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• Adelaide Geosyncline
• Delamerian Orogen

• arsenic
• copper
• gold
• lead
• precious metal
• pyrite

Notes: Includes reports on:  - Gold mineralisation in the Adelaide Geosyncline. Progress report no. 1: [testing of samples from] the Wadnaminga Goldfield.   - Gold mineralisation in the Adelaide Geosyncline. Progress report no. 2: [testing of...

Notes: Includes reports on:  - Gold mineralisation in the Adelaide Geosyncline. Progress report no. 1: [testing of samples from] the Wadnaminga Goldfield.   - Gold mineralisation in the Adelaide Geosyncline. Progress report no. 2: [testing of samples from] the Ajax and other gold mines. The objectives of the presently reported investigations were to characterise the chemistry and mineralogy of the samples submitted, with particular emphasis on the nature of gold in the samples, the geochemistry of the gold-bearing veins, the extent of any primary element dispersion about the veins, and the possible origin of the veins. The samples were analysed chemically for gold and silver, plus a wide range of trace elements, and were studied petrographically and mineragraphically, paying particular attention to the nature of any visible native gold. Colour photomicrographs were taken of relevant textures. Samples of barren vein quartz collected between Anabama Hill and Wadnaminga were studied micro-thermometrically to determine the homogenisation temperatures of fluid inclusions the vein quartz.   - Gold mineralisation in the Adelaide Geosyncline. Progress report no. 3: Evaluation of Peterborough Battery tailing stockpiles. The Government-owned mineral stamp battery located at Peterborough presently treats ores from various goldfields by crushing and plate amalgamation; tailings from this process are stockpiled without further treatment. During the period 1973-1976 some 870 tonnes of ore were treated at the battery, with a gold recovery of around 70%. The South Australian Department of Mines and Energy had estimated that about 1200 tonnes of tailings (1973-1976 plus earlier tailings) are stockpiled at Peterborough Battery, perhaps containing an average of up to 5 ppm (5 g/tonne) Au. Recently SADME proposed that an evaluation should be made of the possibility of recovering gold contained in the tailings stockpiles by studying the mineralogy of the tailings, and that the mineralogy of the primary ores should be studied to investigate the possibility of increasing gold recovery during amalgamation. Late in 1977 the Department sampled various tailings stockpiles by drilling, and 24 samples were submitted to Amdel for investigation   - Gold mineralisation in the Adelaide Geosyncline. Progress report no. 4: [Further] Evaluation of Peterborough Battery tailing stockpiles. The nature and distribution of gold in 5 selected tailings samples, as determined before and after cyanidation, was assessed from the samples' bulk mineralogy, particle size distribution in the head samples and in the cyanidation residues, and from visual inspection of polished sections of the >3.3 S.G. products of the head samples, looking for the grainsize and degree of liberation of native gold present therein. All of the native gold observed was intergrown with or enclosed in goethite (after ?pyrite), so in terms of recovering such gold by further treatment, cyanidation without grinding would not access the completely enclosed portion, which the earlier test results have suggested may constitute up to 30% of the gold.
Geographic Locality: Anabama Hill;Eukaby Hill
Doc No: Env 02792

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