Results in appendix.

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...

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...

Mapping and sampling of 39 adits at Mongolata Goldfield has ensured that a permanent record of the 1930s mines is available for historical and exploration purposes. Many of the workings are no longer accessible. Details of the production history of...

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,...