The Long Ridge granite (informal names Sienna Granite, Sienna Brown and Sedan Granite) is fine to medium grained, probably crystallized under shallow cover. 15 samples are described to illustrate false variation, weathering alteration, fracturing,...

37 thin sections were examined and 3 specimens selected as possibly indicating potential ore deposits. Uncertainty is introduced by extreme variability of the material. The selected specimens contain andalusite as major aluminosilicate mineral. No...

Assessment of suitability for age determination by means of uranium lead isotope ratios in zircons. The rocks described include andesite, dacite, trachyte, rhyodacite and rhyolite.

In the search for groundwater over 90 km, 11 potential sites were selected on geological grounds. The Transient EM (TEM) surveys assessed ground resistivity, initially over 2 pre-drilled test areas. Of the other 9 areas, 6 showed favourable...

Heterogeneous collection of volcanic rocks, schists, gneisses, granitoids, microgranites, metabasics, greisenized quartzites, cherts and jaspilites.

Samples include Permian sandstones (Alpara Formation) similar to Cooper Basin sediments, plus Willouran rocks, possibly Sturtian and Permian tillites and one (?)pre-Willouran granitoid.

Middle Proterozoic leucogranites, granites, adamellites, granodiorites and dolerites which represent late Kimban Orogeny and anorogenic intrusives, are overlain by calcretes associated with Pleistocene Bridgewater Formation.

Compositionally banded calc-silicate comprising epidote, plagioclase and hornblende in zone of tight folding shows attractive fold patterns, suitable for decorative and ornamental purposes. Close jointing precludes use as dimension stone. Inferred...

Gravity traverses completed over the Blinman Dome indicate the presence of a low density body, interpreted to consist of brecciated material with a large depth extent. The bulk of the dismembered sedimentary rafts and xenoliths may be confined within...

21 specimens of volcanics and felsic gneisses are heterogeneous in both original lithology and the extent of metamorphic and metasomatic alteration. Strong granitic metasomatism may indicate concealed granitoid plutons. Continuation of andesitic...

15 specimens from the outcrop indicate that the layering and preferred orientation are due to magma flow and that the intrusion is probably not tilted through 90 degrees. The level exposed by erosion is probably close to the original roof of the...

OBD12 was designed by Western Mining Corp. to define the Cambrian sequence underlying its EL 640. Lithologies of drill core examined in thin section include siltstone, sandstone, paraconglomerate and, from 473 m, basement gneiss.

Rocks cut in the drill core from diamond drillhole WD-038 are igneous above 82.2 m hole depth and sedimentary below. The igneous rocks are altered basalts and basic pyroclastic flows. Analytical results from Basalt Flow 3 are included as Appendix 1...

Special attention was given to the influence of petrographic features on the quality of the rock as a dimension stone. The specimens included granodiorite, adamellite and granite. Foliation varied from moderate to absent. 5 categories of fractures...

Stratigraphic diamond drillhole Ooldea 3 was sited on an aeromagnetic anomaly within the Karari Fault Zone, and cored into buried Pre-Palaeozoic basement rocks that include paragneisses, iron formation, amphibolite and pegmatite. All lithologies...

Sheared granitic rocks from Black Hill are probably pegmatoid differentiates from the gabbroic pluton. Porphyritic, medium-grained basic rock from the Council quarry is either chilled marginal facies of the pluton or a post-plutonic dolerite dyke....

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For a project to determine the base metal potential of known copper-mineralised igneous rocks which outcrop in an area located approximately 59 km south-west of Olary, the South Australian Government has completed detailed mapping, geochemical...

Report criticises the methods, presentation and conclusions of a non-professional chrysoprase mining feasibility study prepared for the Commonwealth Government Opposition by parliamentary advisor J.P. West.