班公湖-怒江成矿带西段主要岩浆热液型矿床成矿特征初探  

A Tentative Discussion on Metallogeny of the Main Magmatic-hydrothermal Ore Deposits in the Western Bangong Co–Nujiang Metallogenic Belt,Tibet

作　　者：王立强[1] 王勇[2] 旦真王修 李宝龙[1] 李壮 李申[3] 范源 李威[5] 龚福志 WANG Li-qiang;WANG Yong;DANZHEN Wang-xiu;LI Bao-long;LI Zhuang;LI Shen;FAN Yuan;LI Wei;GONG Fu-zhi(MLR Key Laboratory of Metallogeny and Mineral Resource Assessment, Institute of Mineral Resources,Chinese Academy of Geological Sciences, Beijing 100037;China University of Geosciences (Beijing), Beijing 100083;Chengdu University of Technology, Chengdu, Sichuan 610059;Geothermal and Geological Party, Bureau of Mineral Resource Exploration and Development of Tibet, Lhasa, Tibet 850000;Geological Survey of Sichuan Province, Chengdu, Sichuan 610081;No.2 Geological Party, Bureau of Mineral Exploration and Development of Tibet, Lhasa, Tibet 850000)

机构地区：[1]中国地质科学院矿产资源研究所,国土资源部成矿作用与资源评价重点实验室,北京100037 [2]中国地质大学(北京),北京100083 [3]成都理工大学,四川成都610059 [4]西藏自治区地质矿产勘查开发局地热地质大队,西藏拉萨850000 [5]四川省地质调查院,四川成都610081 [6]西藏自治区地质矿产勘查开发局第二地质大队,西藏拉萨850000

出　　处：《地球学报》2017年第5期615-626,共12页Acta Geoscientica Sinica

基　　金：中国地质调查局地质调查项目(编号:DD20160026);国家自然科学基金项目(编号:41403040)联合资助~~

摘　　要：文章对班公湖—怒江成矿带西段与岩浆热液有关的主要矿床空间分布、矿化类型进行了总结;对主要成矿事件形成时代进行了统计,识别出6期成矿事件,分别为晚侏罗世早期、晚侏罗世晚期、早白垩世晚期、晚白垩世中期、晚白垩世晚期和中新世。基于前人研究成果,对主要矿床地质特征、成矿岩浆岩基本地质特征、岩石地球化学特征进行了阐述和对比研究,明确了成矿岩体特征之差异。通过对班—怒成矿带西段主要矿床成矿岩体锆石Hf同位素和辉钼矿Re含量的梳理,阐明了成岩-成矿物质源区差异与矿化元素组合之间的耦合关系,即幔源物质参与成矿强度大,形成铜金矿。最后,文章对区域成矿特征进行了总结梳理,并提出了班公湖—怒江成矿带西段可望取得找矿新进展的矿床类型和找矿方向。With magmatic-hydrothermal mineralization as the topic,this paper summarized the spatial distributionand mineralization types of the main ore deposits in the western Bangong Co–Nujiang metallogenic belt andinvestigated their metallogenic epochs.Six mineralization events were recognized,i.e.,the early stage of LateJurassic,the late stage of Late Jurassic,the late stage of Early Cretaceous,the middle stage of Late Cretaceous,the late stage of Late Cretaceous,and the Miocene period.On such a basis,this paper illustrated the mineralizationfeatures of the main ore deposits and compared the differences of basic geological characteristics,major elements,rare earth elements and trace elements compositions between the ore-forming intrusions.Based on studying Hfisotope of zircons from ore-forming intrusive rocks and Re content of molybdenite of the main ore deposits,the authors clarified the relationship between different diagenetic-metallogenetic material sources and mineralizationelements associations,i.e.,the more mixed mantle derived materials in the ore-forming process,the more possiblethe formation of the Cu-Au mineralization association.Based on the current prospecting and exploration extent,the regularity of the main magmatic-hydrothermal ore deposits was summarized,and the deposit types expectedto make breakthrough and their corresponding target areas were also analyzed.

关 键 词：岩浆热液型矿床 岩浆岩特征 成岩成矿物质源区 矿化元素组合 班公湖-怒江成矿带西段 

分 类 号：P611.13[天文地球—矿床学] P618.41[天文地球—地质学]