摘要
凉水沟铅锌矿床位于川滇黔铅锌成矿域中东部,为黔西北矿集区内的铅锌矿床之一。本文应用电子探针分析(EPMA)技术测定了凉水沟铅锌矿床中黄铁矿、闪锌矿的微量元素组成。结果表明,该矿床发育2期黄铁矿,黄铁矿-Ⅰ为沉积成因,受后期热液叠加改造作用明显,黄铁矿-Ⅱ为热液成因,二者均富集Pb、Zn、Co、Ni、As和Mo,贫Au、Ag、Sb等微量元素,而闪锌矿则以富集Cu、Fe、Cd、Pb、Ga等微量元素为特征。微量元素Co、Ni、Mo、Pb、As等可能以类质同象或矿物包体的形式赋存于金属硫化物中。硫化物微量元素特征显示其主要形成于中低温的成矿温度环境,具沉积-改造成因的特征。综合矿床地质特征及区域成矿地质背景,本文认为凉水沟铅锌矿床属沉积-改造型铅锌矿床。
The Liangshuigou Pb-Zn deposit, located in the eastern part of the Sichuan-Yunnan-Guizhou Pb-Zn mineralization domain, is one of the lead-zinc deposits in the north-western Guizhou metallogenic concentration area. The trace elements compositions of pyrites and sphalerites from this deposit have been tested by using electron probe microanalysis(EPMA) in this paper. The results show that there are two phases of pyrites in the Liangshuigou Pb-Zn deposit. Pyrite-I is of sedimentary origin, and is obviously reworked by the superposition of late stage hydrothermal fluid. Pyrite-II is of hydrothermal origin. Both kinds of pyrites are rich in Pb, Zn, Co, Ni, As, and Mo, but poor in trace elements such as Au, Ag, and Sb. The sphalerite is characterized with the enriched trace elements such as Cu, Fe, Cd, Pb, and Ga. Trace elements such as Co, Ni, Mo, Pb, and As, could occur in sulfides in forms of isomorphic replacement or their mineral inclusions. The trace element characteristics of sulfides show that they were mainly formed in the metallogenic environment of medium and low temperatures, with characteristics of sedimentation-reworking genesis. Based on the geological characteristics of the deposit and the regional metallogenic geological background, it is considered that the Liangshuigou Pb-Zn deposit belongs to a sedimentary-reworked Pb-Zn deposit.
作者
张馨玉
王新富
李波
邱文龙
向佐朋
岳言
杨四鑫
万邦明
杨德传
ZHANG Xin-yu;WANG Xin-fu;LI Bo;QIU Wen-long;XIANG Zuo-peng;YUE Yan;YANG Si-xin;WAN Bang-ming;YANG De-chuan(Faculty of Land and Resource Engineering,Kunming University of Science and Technology/Southwest Institute of Geological Survey Centre for Nonferrous Metals Resources,Kunming 650093,China;Faculty of Geography and Land Engineering,Yuxi Normal University,Yuxi 653100,China;Xinlong Mining Co.,Ltd.,Weining 553200,China;No.113 Geological Team,Bureau of Geology and Mineral Exploration and Development of Guizhou Province,Liupanshui 553000,China)
出处
《矿物学报》
CAS
CSCD
北大核心
2020年第4期418-429,共12页
Acta Mineralogica Sinica
基金
国家自然科学基金项目(编号:41862007,U1812402)
云南省万人计划青年拔尖人才(编号:YNWR-QNBJ-2018-093)
昆明理工大学重点学科建设(编号:14078384)
云南省矿产资源预测评价工程实验室(编号:2010)
云南省地质过程与矿产资源创新团队(编号:2012)
云南省科技计划地方高校联合专项(编号:201801P070031)。
关键词
硫化物
电子探针
矿床成因
凉水沟铅锌矿床
黔西北
Sulfides
electron probe
deposit genesis
Liangshuigou Pb-Zn deposit
Northwestern Guizhou
作者简介
第一作者:张馨玉,女,1995年生,硕士研究生,矿物学、岩石学、矿床学专业.E-mail:943016125@qq.com;通讯作者:李波,E-mail: libo8105@qq.com。
