滇中地区新发现高品位氧化物型钴矿点  

Newly discovered high-grade oxidized cobalt ore spot in the central Yunnan Province

作　　者：周家喜 吕志成[2] 陈书富 孙载波 陈辉[2] 王小虎 李艳军[5] 赵俊兴[6] ZHOU JiaXi;LÜZhiCheng;CHEN ShuFu;SUN ZaiBo;CHEN Hui;WANG XiaoHu;LI YanJun;ZHAO JunXing(Key Laboratory of Critical Minerals Metallogeny in Universities of Yunnan Province,School of Earth Sciences,Yunnan University,Kunming 650500,China;Development and Research Center,China Geological Survey,Beijing 100037,China;Yunnan Nonferrous Geological Bureau,Kunming 650051,China;MNR Key Laboratory of Sanjiang Metallogeny and Resources Exploration&Utilization,Yunnan Institute of Geological Survey,Kunming 650216,China;School of Earth Resources,China University of Geosciences,Wuhan 430074,China;Key Laboratory of Mineral Resources,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China)

机构地区：[1]云南省高校关键矿产成矿学重点实验室,云南大学地球科学学院,昆明650500 [2]中国地质调查局发展研究中心,北京100037 [3]云南省有色地质局,昆明650051 [4]自然资源部三江成矿作用及资源勘查利用重点实验室,云南省地质调查局,昆明650216 [5]中国地质大学资源学院,武汉430074 [6]中国科学院矿产资源研究重点实验室,中国科学院地质与地球物理研究所,北京100029

出　　处：《岩石学报》2024年第2期623-628,共6页Acta Petrologica Sinica

基　　金：云南省新一轮找矿行动暨地勘基金项目(Y202303);云南大学关键金属成矿与找矿预测创新团队项目(2021-3);科研启动项目(YJRC4201804)联合资助。

摘　　要：我国西南地区(尤其是云南省)已报道岩浆型、热液型、风化型和沉积型等多种类型Co矿床/点,资源潜力很大,是我国重要的Co矿资源找矿远景区。最近,笔者在滇中地区发现了一种新类型Co矿点,钴氧化物呈粉红色-桃红色稠密浸染状、(细)脉状或团斑状等赋存于元古界硅化浅变质岩中,与石英、云母、磷灰石、碳酸盐矿物和硫化物等共生,受构造控制。这些钴氧化物主要为钴华,少量为水钴矿。地球化学分析结果显示,5件捡块样品的Co平均含量为0.23%,最高可达0.92%,同时富集Cu、As和Ni等元素;2件刻槽(1.5米/段)样品的Co含量为0.15%和0.22%。这一高品位氧化物型Co矿点的发现,具有重要的理论意义和现实价值。There are a number of reports of cobalt deposits,including magmatic,hydrothermal,weathering,and sedimentary types in SW China,particularly Yunnan Province,which makes this region as a critical player in cobalt resource exploration.Recently,the authors identified a new type of cobalt ore spot in the central Yunnan Province.This newly discovered cobalt ore spot exhibits pink-peach red cobalt oxides in Proterozoic silicified low-grade metamorphic rocks and is controlled by structure.The cobalt minerals,occurring as disseminated,fine-veined,and clustered forms,coexist with quartz,mica,apatite,carbonate minerals and sulfides.They are mainly erythrite with minor heterogenite.Chemical analyses of five collected samples yielded an average cobalt content of 0.23%,with a maximum value of 0.92%.Notably,the samples also display enrichments in elements such as copper,arsenic,and nickel.Analyses of two further grooved samples(1.5m/segment) revealed cobalt contents of 0.15% and 0.22%,respectively.The finding of this high-grade oxidized cobalt ore spot has significant theoretical implications and regional cobalt exploration.

关 键 词：钴 钴华 高品位钴矿 氧化物型钴矿 滇中地区 

分 类 号：P618.62[天文地球—矿床学]