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Describes rocks from 3 areas formerly mapped as Flinders Group. Granites in each area are distinctively different, but metasediments are similar.

The Carnot Gneisses form an extensive layered sequence that crops out in southernmost Eyre Peninsula. They consist of garnetiferous quartzofeldspathic gneiss, hypersthene gneiss, granitic gneiss and basic granulite. Rb/Sr whole rock studies indicate a...

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EML 3554, 9 km NW of Tumby Bay, contains 3 separate marble outcrops, each 40 metres wide, of similar mineralogy, which are isoclinally-folded Katunga Dolomite of the Hutchison Group of Lower Proterozoic age. The marble quarries where mapped, surveyed...

The major units present are Middle Proterozoic poorly foliated granite, suite of acid volcanics and alkali granite. Dyke rocks include dolerite, leucogranite and acid porphyry, overlain by Pleistocene calcarenites of the Bridgewater Formation and...

Geological mapping has defined a northeasterly fault trend in the Radium Creek Metamorphics and Older Granite Suite basement. Pods of granitic breccia have developed along these faults, and to the east and NE of Mount Painter, they contain uraniferous...

The wholly cored SADME DDH Myall Creek RC1 was sited at the eastern extremity of the exposed Gawler Range Volcanics, and was completed [as a vertical hole] at 551.34 m total depth [the limit of drilling rig capability] on 26/10/1978, without reaching...

Major rock units on Cap Island are granitic gneisses and foliated granite of assumed Archaean to Early Proterozoic age (Sleaford Complex), and aeolianites and calcretes of Middle Pleistocene Bridgewater Formation. On Waldegrave Islands, similar...

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Electron microprobe analysis was carried out on 3 brecciated samples to establish whether feldspar grains have identifiable overgrowths and if these are consistent with the feldspar having grown in low temperature, low pressure conditions.

Reports on part of major structural study. The mylonite zone has developed by progressive deformation and recrystal- lization of high grade gneisses during regional fold event. The micro- structural development corresponds with sequence of...

This draft paper presents field observations which can be used to qualify two Rb/Sr geochronological results obtained from biotites sampled in sheared migmatitic gneiss of the western Yilgarn Block in WA. The site visited lies in a quarry near...

An abandoned quarry, 9 km NW of Tumby Bay, was mapped and surveyed. It is sited on the equivalent of the Katunga Domomite, part of the Hutchison Group of Middle Proterozoic age. The marble was isoclinally folded and metamorphosed to granulite...

Ordovician porphyritic rhyolite, 900 metres north of Mt Monster, 12 km south of Keith, was quarried from 1955 - 1976 to produce 548 477 tonnes of rail ballast and road sealing aggregate. This is an important aggregate resource, being finer grained and...

1 of the worlds principal nephrite jade deposits was formed during a late phase tectonic event, involving cross-warping and fracturing of high grade metamorphic complex.

This excursion guide is a refinement of a 6-day excursion led by Parker, Fanning and Flint in 1980 at the height of economic interest in the basement geology of the Gawler Craton. The interest in those days was for Alligator River - style uranium...

Detailed mapping undertaken between 1982 and 1987 of 48 known jade outcrops located in the Cowell - Cleve area, and diamond drilling of 3 jade outcrops and 2 ornamental marble prospects, has identified many factors controlling nephrite formation. The...

Outcrops of Proterozoic rocks consist of a complex suite of comagmatic intrusives which exhibit a variable degree of deformation and are correlated with the Early Proterozoic Lincoln Complex. On southern Saint Peter Island, felsic volcanics,...

Samples of basement recovered include metamorphosed metasandstone, phyllite and schist, unmetamorphosed sandy sediments with carbonate replacement, and granite.