An absolute age of 677 Ma +/- 12 Ma was determined from analyses of six selected zircon grains separated from the subject volcanic rock sample, but the result is strongly affected by the need to impose large corrections to the data to compensate for...

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In a continuation of diamond and base metal exploration of newly discovered carbonatite / kimberlite intrusive bodies in an area located immediately north of Orroroo, these bodies were examined petrographically and analysed to compare their...

Late in 1981, BHP Minerals whilst exploring on its Orroroo region EL 891 discovered four stream gravel samples containing kimberlite indicator minerals. The stream drainage system in which these samples occur commences south of the southern boundary...

In order to further test a large Delamerian granite pluton for its potential to host an economic porphyry molybdenum deposit of the Climax, Colorado type (following initial exploratory drilling and IP surveys that had been carried out by the SA...

Detailed stream sediment, loam and barrage sampling carried out over the main channel and various tributaries of the Manunda Creek drainage system confirmed the presence of widespread kimberlitic indicator minerals, plus a 31 microdiamonds. 5 small...

Exploration of an area located approximately 10 miles north of Manna Hill, seeking possible economic Zambian Copperbelt style stratabound copper deposits, has consisted only of an orientation geochemical survey followed by field inspection of...

Reconnaissance and detailed bulk loam sampling undertaken to look for diamonds or kimberlite indicator minerals in the vicinity of the Pualco Anticline, plus spectrographic analyses of the derived heavy mineral concentrates for gold and base metals...

Stratabound, chemically precipitated Telfer - type replacement style vein gold was the target of exploration undertaken over an area 25 km north-west of Yunta, which contains good exposures of Neoproterozoic Umberatana Group clastic metasediments that...

Initial exploration carried out near Lilydale Homestead, 80 kilometres south-east of Yunta, targeted possible Starra-style gold in the Braemar Ironstone facies. Flying of an airborne semi-detailed magnetic and radiometric survey identified magnetic...

Exploration for possible large, potentially open cut - mineable disseminated quartz vein - type syngenetic gold and base metal deposits within a licence area located near Outalpa, 150 km south-west of Broken Hill, has comprised geological mapping,...

As part of continued exploration over a 48% reduced licence area from prior EL 1416 (see Env 8585 for relinquishment report), 36 exploratory inclined RC drillholes (total penetration 3404 m) evaluated nine high-priority aeromagnetic targets, with some...

Copper and gold exploration comprising outcrop, stream sediment and soil geochemical sampling, and the conduct of ground magnetic and IP surveys, plus RC percussion (67 vertical holes, total 6624 m) and diamond cored tail drilling (in 2 holes, total...

An outcrop of quartzite situated on private property on the southern side of the Sturt Highway, 4 miles east of Truro, was visited on 27/2/1953 to perform a geological survey in order to select sites for testing the rock by diamond drilling. The aim...

Sturtian glacial sediments south of Yunta contain haematitic and magnetitic siltstones (banded iron formation) and haematitic and magnetitic tillites formed by chemical deposition of magnetite euhedra in a finer grained haematite groundmass. Both...

An inspection of an occurrence of talc situated in Section 228, Hundred of Jellicoe, 3¼ miles northeast of Truro, was made on 12/10/1960. The deposit was first noted by D. King (Mining Review 103, 1957, pp. 68-69) when a borehole showed about 4 feet...

Sediments in the area consist of blue dolomitic flaggy and laminated slates and grits, and are equated with the Sturtian Series of the Adelaide System. Copper lodes occur parallel to the beds, which dip between 50-70°W. During the period March to July...

Copper carbonates are sporadically distributed throughout steeply dipping mica schist in a zone up to about 70 ft. wide. The host rocks have been regarded as overturned metamorphosed Burra Group (Torrensian) beds resting on the Aldgate Sandstone...

Attempts to date granites and metamorphics within the Outalpa (Willyaman) Inlier of South Australia were made in order to determine isotopic ages of events within the Proterozoic Olarian Orogeny. Two conformable adamellitic to granodioritic gneisses...

This report presents a comprehensive summary of the results of considerable geological, survey and beneficiation work which has been carried out at four mines. The mined deposits have been formed in Burra Group schists and gneisses that constitute the...