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前言世界累积金产量的50％以上,不是直接产自太古宙绿岩带就是间接产自其后陆包括太古宙绿岩带的沉积盆地。其余大部分的金产自较年轻的地质环境,由此引起这样一个问题,就是什么原因使金在太古宙高度的富集,对硫化镍矿床也可提出类似问题:除诺尔斯克和肖得别里矿床(它们各自可能是三点交会处和陨石冲击的产物)外,世界大多数硫化镍矿床在成矿时代上也是太古宙。
Preface More than 50% of the world’s cumulative gold production is produced directly either from the Archean greenstone belt or indirectly from the sedimentary basin where its back-land, including the Archean greenstone belt. Most of the rest of the gold’s production from the younger geologic environment raises the question of why gold is highly enriched in the Archean and similar questions can be posed to the nickel sulphide deposits. Except for Knowles and Shaw Most of the world’s nickel sulphide deposits are also Archean during the mineralization era, except for the Miyun deposits (which may each be the product of three-point intersections and meteorite impacts).