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This discordant dyke related to kimberlite and carbonatite intrusions has been emplaced at a low temperature into Umberatana Group shales and siltstones. Its composition is unsuitable for use in manufacturing glass and ceramics due to both low...

Since 1950, recorded production from ICI's Penrice marble deposit near Angaston has totalled 13,083,395 tonnes. High grade marble is used at the company's Osborne plant, while lower grade stone is sold for cement manufacture and roadstone, and small...

The southern portion of the Mount Painter Inlier contains large volumes of granitic breccia of uncertain origin. 3 vertical exploratory diamond drillholes were sited near Mount Gee and Mount Painter to determine the depth of this breccia, and to...

Small inlier of lower Ordovician rhyodacite in Baker Range in the South-East is an important source of road sealing aggregate. 750 000 tonnes of rhyodacite are inferred to underlie 220 000 tonnes of overburden. Diamond and rotary drilling is recommended.

Specimens from the Mt Grainger Goldfield include quartzites, sandstones in which kaolinite is believed to represent earlier feldspar, siltstones, shales, diamictites of probable glaciogene origin, granitoids and andesites. Low to moderate temperature...

This SADME stratigraphic drillhole has intersected high grade Precambrian basement gneisses at 691.33 metres depth below a sequence of unmetamorphosed arenaceous and rudaceous sediments of the ?Cambrian Murnaroo Sandstone. Evidence from the clasts in...

Thermally altered argillites and mobilised rocks of anomalous compositions have been attributed to the burning of coal seams in the Triassic succession deposited in the small synclinal 'Springfield' Basin. Some aspects of this explanation appear...

Late Archaean / Early Proterozoic foliated massive granites, adamellites and granodiorites of the Dutton Suite (Sleaford Complex) probably represent Sleafordian Orogeny intrusives. Price Island and Golden Island are composed of metasiltstone...

Kyanite has been concentrated in early to middle Proterozoic Willyama Supergroup regionally metamorphosed mica kyanite schist by late stage contact metamorphic recrystallization. Based on 1950 - 1963 investigations for refractory grade material,...

42 rock specimens collected from the open cut at Burra were examined in order to comment on a report received from a consulting organisation. Despite a high degree of alteration evident in the samples, it was possible to distinguish microscopically,...

Scoriaceous glass partly of sedimentary origin was identified as possible member of the Truro Volcanics.

Rocks examined in thin section are significant in indicating possible nature of concealed basement under the Eucla Basin, as well as in dating events in Archaean and Proterozoic.

Rocks are mainly from the Middle Proterozoic Gawler Range Volcanics. One may be from the Tarcoola Beds and one, not identified as it is too strongly altered by contact metamorphism, is of economic interest because of its highly mafic character.

No production reported from the mine sited on granite equated with Hiltaba Granite. Based on sampling and mine inspection, mine has very low base metal potential.

Heterogeneous collection of rocks includes granitoids, gneisses, volcanic rocks and siliceous sediments. In the latter category are quartzites, banded iron formations and silicified stromatolites.

Rocks include acid volcanics, probably of the Gawler Range Volcanics except for 1 which may be earlier, granitoids, syenite, banded iron formation of 2 types, siliceous sediments ranging from conglomerate to chert, dolomite, clay and probable mylonite.

2 porphyritic basalt samples of Jurassic age from near Kingscote are composed mainly of labradorite and an augite which is pigeonitic. Zoned pyroxene phenocrysts contain a core of orthorhombic pyroxene which is identified as enstatite.

Rocks include samples of drill core and cuttings from BHP and Esso drillholes. The lithologies consist of rhyolitic, andesitic, gabbroic, basaltic and granitic igneous rocks, arenaceous metasediments, ironstones and sediments.

Rocks from Saint Francis Island include trachyte, trachyandesite and rhyolite. Drill core from Dampier DDH1 includes 2 types of dolerite, and from Afmeco KGB3 fresh dolerite or basalt. Other specimens examined include basalt and gneiss from the...