西藏羌堆-山南地区铜多金属成矿特征及找矿方向  

Metallogenetic Characteristics and Prospecting Direction of the Cu Polymetallic Deposit in Qiangdui-Shannan Area of Tibet

作　　者：秦志平[1] 李秋平[1] 

机构地区：[1]中国冶金地质总局第二地质勘查院,福建莆田351111

出　　处：《地质与勘探》2011年第1期36-42,共7页Geology and Exploration

基　　金：中国地质调查局项目(编号:1212010732707)资助

摘　　要：羌堆-山南地区处于西藏冈底斯铜多金属成矿带东南部,成矿条件优越,已发现多处大中型铜多金属矿床。矿床类型有矽卡岩型、斑岩型及二者复合型。区域含矿层位为比马组(K1b)、门中组(K1-2m)和多底沟组(J3d)。与成矿相关的岩浆岩地球化学成分表现为富Na(或K)、高Sr、贫重稀土的特点。矿床在空间分布上受控于东西向火山岩浆弧带,并具有等距性分布,成带分片集中的特征。文章通过总结其成矿地质特征以及成矿与地层、侵入岩的关系,并根据羌堆-山南地区成矿条件和潜力,提出找矿方向和靶区。The Qiangdui-Shannan area,in which several middle to large-sized Cu polymetallic deposits have been found,is located in the southeastern part of the Gandise Cu polymetallic metallogenic belt with the superior condition of ore-formation.There are skarn,porphyry,and the compound of skarn and porphyry types of deposits.Ore-bearing horizon in this area starts from Bima group（K1b）,Menzhong Group（K1-2m）and Duodigou Group（J3d）.The geochemistry component related to mineralization is characteristic of being rich in Na（or K）and Sr,poor in heavyrare-earth elements.Under the control of East-west volcanic arc zone,this deposit if equidistant distributed and focused with belts and fragments.This paper is going to the geological characteristics of ore-formation and the relationship between strata,intrusives and the Cu polymetallic mineralization have been summarized in this paper.The prospecting aspects and targets have been proposed based on the ore-forming condition and potential in Qiangdui-Shannan area.

关 键 词：羌堆-山南地区 铜多金属矿床 成矿条件 成矿特征 找矿方向 

分 类 号：P618.51[天文地球—矿床学] P618.41[天文地球—地质学]