Methods of prospecting in ultrabasic belts of USSR.

An increase in production of $3.84 million from 1984 resulted from significantly increased production from Mintabie. Both Andamooka and Coober Pedys production declined as a result of miners relocating and working at Mintabie.

Inferred reserves of 8 000 tonnes of jade per vertical metre are contained within 113 jade lenses. Down to an economic mining depth of 10 metres, 80 000 tonnes of jade are inferred with 60 000 tonnes recoverable. 82 jade outcrops on 20 mineral leases...

221 shafts were drilled. Precious opal or potch was found in 11 shafts and good sandstone prospective for opal in 34 shafts. A new field, Southern Cross, was established subsequent to the discovery of potch in subsidised shaft 85.

By comparison with 1982 figures, trends in the industry were :-marginal increase in production from $28.76 million to $31.15 million. -increase in number of registered Precious Stones Claims on all fields, with increase of 48 at Coober Pedy. -increase...

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...

Small quantities of precious opal have been mined from sediments of the Early Cretaceous Marree Formation at Stuart Creek, 50 km north of Andamooka. These sediments appear to have been unaffected by the Early Tertiary deep weathering and bleaching...

There is no abstract created for this record

South Australia has been a traditional source of non metallic minerals. Those minerals currently being mined that offer scope for expansion is – Barite – In pigments, drilling muds, the manufacture of barium chemicals and for medical purposes...

During May - September 1978, 66 shafts were sunk under subsidised mining programmes to encourage testing of new areas. The new fields of Stans Hill and Yarloo West were established subsequent to the discovery of opal in Shafts 17 and 49.

There is no abstract created for this record

Since the discovery of precious opal at Stuart's Range, now called Coober Pedy, in 1916, South Australia has become the major world producer of precious opal. Although the industry's growth has been hampered by two world wars and harsh climatic...

Describes geology of all known chiastolite localities.

Old mines and prospects were located, sketch mapped and photographed. Ultra- violet lamp was used to search for scheelite in Mt McTaggart area and west of Mt Fitton. Scintillometer was used to search for radioactive minerals.

Amethystine and clear crystalline quartz infills fractures and cavities in quartzite of the Belair Subgroup of Proterozoic age, near Fullerville in the Mid-North of South Australia. The quartz crystals range in colour from milky to clear, through...

Core and cuttings from 7 stratigraphic wells in the Officer Basin were examined principally to develop a depositional model for sediments of pre-Permian age. Evidence from 6 of the wells suggests that an epeiric environment prevailed during ?Cambrian...

Various petrophysical property measurements (total count radiometric, mag susceptibility and specific gravity) were made at 1-metre intervals on samples of stored drill core recovered from the hole depth range 210 m to 710 m (TD) in SADME Wilkinson 1...

This note records the discovery of previously unrecognised Early Cretaceous fossiliferous sediments unconformably overlying Palaeozoic rocks at the Mintabie opal field. Following renewed mining activity at Mintabie in 1977-78, the Mineral Resources...

Small quantities of precious opal have been mined 1977-79. Opal and potch occur as opaline-silica cement within Cretaceous sandstone lenses, and as thin seams and fracture infillings within Cretaceous claystone, clasts and vein infillings within...