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当前世界上的金大半都产在前寒武纪地带,今后大部分发现的也将在这一地带.定在今年(1984)11月召开的美国地质学会年会.以及今年10月间将在南亚召开的有关座谈会中,前寒武纪金矿的问题都将作为一项研究课题提出.这里想介绍的是澳大利亚的几处前寒武纪金矿床.澳大利亚前寒武纪金矿床之一—奥林匹克水坝铜-铀-金矿床该矿床位于阿得雷德北西650公里,为1975年发现的层控矿床.矿床延伸20平方公里,最大层厚350米,矿石储量20亿吨,品位Cu1.6%,U_3O~(?)0.06%,Au0.6g/T.矿床处于阿雷德层下部350米的奥林匹克水坝层(略晚于15.8亿年)中,该层为水平展布的非变质沉积岩.含有赤铁矿.
Most of the world’s gold is now produced in the Precambrian region and most of the discoveries will be made in this area in the coming year (1984) November, and the annual meeting of the American Geological Society In the forum held in South Asia, the questions of the Precambrian gold mine will be put forward as a research topic. Here we want to introduce some Precambrian gold deposits in Australia. One of the Precambrian gold deposits in Australia - the Olympic Dam Copper-Uranium - Gold Deposit The deposit is located 650 km northwest of Adelaide and is a stratiformic deposit discovered in 1975. The deposit extends 20 km 2 with a maximum thickness of 350 m and reserves of 2 billion tonnes of ore with a grade of Cu 1.6%, U 3 O 3 ?) 0.06%, Au0.6g / T. The deposit is located 350 meters below the Adelaide Olympic Dam layer (slightly later than 1.58 billion years), which is a horizontal distribution of non-metamorphic sedimentary rocks containing hematite.