青藏高原片麻岩穹窿与找矿前景  

The Gneiss Domes in Tibetan Plateau and Their Potential for Prospecting

作　　者：许志琴[1] 付小方[2] 马绪宣 戚学祥[1] 吴婵[1] 侯立伟[2] 赵中宝[1] 

机构地区：[1]中国地质科学院地质研究所国土资源部大陆构造与动力学重点实验室,北京100037 [2]四川省地质调查院,成都610081

出　　处：《地质学报》2016年第11期2971-2981,共11页Acta Geologica Sinica

基　　金：国家自然科学基金项目(编号40921001;41502198;41430212;41202153;41472198);国土资源部公益性行业基金项目(编号201511022);中国博士后科学基金项目(编号2015M571083;2016T90122);中国地质调查局项目(编号1212010818094;12120115026801;DD20160022)资助的成果

摘　　要：片麻岩穹窿是研究俯冲-折返和碰撞-折返造山过程的重要窗口。已查明的大量青藏高原片麻岩穹窿(群)分布在古特提斯和新特提斯大洋俯冲-折返以及地体碰撞-折返过程中。松潘-甘孜造山带中雅江甲基卡片(麻)岩穹窿的三叠纪变质片岩的含矿伟晶岩脉中发现了超大型锂矿床,揭示片(麻)岩穹窿构造与同构造花岗岩、含矿伟晶岩脉以及大型印支滑脱带在时空和成因上有天然联系,为片麻岩穹窿的找矿前景提供了范例。The gneiss dome is an important tool to reveal the orogeny processes of subduction-exhumation and collision-exhumation. In the Tibetan Plateau, many gneiss dome swarms are distributed in the Paleotethyan and Neotethyan terranes, formed during the subduction-exhumation and/or collision- exhumation process. Superlarge spodumene deposit has been discovered in the pegmatite veins intruded the schist of the Triassic Jiajika gneiss dome in the $ongpan-Ganze orogen, showing close spatio-temporal linkage between gneiss domal structure, syn-tectonic granite, ore-bearing pegmatite, and indosinian large decollement zone. The prospecting and exploration of relevant deposits in gneiss domes are a target in the future.

关 键 词：甲基卡 锂矿 片麻岩穹窿 造山 青藏高原 

分 类 号：P542[天文地球—构造地质学] P612[天文地球—地质学]