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RB 85/00016 Geology of the Whidbey Islands, Greenly Island, Rocky Island (North) and Rocky Island (South), LINCOLN 1:250 000 map sheet.
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...-
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Published: 01 Apr 1985
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RB 87/00092 Broad View 1. DDH well completion report.
Broad View 1 intersected 381.6 metres of deformed and recrystallized porphyritic rhyolite rhyodacite with minor interlayered calcsilicate gneiss, and 170.8 metres of Bosanquet Formation (new name) metasedimentary calcsilicate gneisses and schists, and...-
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Published: 01 Jul 1987
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RB 87/00116 World review of nephrite jade - Geology, production and reserves.
Data was gathered from a literature review and from government authorities in 11 countries. Excluding China, world production of nephrite since 1962 has averaged 780 tonnes / year, dominated by Taiwan averaging 444 tonnes / year, but mining has ceased...-
Document
Published: 01 Sep 1987
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RB 87/00122 Opaque minerals in metasediments from DDH Broadview no. 1 near Kimba, South Australia.
Opaque minerals from the Early Proterozoic, Mount Shannan Iron Formation are pyrite, pyrrhotite, magnetite and chalcopyrite.-
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Published: 01 Oct 1987
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RB 87/00110 Miscellaneous thin sections from the Proterozoic and Cambrian of South Australia.
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...-
Document
Published: 01 Sep 1987
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RB 84/00091 Nephrite jade near Cowell, South Australia.
Nephrite jade was formed in complex composite gneiss terrain by reaction of migrating silica with dolomitic marble at or near base of Hutchison Group during late stage folding of Kimban Orogeny. The larger of 112 known outcrops is conformable with...-
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Published: 01 Nov 1984
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RB 85/00020 Genesis of jade and host rocks in DDH14 at outcrop 15 Cowell Jade Province, South Australia.
The jade is produced by series of episodes of recrystallization and replacement during the retrograde metamorphism of prograde amphibolite facies assemblages in impure carbonate sediments. The quality is partly controlled by the original sediment...-
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Published: 01 Apr 1985
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RB 86/00035;Lib Review of diamond drilling of nephrite jade deposits near Cowell, South Australia.
Jade was first discovered in 1965, 20 km north of Cowell. It consists of nephrite formed within the migmatised Early Proterozoic Minbrie Gneiss Complex, with host rocks of dolomite marble and banded calc silicates. Alteration zones around nephrite...-
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Published: 01 Jun 1986
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RB 87/00073 Magmatic banding within Proterozoic granodiorite dykes near Streaky Bay, South Australia.
Narrow granodiorite dykes at Point Brown exhibit conspicuous banded margins and is cyclic showing systematic variation in mineralogy, geochemistry and grain size. These phenocryst poor, biotite rich layers originated by dynamic crystal sorting during...-
Document
Published: 01 Jan 1987
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RB 81/00004 Geology of islands within the Investigator Group, ELLISTON 1:250 000 map sheet.
Major units present are 2 suites of Middle Proterozoic granite and Middle Pleistocene calcarenite. The older granite suite has an age of about 1585 Ma, while the other suite had intrusive age of 1457 +- 25 Ma. The granites are enriched in K2O and SiO2.-
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Published: 01 Jan 1981
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RB 77/00107 Evolution of the Middle Proterozoic Chandabooka Caldera, Gawler Range acid
Volcanism associated with the Middle Proterozoic Gawler Range acid volcano-plutonic province was initiated in the Kokatha area by the construction on Archaean basement of a large stratovolcano composed mainly of tholeiitic basalt and potassic basaltic...-
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Published: 20 Sep 1977
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RB 77/00090 Pillow structures in an older Precambrian hornfels near Kokatha, South Australia.
There is no abstract created for this record-
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Published: 01 Aug 1977
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RB 82/00010 Geology of St Francis and West Islands, Nuyts Archipelago.
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...-
Document
Published: 01 Jan 1982
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RB 81/00029 Gawler Range Volcanics in diamond drillhole Myall Creek RC1.
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...-
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Published: 01 Jan 1981
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RB 81/00114 Structural and metamorphic controls on the origin of nephrite jade near Cowell, SA.
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.-
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Published: 01 Nov 1981
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RB 88/00038 Bulgunnia 1 and 2. Well completion report.
Bulgunnia 1 tested acid and basic volcanics, extruded from an adjacent major fracture, that are interbedded with a probable coarse-grained breccia. Bulgunnia 2 tested a sedimentary breccia with possible volcanic interbeds. The project aimed to...-
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Published: 01 Jun 1988
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RB 89/00051 Cowell Jade Province: Detailed geological mapping and diamond drilling of jade and ornamental marble outcrops, 1982-1987. Volume 1.
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...-
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Published: 01 Jan 1992
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RB 89/00084 Geology of St Peter and Goat Islands (Nuyts Archipelago) and Cape Beaufort.
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,...-
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Published: 01 Jul 1989
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RB 93/00018 Review of exploration for kaolin near Poochera, northern Eyre Peninsula, South Australia.
The kaolin deposits located south-west of Poochera on northern Eyre Peninsula have formed by deep weathering of early to mid-Proterozoic crystalline basement rocks, which are now blanketed by late Tertiary to Quaternary terrestrial sediments. During...-
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Published: 01 Apr 1993
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RB 97/00053 Identification of a single wood fragment from the Gawler Craton, South Australia.
Analysis of a single wood sample from a silicified low energy, poorly sorted, sandy, fluvial horizon within an apparent palaeovalley on the Gawler Craton is identified as a member of the botanical family Podocarpaceae, with a possible affinity to the...-
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Published: 01 Nov 1997
