Abstract
Geochemical characteristics of the Upper Archean-Lower Proterozoic Jiaodong Group — the host rocks of the famous Jiaodong gold deposit are described in this paper. It is shown that the Jiaodong Group is an important Au-bearing formation containing 19.5 ppb Au on average, about 5 times as much the abundance in the crust. It is also found that the distribution of gold in the strata is uneven and that plagioclase amphibolite is the prospective Au-bearing rock. In the processes of regional metamorphism, migmatization and fault-remelting, gold in the source bed was remobilized and concentrated to form various types of gold deposits in this province.
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