西藏尕尔穷铜矿床金银矿物特征及赋存状态  

Research on Au-Ag characteristics and occurrence state of Ga'erqiong copper deposit,Tibet,China

作　　者：龚婷婷[1] 肖渊甫[1] 任科法[1] 李志军[1] 杨玲[2] 何佳乐[1] 单阳威[1] 何建娟[1] GONG Ting—ting;XIAO Yuan—fu;REN Ke—fa;LI Zhi-jun;YANG Ling;HE Jia—le;SHAN Yang—wei;HE Jian—juan(College of Earth Sciences,Chengdu University of Technology,Chengdu 610059,China;Bureau of Exploration and Development of Geology and Mineral Resources of Jiangxi,Nanchang 330002,China)

机构地区：[1]成都理工大学地球科学学院,成都610059 [2]江西省地质矿产勘查开发局,南昌330002

出　　处：《成都理工大学学报(自然科学版)》2013年第2期139-146,共8页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：国家公益性行业科研专项(201011013-3)

摘　　要：西藏尕尔穷铜矿床位于班公湖-怒江成矿带西侧,是成矿带中重要且具有代表性的矽卡岩型铜矿床。由于对矿石的研究程度较低,制约了成矿作用、矿床成因的深入研究,限制了矿床进一步的综合开发利用。通过野外地质调查采样,利用显微镜鉴定、扫描电镜观察、X射线能谱仪及电子探针成分分析测试、矿物晶体化学式计算等手段和方法,对矿石成分、金银的赋存状态及主要载金矿物的特征进行研究。结果表明,成矿过程经历了岩浆热液成矿期和表生风化期,岩浆热液期是金的主要成矿期。金银主要以互化物的形式产出,以粒间金、包体金为主,裂隙金和薄膜金其次。载金矿物主要为铁氧化物、铁铜硫化物及石英等脉石矿物。矿床成因类型为岩浆热液接触交代成因的矽卡岩型铜金矿床。The Ga'erqiong copper deposit is an important and representative skarn type copper deposit.It is located on the west side of the Bangong lake-Nujiang river metallogenic belt.Because the research degree of the ore is low,the deep study of the mineralization and ore genesis as well as the further comprehensive development and utilization of the deposit are limited.The authors make a detailed and systematic study of the ore composition,gold-silver occurrence state and gold-hearing minerals by means of field geological survey and sampling,microscopic observation,scanning electron microscopy,X-ray energy spectrum analysis,electron probe composition analysis,and mineral crystal chemical formula calculation.The results show that the ore-forming process experienced the magmatic hydrothermal period and supergene weathering period while the gold formed in the former.The gold and silver occur mainly as intercrystalline gold and inclusion gold in the form of intermetallic compounds,then fissure gold and film gold.The gold-bearing minerals are iron oxides,metal sulfides,quartz,and so on.The genesis type of the Ga'erqiong copper-gold deposit belongs to the skarn type caused by post-magmatic hydrothermal contact metasomatism.

关 键 词：金银矿物 赋存状态 铜矿床 尕尔穷 西藏 

分 类 号：P578.11[天文地球—矿物学]