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zimbabwe 100 trillion gold zimbabwe
zimbabwe 100 trillion gold zimbabwe
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witwatersrand metallogenesisabstract: the witwatersrand (wwr) ores contain more gold than could have been derived in particulate form by erosion from any conceivable type of . 5 to 50 ppt (parts per trillion). . wwr gold from that of greenstone belts in zimbabwe and . geological society of south africa, johannesburg. p. 63100. pretorius da.
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