西藏冈底斯中部铁铜矿成矿规律及找矿远景分析  

Prospecting Analysis and Metallogenic Regularity of Iron and Copper in the Middle Gangdese,Tibet

作　　者：曹圣华[1] 王卓[1] 楼法生[1] 黄建村 熊伟[1] 

机构地区：[1]江西省地质调查研究院,南昌330030

出　　处：《地质学报》2014年第11期2108-2118,共11页Acta Geologica Sinica

基　　金：中央地质勘查基金项目"西藏措勤县加不勒-日阿地区铁铜多金属矿普查"(编号2009541002);中国地质调查局"全国重要矿产和区域成矿规律研究"(编号1212010733803)资助的成果

摘　　要：冈底斯中部位于西藏高原腹地,地理位置和构造-成矿带所处的位置十分重要,大地构造位于拉萨-冈底斯陆块中部。中新生代在班公湖-怒江特提斯洋向南俯冲、雅鲁藏布江洋向北俯冲、碰撞构造背景制约下,产生了强烈的构造运动和大规模的岩浆活动,为成矿提供了强大的热动力;多期次火山、岩浆热液的参与,为成矿提供了丰富的物质来源,有利的成矿地质背景从宏观上控制了区内金属矿产的形成。本文在前人研究成果的基础上,依据冈底斯中部地区近期地质勘查成果,运用成矿系列理论,以区域构造-岩浆时空演化特征为主导,探讨了区域成矿规律及成矿潜力,在冈底斯中部初步建立了燕山期与花岗质岩石有关的铜-铁-铅锌-银矿床成矿系列和喜马拉雅期与中酸性花岗质岩石有关的铜-铁-铅锌-金矿床成矿系列等2个矿床成矿系列和6个成矿亚系列;划分了洞错-尼玛锑铜多金属矿带、江马-文部铁铜多金属矿带、达雄-甲谷铜铁多金属矿带、隆格尔-尼雄-措麦铁铜矿带和杰萨错-查孜铜、铀钍多金属矿带等5条铁铜多金属成矿带和22个成矿远景区,指明了找矿方向。The middle Grandise in Tibet is the important component of the Gangdese metallogenic belt in the Qinghai-Tibet Platean, which was studied geologically in obviously lower degree than the southeastern Gangdese. Influenced from both the southward subduction of Bang Co-Nujiang Tethyan Ocena crust and northward subduction of Yarlung Zangbo neo-Tethyan Ocean, Meso-Cenozoic magmnatic activities extremely favourable mineralizing conditions and great potentials of mineral resources. Prospecting and Metallogenic Regularities of Iron and Copper is analyzed by using the Metallogenic Series .On the bases of the features of deposits （ore occurrences） found newly and the space-time distribution of various types of mineralization in the middle Gangdese, five Ⅳ-level metallogenic subzones , i. e. Ⅰ-Dongcuo-Nima copper-antimony polymetallic metallogenic belt,Ⅱ-Jiangma-Wenbu iron copper metallogenic belt,Ⅲ-Daxiong-Jiagu copper iron metallogenic belt,Ⅳ-Ronggeer-Nixiong iron-copper ore occurrences and Ⅴ-Jiesacuo-Chazi copper polymetallic、Uranium thorium metallogenic belt can be divided; and twenty-two Ⅴ-level prospects was redivided into.Two metallogenic series can be defined into,i. e. the metallogenic series of iron deposit involved in the intermediate-acid intrusive rock of Yanshan Period and the metallogenic series of copper polymetallic deposit associated with porphyry of Himalayan period ; and six metallogenic sub-series have been preliminarily distinguished in the Middle Gangdese.

关 键 词：冈底斯中部 铁铜矿 矽卡岩型铁矿 成矿系列 成矿规律 西藏 

分 类 号：P618.31[天文地球—矿床学] P618.41[天文地球—地质学]