两种不同类型花岗绿岩地体的金矿化差异

DIFFERENCES IN GOLD MINERALIZATION OF TWO DIFFERENT TYPES OF GRANITE BLUE ELVAN TERRAINS

本文简述了华北克拉通南缘、东缘和印度、西澳的金矿分布规律和地质概况。根据花岗岩类和绿岩的特征以及它们的先后关系,将花岗绿岩地体区分为O型和C型,其构造型式分别是绿岩→花岗岩类(改造系列为主)和花岗岩类(TTG为主)→绿岩。认为O型花岗绿岩地体有利于金矿化,C型花岗绿岩地体不利于金矿化。绿岩的混合岩化、花岗岩化作用为控制金矿化的主导因素。

This paper states the distribution laws of gold deposits and gives the geological outlines of the southern margin and the eastern part of the North-china Craton as well as India. and western Australia. The granite blue-elvan terrains are distinguished as o and c types according to the features of the granite types and blue elvan and their priority relationship. Its structuring forms are blue elvan-granite types (mainly migmatization-granitization series) and granite-blue elvan (mainly TIG). The terrains of o-type granite blue elvan are considered to be favourable to gold mineralization, and the terrains of c-type granite blue elvan unfavourable to gold mineralization The migmatization-granitization of the blue elvan is the main factor in controlling gold mineralization.