西藏尼木岗讲斑岩铜钼矿床地质特征及成矿机理  

Geological Characteristics and Metallogenic Mechanism of Copper-molybdenum Deposit in Gangjiang,Nimu,Tibet

作　　者：杨震 杨明国[2] 梅红波[2] 姜华 胡光道[2] YANG Zhen;YANG Mingguo;MEI Hongbo;JIANG Hua;HU Guangdao(Faculty of Geodesy and Geomatics,Anhui University of Science and Technology,Huainan 232001,China;Faculty of Earth Resource,China University of Geosciences,Wuhan 430074,China;Yunnan Copper Industry（Group）Co.,Ltd,Kunming 650051,China)

机构地区：[1]安徽理工大学测绘学院,安徽淮南232001 [2]中国地质大学资源学院,武汉430074 [3]云南铜业(集团)有限公司,昆明650051

出　　处：《有色金属工程》2018年第4期106-110,121,共6页Nonferrous Metals Engineering

基　　金：国家重点基础研究发展计划(973计划)项目(2009CB421007)

摘　　要：西藏尼木岗讲铜钼矿床是冈底斯成矿带重要的矿床之一。为寻求找矿突破,加快岗讲矿区探矿工作步伐,基于野外地质调查和室内分析工作总结,从区域地质背景、矿区地质特征、矿体特征等方面分析该矿床地质特征,结合成岩成矿时代,探讨矿床成矿机理。结果表明,岗讲矿床属于斑岩型矿床,矿体多数由斑岩体内接触带细脉-浸染型板状铜钼矿(化)体构成,二长花岗斑岩是最主要的赋矿岩石。在中新世印度-亚洲大陆后碰撞伸展构造环境下,两期含矿热液沿岩体裂隙叠加贯入是成矿关键。Gangjiang copper-molybdenum deposit,which is located in Nimu,Tibet,is one of the most important deposit in Gangdese metallogenic belt. In order to seek the breakthroughs in ore exploration and accelerate the progress of the prospecting work in Gangjiang mining area,on the basis of field surveys and laboratory analysis,the geological characteristics of Gangjiang deposit were analyzed in detail from the regional geological background,geological characteristics of the mine area and the orebody features. The metallogenic mechanism was analyzed combining with the diagenesis and mineralization age. The results show that,Gangjiang deposit belongs to porphyry deposit,and most of the ore bodies are composed of Cu-Mo mineralization body of veinlet disseminated type in porphyry body contact zone,and monzogranite porphyry is the most important ore bearing rock. In the post collisional extensional tectonic setting of the Miocene Indian-Asian continent,. two phases of ore-bearing hydrothermal fluids are superimposed along the cracks of the rock mass,which is the key to mineralization.

关 键 词：岗讲铜钼矿床 斑岩型 地质特征 成矿机理 

分 类 号：P613[天文地球—矿床学] P617[天文地球—地质学]