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...

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.

There is no abstract created for this record

Compilation of Departmental and company records on tenure and production.

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...

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 References include SADME unpublished reports.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.

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...

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...

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...

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.

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...

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...

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...

There is no abstract created for this record

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.

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...

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.

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...

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...

There is no abstract created for this record