东昆仑督冷沟块状硫化物型铜钴矿矿物学特征及其指示意义  

Mineralogical characteristics and their implications for the Dulenggou VMS copper-cobalt deposit,East Kunlun

作　　者：牛斯达 吴华英 张建鹏 莫凌超 牛向龙 王英超 陈家浩 张敏 NIU SiDa;WU HuaYing;ZHANG JianPeng;MO LingChao;NIU XiangLong;WANG YingChao;CHEN JiaHao;ZHANG Min(Institute of Mineral Resources Research,China Metallurgical Geology Bureau,Beijing 101300,China;Mineral Comprehensive Utilization Research and Development Center,Institute of Mineral Resources Research,China Metallurgical Geology Bureau,Beijing 101300,China;Qinghai Geological Exploration Institute of China Metallurgical Geology Bureau,Xining 810001,China)

机构地区：[1]中国冶金地质总局矿产资源研究院,北京101300 [2]中国冶金地质总局矿产资源研究院资源综合利用工程中心,北京101300 [3]中国冶金地质总局青海地质勘查院,西宁810001

出　　处：《岩石学报》2025年第2期476-491,共16页Acta Petrologica Sinica

基　　金：第二次青藏高原综合科学考察研究(2019QZKK0801);广东省科技计划项目(2020B1212060055)联合资助.

摘　　要：东昆仑督冷沟铜钴矿是东昆仑成矿带东段发现的代表性铜钴多金属矿床之一,对该矿床的进一步深入剖析,对于东昆仑成矿带钴镍矿找矿新突破有重要借鉴意义。本文在对东昆仑督冷沟铜钴矿系统野外考察的基础上,重点对矿区矿石及氧化带矿物学特征开展了详细研究,结合岩石地球化学研究成果,探讨了该矿成矿潜力及找矿指示意义。研究区主要的矿石矿物有黄铜矿、(钴、镍)黄铁矿、辉钴矿、紫硫镍矿、辉砷镍矿、锑硫镍矿等。其中,铜主要以黄铜矿的形式赋存;钴和镍部分以类质同象形式赋存于黄铁矿中,部分以独立钴矿物和独立镍矿物存在。该矿床地表出露碳酸盐岩氧化带,矿体远、近端差异明显,与远矿体氧化带相比,近矿体氧化带矿物组成出现三水铝石、方解石等矿物,Co、Ni、Cu、Zn、Mn含量更高,指示了成矿过程中出现的多金属热水溶液在氧化带形成了特征性晕圈。矿区独立钴矿物和独立镍矿物的发现及氧化带较高的Co、Ni、Cu、Zn、Mn含量显示研究区具有较大的找矿潜力。The Dulenggou copper-cobalt deposit stands as a prominent instance of copper-cobalt polymetallic mineralization,situated in the eastern section of the East Kunlun metallogenic belt.The ore bodies therein are chiefly emplaced within the metavolcanic-sedimentary rock segment of the Lower Wanbaogou Group.The wall rocks predominantly consist of chlorite-sericite phyllites(encompassing sericitized siliceous rock interlayers).A meticulous examination of this deposit holds substantial promise for propelling cobalt and nickel exploration within the East Kunlun metallogenic belt.This research undertakes in-depth research of the ore mineralogy and the oxidized zone of the Dulenggou copper-cobalt deposit.It is presaged on comprehensive field investigations carried out in the East Kunlun area and buttressed by petrogeochemical research outcomes.The principal aim is to evaluate the mineralization potential of the deposit and its implications for exploration strategies.The principal ore minerals identified in the study area encompass chalcopyrite,cobaltiferous and nickeliferous pyrite,cobaltite,ullmannite,violarite,and gersdorffite.Copper is mainly hosted in chalcopyrite,whereas cobalt and nickel are preponderantly incorporated into pyrite via isomorphous substitution,with only a minor fraction existing as independent cobalt and nickel minerals.The carbonate oxidation zone exposed on the supergene area demonstrates conspicuous disparities between the proximal and distal regions.In contrast to the distal oxidation zone,the proximal zone presents a more intricate mineral assemblage,featuring nordstrandite and gibbsite,and harbors higher concentrations of Co,Ni,Cu,Zn,and Mn.This implies that multi-metallic hydrothermal fluids played a pivotal part in generating a mineralization halo within the oxidation zone.The elevated abundances of Co,Ni,Cu,Zn,and Mn in the proximal zone further accentuate auspicious prospects for mineral exploration in this locality.

关 键 词：东昆仑成矿带 督冷沟铜钴矿 VMS矿物学特征 找矿潜力 

分 类 号：P575.1[天文地球—矿物学] P618.41[天文地球—地质学] P618.62