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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...-
Document
Published: 09 Aug 1975
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RB 78/00065 Nephrite jade deposits near Cowell. Report no. 2 - Trial mining and evaluation of the jade.
Cowell jade province contains 100 outcrops. The nephrite jade is associated with isoclinally folded dolomitic marble and calc silicate horizon in the upper Gneiss Complex of the Early Proterozoic Cleve Metamorphics. Discusses mining methods and quality.-
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Published: 01 Jan 1978
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RB 82/00050 South Australia. Investment and development for the 80s. Investment seminar April 1982, Singapore and Hong Kong.
There is no abstract created for this record-
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Published: 01 Jul 1982
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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...-
Document
Published: 01 Sep 1987
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RB 87/00121 Bibliography of nephrite jade to 1987.
The bibliography includes nephrite jade, geology, gemmology and rare jade carving, but not jadeite. References include SADME unpublished reports. Includes computer printouts of GEOREF, GEOARCHIVE and NTIS.-
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Published: 01 Dec 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...-
Document
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...-
Document
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...-
Document
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 90/00007 Industrial minerals in South Australia. Current operations and future trends.
Established producers have taken advantage of export opportunities for gypsum, salt and dolomite. New developments include a graphite processing plant at the former Uley Graphite Mine and trial mining of micaceous iron oxide for pigments. Proposals...-
Document
Published: 01 Jan 1990
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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-
Document
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.-
Document
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...-
Document
Published: 08 Dec 1980
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South Australian gemstone industry - Opportunities for investment and business migration policy.
Identifies opportunities and recommends means of reporting and evaluating activities of possible business migrants. Potential for expansion mainly lies in local opal processing industry and jade export sales.-
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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...-
Document
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...-
Document
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
