Proceedings of a joint meeting of the Geological Society of Australia and the Australasian IMM, held in Melbourne, Australia, 25 May 1995.

An extended abstract and a paper are presented: Geology and exploration of the Yandal belt, Western Australia, by Phillips N., 1p.; and Discovery of the Bronzewing gold mine, by Eshuys E., Herbison I., Phillips N. and Wright J., 15pp., 8 refs. Less than ten years ago the Yandal greenstone belt appeared devoid of significant gold deposits, but the discovery of Bronzewing, Jundee, Mount McClure, Darlot and Goudis has changed perceptions dramatically. The extensive and in places deep cover that handicapped early prospectors, and the recent recognition that the belt is part of the Norseman-Wiluna belt, make it likely that further deposits will be found. Bronzewing is one of the largest gold deposits discovered in Australia for several decades, with resources estimated from undercut assays at 20 200 000 tonnes ore grading 4.7 g/t Au. It was discovered during a regional rotary air-blast drilling programme after conceptual geological studies had identified favourable areas of the Yandal belt. Like many other Archaean greenstone gold deposits it is a structurally controlled quartz vein hosted by a greenschist-facies basalt succession with strong alteration around the mine area and sulphide and mica alteration immediately adjacent to gold mineralisation. There are a number of distinct ore shoots of variable geometry, some of which continue below 400 m. The current resource is constrained within a volume with dimensions of about 1.5 x 0.5 x 0.5 km.
An extended abstract and a paper are presented: Geology and exploration of the Yandal belt, Western Australia, by Phillips N., 1p.; and Discovery of the Bronzewing gold mine, by Eshuys E., Herbison I., Phillips N. and Wright J., 15pp., 8 refs. Less than ten years ago the Yandal greenstone belt appeared devoid of significant gold deposits, but the discovery of Bronzewing, Jundee, Mount McClure, Darlot and Goudis has changed perceptions dramatically. The extensive and in places deep cover that handicapped early prospectors, and the recent recognition that the belt is part of the Norseman-Wiluna belt, make it likely that further deposits will be found. Bronzewing is one of the largest gold deposits discovered in Australia for several decades, with resources estimated from undercut assays at 20 200 000 tonnes ore grading 4.7 g/t Au. It was discovered during a regional rotary air-blast drilling programme after conceptual geological studies had identified favourable areas of the Yandal belt. Like many other Archaean greenstone gold deposits it is a structurally controlled quartz vein hosted by a greenschist-facies basalt succession with strong alteration around the mine area and sulphide and mica alteration immediately adjacent to gold mineralisation. There are a number of distinct ore shoots of variable geometry, some of which continue below 400 m. The current resource is constrained within a volume with dimensions of about 1.5 x 0.5 x 0.5 km.