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与这两种成分有关的矿床岩性变化很大.在确定溶液源成分时,含矿母岩和与其有关的地层性质是十分重要的,这是提供一个确切的成因模式的基础.同上述两组矿床有关的一些不同的岩性特点如下: 1.火山岩和沉积岩的相对含量Cu-Zn矿床组大多数赋存在以火山岩为主的地层或火山岩派生的沉积岩不发育的地层中.如北美大多数前寒武纪矿床赋存在绿岩带以火山岩为主的岩石中.相反,芬诺斯堪的纳地盾许多前寒武纪矿床则经常分布在含有少量长英质火山岩成分的沉积岩层中.而显生
The lithologies of the deposits associated with these two compositions vary greatly and it is of great importance for the ore-bearing parent rock and the stratigraphic properties associated with it to determine the source composition of the solution, which is the basis for providing an exact pattern of genesis Some of the different lithologic features associated with the Group deposits are as follows: 1. Relative abundance of volcanic and sedimentary rocks Most of the Cu-Zn mineralization occurs in undeveloped sedimentary rocks derived from volcanic or volcanic rocks such as most North American Precambrian deposits occur in volcanic-dominated rocks of the Greenstone Belt, whereas many of the Precambrian deposits on the Finn Scandinavian Shield are often found in sedimentary formations that contain small amounts of felsic volcanic rocks. And significant