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Minbrie. Progress reports for the period 28/6/1973 to 27/6/1975.
Reports describe the ongoing field prospecting and downstream jade marketing activities associated with the Cowell nephrite jade discovery. Black nephrite blocky material extracted from the operating company's new mining leases (MLs 4130-4132) was...-
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Published: 09 Aug 1975
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RB 84/00011 Nephrite jade deposits near Cowell. A review of mineral tenure and production to December, 1982.
Compilation of Departmental and company records on tenure and production.-
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Published: 01 Dec 1983
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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...-
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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 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 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 89/00004 Cowell Jade - Talk presented at International Symposium on Geochemistry and Mineralization of Proterozoic Mobile Belts, Tianjin, China, September, 1988.
The talk Cowell jade : a Middle Proterozoic, marble-hosted, nephrite jade deposit gives a brief overview of previous compilations (quality, production, reserves, history, geology, structure, metamorphism, metasomatism and mechanism of nephrite...-
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Published: 01 Oct 1988
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RB 91/00086 Mineral occurrences of the YARDEA 1:250 000 map sheet area.
There is no abstract created for this record-
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Published: 01 Sep 1991
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RB 88/00054 Cowell Jade - A middle Proterozoic, marble-hosted, nephrite jade deposit.
Brief review of the deposit is presented, including regional geology, ore deposit features, production, history, quality, value, reserves and mining methods. It is the largest known high quality nephrite jade deposit in the world.-
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Published: 01 Jul 1988
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Cowell nephrite deposit. Technical appraisal reports submitted during the period 1970 to 1988.
A consultant geologist's reports prepared in 1970 for by mining lease optionholder Murumba Minerals NL describe his detailed mapping of the then known jade (nephrite) deposits within the Cowell Jade Province. Two potentially mineable deposits were...-
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Published: 08 Dec 1980
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Cowell Jade Province: rock sample petrographic descriptions.
A collection of Amdel petrographic reports providing raw data for a petrogenetic study of Cowell area jade specimens and related host rocks carried out by SADME, aimed at determining geological controls on the distribution of high quality nephrite...-
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Published: 01 Jan 1990
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A gemmological assessment of the nephrite jade deposits near Cowell, South Australia.
Nephrite jade is associated with Lower Proterozoic dolomitic marbles and calc-silicate rocks as part of a sequence of metasedimentary quartzo-feldspathic gneisses, quartzites and mica schists of amphibolite metamorphic facies. These rocks normally...-
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Published: 08 Dec 1980
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Report on jade areas covered by EL 455 for period 2st April to 30th Sept 1979.
There is no abstract created for this record-
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Published: 01 Jan 1979
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ExpNotes WHYALLA: Explanatory Notes WHYALLA
There is no abstract created for this record-
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RB 74/00216 Colour of nephrite jade from Cowell.
Nephrite jade is associated with an isoclinatly folded dolomitic marble and calc-silicate rock horizon in the metasedimentary upper "Gneiss" Complex of the Cleve Metamorphics (Precambrian) near Cowell. Detailed geological, petrographic and chemical...-
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Published: 20 Nov 1974
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Cowell nephrite deposit. Consultant's geological appraisal reports (including a progress report about detailed mapping of nephrite pods on Schiller's leases), compiled over the period June to November 1970.
A mining consultant was engaged by mineral claim option holder Murumba Minerals to assess the commercial potential of a rare (for Australia) grouping of lens style nephrite deposits located about 20 km north of Cowell, which had only been mined on a...-
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Published: 11 Nov 1970
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HandBk 004 - Some Semi-Precious and Ornamental Stones of South Australia. Barnes, L.C., et al. 1980 Australia. (reprinted version)
This handbook is a selection of shortened reports by geologists of the South Australian Department of Mines and Energy dealing with some of the semiprecious and ornamental stones in this State. It is not intended to be a comprehensive review of these...-
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