青海省苦海汞(金)矿床地质特征及找矿前景分析

Geological Characteristics and Prospecting Potential of the Kuhai Mercury Deposit in Qinghai Province

为查明本区成矿地质特征及综合评价其找矿潜力,通过野外地质调查和室内各类测试分析研究,表明苦海汞(金)矿床位于东昆南造山带南带,其矿体受构造和地层联合控制,呈透镜状、似层状平行产出,矿化边界性较好;矿石矿物以低温矿物组合为主,矿石组构较为单一;围岩蚀变主要为硅化、碳酸盐化;成矿流体为低温流体,同时有深部热液参与成矿的显示,属造山型金矿系列矿床之一。在此基础上通过对区域成矿条件及区域矿床成矿特征综合对比分析,认为苦海汞(金)矿区剥蚀深度较小,保存条件较好,具有很大的造山型金及多金属矿床找矿远景。

In order to learn the characteristics and synthetically evaluate the prospecting potential of the deposit,we have conducted field survey and many types of laboratory tests.The result shows that the ore bodies of the Kuhai gold-bearing mercury deposit,located in the southern orogenic belt of the East Kunlun,is controlled by lithological layers and structures.The ore rocks are composed of low temperature minerals,and the conformation and structure and mineralization types are simple.Alteration of the country rocks includes silification and carbonation.The mineralization occurred in a setting with low liquid and hot liquid from depth involved.It is a hydrothermal deposit in the orogenic belt.Based on these geological characteristics,we make comparison of metallogenesis of the Kuhai mercury with regional mineralization conditions.It is suggested that the Kuhai mercury（gold）deposit has a shallow depth of denudation,good preservation conditions and a bright prospect of exploration for orogen-type gold and multiple metal deposits.