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太古代绿岩是世界上主要富金地层之一,国内外很多学者论证,绿岩含金丰度值高,在绿岩经受地质作用过程中,金被活化、转移而富集成矿。但据我们研究,华北地台南缘太古代绿岩中含金丰度平均只有1.16PPb,远低于3.5PPb的克拉克值。含金丰度如此低的太古代绿岩,却形成了规模观可的小秦岭金矿,与上述结论明显不同,我们认为,太古代绿岩中金矿的形成是复杂的,不完全决定于岩石含金丰度值的高低。
Archean greenstone is one of the major gold-bearing formations in the world. Many scholars at home and abroad have demonstrated that the greenstone is rich in gold-bearing abundance. During the geological process of the greenstone, the gold is activated, transferred and enriched in mineralization. However, according to our research, the gold abundance in the Archean greenstone on the southern margin of the North China Platform averagely only 1.16PPb, much lower than the 3.5PPb Clarke value. The Archean greenstone with such a low abundance of gold formed a small-scale Qinling gold deposit on a scale that is obviously different from the above conclusion. We believe that the formation of gold deposits in the Archean greenstone is complex and not completely determined by Rocky gold abundance value of the level.