东昆仑百吨沟金矿床地质特征及找矿模型  

Geological characteristics and prospecting model of the Baidungou gold deposit,Eastern Kunlun

作　　者：朵德英 赵宗骁 侯得武 周鹏 DUO Deying;ZHAO Zongxiao;HOU Dewu;ZHOU Peng(Qinghai Engineering Research Center of Deep Exploration Technology for Large and Ultra-large Gold Deposits around Qaidam Basin,Haidong 810600,Qinghai,China;The First Geological Exploration Institute of Qinghai Province,Haidong 810600,Qinghai,China)

机构地区：[1]青海省柴达木周缘大型超大型金矿深部探测技术创新工程技术中心,青海海东810600 [2]青海省第一地质勘查院,青海海东810600

出　　处：《矿产与地质》2024年第5期878-886,共9页Mineral Resources and Geology

基　　金：青海省地勘基金项目“青海省都兰县五龙沟地区金矿成矿规律及找矿潜力研究(青国土资矿[2017]151号)”;“青海省地质矿产勘查开发局项目(青地矿科[2021]80号)”共同资助。

摘　　要：百吨沟金矿床位于东昆仑成矿带中段,近年来在该矿床内发现了多处金矿点,显示良好的找矿前景。据调查和分析,该矿床严格受NNW向断裂构造控制,其赋矿地层为新元古界丘吉东沟组、长城系小庙组。该矿床中矿石金属矿物有自然金、富含金银辰砂、螺状硫银矿、黄铁矿、毒砂、磁黄铁矿等,有黄铁矿化、硅化和绢云母化与金矿密切相关的围岩蚀变。晚三叠世中酸性侵入岩为金矿的形成提供热源该矿床受益于含碳质和黄铁矿地层所提供的吸附障效应和还原障效应,是脆韧性剪切带、岩浆热液及特殊地层岩性耦合的结果。The Baidungou gold deposit is located in the middle part of the East Kunlun metallogenic belt.In recent years,many gold deposits have been found in the deposit,indicating a good prospect of ore search.According to the investigation and analysis,the deposit is strictly controlled by the north-northwest fault structure,and its ore-bearing strata are the Neoproterozoic Qiujidonggou Formation and the Great Wall Xiaomiao Formation.The ore metal minerals in the deposit are natural gold,rich in gold and silver cinnabar,spiral silver sulfide,pyrite,arsenopyrite,pyrrhotite,etc.There are wall rock alterations closely related to pyritization,silicification and sericitization.The Late Triassic intermediate-acid intrusive rocks provide heat source for the formation of gold deposits.The deposit benefits from the adsorption barrier effect and reduction barrier effect provided by carbonaceous and pyrite strata,which is the result of the coupling of brittle-ductile shear zone,magmatic hydrothermal fluid and special stratigraphic lithology.

关 键 词：金矿床 吸附障效应 还原障效应 成矿模式 找矿模型 东昆仑成矿带 百吨沟 

分 类 号：P618.51[天文地球—矿床学]