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引言罗彼斯金矿床位于伊什珀明西北大约5.5公里的北密执安太古宙伊什珀明绿岩带内(图1)。伊什珀明绿岩带是由几千米的主要水下的变质镁铁质到长英质的火山岩组成,被太古宙(27—25亿年)的辉长岩和长英岩墙以及橄榄岩和花岗深成岩侵入。这些岩层遭受到强烈的多期变形作用。在绿岩带赋存许多金和贱金属产地,但是最有意义的是罗彼斯矿体,它从1882—1897年开采,已产黄金1250公斤,白银6200公斤(金6克/吨,银28克/吨)。最初生产主要是从8个透镜状,垂直雁行排列的石英脉内开采的。后来在已
Introduction The Rocks gold deposit is located within the Greenpeace Ishpemen Greenstone Belt, North Michigan, about 5.5 km northwest of Ishmammun (Figure 1). The Ishpem Greenstone Belt is composed of several kilometers of major underwater metamorphic mafic to felsic volcanic rocks that are surrounded by gabbro and Changying dikes of the Archean (27-25 billion years) and olive Rock and granite plutonic intrusion. These formations are subject to strong multi-stage deformation. Many of the gold and base metal origins are hosted in the Greenstone Belt, but the most significant is the Roebel Ore, which was mined from 1882 to 1897 and has produced 1,250 kilograms of gold and 6,200 kilos of silver (6 grams of gold per tonne of silver 28 grams / ton). The initial production was mainly from eight lenticular, vertical geese aligned quartz vein mining. Later on already