韧性剪切带的地质地球化学标志及其找金意义

Geological and Geochemical Recognizable Indicators for Ductile Shear Zone and Prospecting Significances for Gold

近年来,剪切带对金矿的控制作用问题引起人们的普遍关注。剪切带对控制全世界各种各样的、有重要经济价值的金矿床有极为重要的作用,必须承认最重要的一些金矿往往是受大断裂控制的。为配合国家三○五项目Ⅰ_(3-2)专题研究,本文在前人基础上,

The shear zone type gold deposit located within the shear zone and obviously controlled by the shear zone is a kind of gold deposit which has an important economic and theoretical significance. The detailed studies on geological and geochemical recognizable indicators for ductile shear zone are important to the discovery of gold deposit in shear zone. The different development stage of gold-bearing shear zone has its typical geochemical characteristics. In the early stage, using Pb anomaly to determine the location of gold-rich orebody in the bigger An-As anomaly is very effective. In the middle stage, Pb has close relations with Au. Such a relationship of Pb-Au is an important indicator of gold mineralization in shear zone. In the late, stage, large amount of Ag appears. The gold bearing fluid in extension fissures is mainly composed of Cu-Pb-Ag.