黔西北纳雍枝铅锌矿床微量和稀土元素地球化学特征  

Geochemical characteristics of trace and rare earth elements in Nayongzhi lead-zinc deposit,northwestern Guizhou

作　　者：牛春晖 邓明国[1] 陈伟 黄长帅 贾祯 陈俞宏 Niu Chunhui;Deng Mingguo;Chen Wei;Huang Changshuai;Jia Zhen;Chen Yuhong(Faculty of Land Resource Engineering,Kunming University of Science and Technology,Kunming Yunnan 650093,China;West Yunnan University of Applied Sciences,Dali Yunnan 671009,China;China Nonferrous Guilin Research Institute of Geology for Mineral Resources Co.,Ltd.,Guilin Guangxi 541004,China)

机构地区：[1]昆明理工大学国土资源工程学院,云南昆明650093 [2]滇西应用技术大学,云南大理671009 [3]中国有色桂林矿产地质研究院有限公司,广西桂林541004

出　　处：《化工矿物与加工》2021年第2期30-34,共5页Industrial Minerals & Processing

基　　金：国家自然科学基金(41762009,41363001)。

摘　　要：纳雍枝铅锌矿床是黔西北地区迄今研究程度较高的大型矿床之一,为探讨成矿物质来源和矿床成因,应用ICP-MS方法对该矿床的主要矿物闪锌矿和白云石进行了微量、稀土元素分析,结果表明:闪锌矿微量元素相对地壳元素丰度,富集Ga、Cd、Sb,贫In;白云石和围岩的稀土元素都具有富集LREE和低异常δEu(δEu<1)的特征,且白云石的稀土元素总量略高于围岩的稀土元素总量,表明成矿物质具有多源性;该矿床地质特征与MVT型矿床相似,结合lnω(Ga)-lnω(In)关系图解认为该矿床为MVT型矿床。The Nayongzhi lead-zinc mine is one of the large deposits on which study was focused in Northwest Guizhou.In order to explore the source of metallogenetic materials and the formation of the deposit,the trace and rare earth elements contained in the main minerals such as sphalerite and dolomite were analyzed by ICP-MS method.The results show that the trace elements like Ga,Cd,Sb were enriched in sphalerite but Indium was poor compared to other earth elements,while rare earth elements contained high LREE and lowδEu(less than 1)in dolomite and surrounding rock.The total amount of rare earth elements in dolomite was slightly higher than that in surrounding rock,representing the diversity of the metallogenetic materials.The geological characteristics of the deposit were similar to those of MVT type deposit.Combined with the lnω(Ga)-lnω(In)diagram,the deposit was considered to be of MVT type.

关 键 词：铅锌矿床 微量元素 稀土金属 成矿物质来源 铁闪锌矿 MVT型矿床 下寒武统 白云石 

分 类 号：P618.4[天文地球—矿床学] P595[天文地球—地质学]