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Henry James Evans
Henry James Evans (7 November 1912 – 9 November 1990) was the leading exploration geologist and discoverer of the immense bauxite deposits near Weipa, on the west coast of Cape York Peninsula in northern Queensland, Australia. Evans was born on 7 November 1912, in Greymouth, a mining centre on the west coast of the South Island of New Zealand. After graduating from high school he studied geology at the Reefton School of Mines. After working evaluating gold dredging areas on the west coast and later for a tin mining company, he joined New Zealand Petroleum as senior geologist in 1938 and spent six years with them before spending most of 1945 assessing the resources of the Greymouth Coal Basin with the New Zealand Geological Survey. In 1946 he moved to Australia joining the Zinc Corporation (now Rio Tinto Group, Rio Tinto) and worked for them looking for oil, gas in Australia, uranium at Rum Jungle, and for potash in the United Kingdom. In 1955, he was asked to lead a group of A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bauxite
Bauxite is a sedimentary rock with a relatively high aluminium content. It is the world's main source of aluminium and gallium. Bauxite consists mostly of the aluminium minerals gibbsite (Al(OH)3), boehmite (γ-AlO(OH)) and diaspore (α-AlO(OH)), mixed with the two iron oxides goethite (FeO(OH)) and haematite (Fe2O3), the aluminium clay mineral kaolinite (Al2Si2O5(OH)4) and small amounts of anatase (TiO2) and ilmenite (FeTiO3 or FeO.TiO2). Bauxite appears dull in luster and is reddish-brown, white, or tan. In 1821, the French geologist Pierre Berthier discovered bauxite near the village of Les Baux in Provence, southern France. Formation Numerous classification schemes have been proposed for bauxite but, , there was no consensus. Vadász (1951) distinguished lateritic bauxites (silicate bauxites) from karst bauxite ores (carbonate bauxites): * The carbonate bauxites occur predominantly in Europe, Guyana, Suriname, and Jamaica above carbonate rocks (limestone and do ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
