湖南宝山铜铅锌多金属矿床矿物学特征及其地质意义  

Mineral Characteristics and Geological Significance of the Baoshan Cu-Pb-Zn Polymetallic Deposit in Hunan Province

作　　者：齐钒宇[1,2] 张志 祝新友[3] 李永胜[1,4] 甄世民[1,4] 公凡影[1,4] 巩小栋[5] Qi Fanyu;Zhang Zhi;Zhu Xinyou;Li Yongsheng;Zhen Shimin;Gong Fanying;Gong Xiaodong(Development and Research Center, China Geological Survey, Beijing 100037, China;National Geological Archives of China, Beijing 100037, China;Beijing Institute of Geology and Mineral Resources, Beijing 100012, China;Mineral Exploration Technical Guidance Center of Ministry of Land and Resources, Beijing 100083, China;Chengdu Center of China Geological Survey, Chengdu 610081, China)

机构地区：[1]中国地质调查局发展研究中心,北京100037 [2]全国地质资料馆,北京100037 [3]北京矿产地质研究院,北京100012 [4]国土资源部矿产勘查技术指导中心,北京100083 [5]中国地质调查局成都地质调查中心,成都610081

出　　处：《吉林大学学报（地球科学版）》2018年第3期754-768,共15页Journal of Jilin University：Earth Science Edition

基　　金：全国危机矿山接替资源找矿项目(20089927)~~

摘　　要：宝山铜铅锌多金属矿床位于我国南岭成矿带中段北缘,是南岭成矿带中的重要类型之一。宝山矿床具有明显的水平分带性,即以花岗闪长斑岩为中心的铜钼矿化,周边是铅锌银矿化。本文通过对宝山铜铅锌多金属矿床中的石榴子石、透辉石、黄铁矿、闪锌矿等矿物进行矿物学研究及电子探针测试分析,归纳总结出:宝山铜铅锌多金属矿床成矿期次为矽卡岩阶段、退变质与氧化物阶段、硫化物阶段;矿床石榴石端员组分总体以钙铁榴石(23.48%~90.39%)为主,其次为钙铝榴石(5.81%~71.27%);辉石的成分端员以透辉石(Di_(61-95))为主,石榴子石成分和透辉石组分与世界上典型矽卡岩型铜矿的石榴子石和透辉石组分十分相似,属于典型的矽卡岩型铜矿床。从宝山铜铅锌多金属矿床硫化物中黄铁矿、闪锌矿矿物成分组成可以看出,该矿床硫化物为岩浆热液成因,并呈现出北东向比南西向成矿温度高的特征。The Baoshan Cu-Pb-Zn polymetallic deposit is located in the central Nanling mineralization zone,and is an important type of deposit in the Nanling polymetallic deposit belt.The Baoshan Cu-PbZn polymetallic deposit shows the horizontal mineralized zoning clearly.Its zonation is comprised of CuMo belt and Pb-Zn-Ag belt at the mining area from the middle to the periphery.In this research,the mineralogical study and electronic detection tests on the garnets,diopsides,pyrites,and sphalerites in the Baoshan Cu-Pb-Zn polymetallic deposits were conducted,and the mineralization was summarized as the skarn,retrograde and oxide,and sulphide stages.The garnet endmembers are mainly andradite（23.48%-90.39%）and followed by grossular（5.81%-71.27%）;Pyroxenes are mainly diopsides（Di61-95）.The mineral characteristics of garnet and diopside in the skarn are similar to those in typical Cu skarn all over the world.The composition of the pyrite and sphalerite in the sulfides of the Baoshan Cu-Pb-Zn polymetallic deposit indicates that the sulfides in the Baoshan Cu-Pb-Zn polymetallic deposits were from a magmatic hydrothermal source,and is characterized by a higher temperature in the northeast than in the southwest.

关 键 词：矿物学 电子探针分析 宝山铜铅锌多金属矿床 南岭成矿带 

分 类 号：P618.4[天文地球—矿床学]