西藏拉昂错蛇绿岩含矿杂岩带存在的证据及其找矿意义  

EVIDENCE AND ORE-PROSPECTING SIGNIFICANCE OF EXISTENCE OF ORE-BEARING COMPLEX BELT IN THE LA'ANGCUO OPHIOLITE,TIBET

作　　者：雷义均[1] 黄圭成[1] 徐德明[1] 李丽娟[1] 

机构地区：[1]宜昌地质矿产研究所,宜昌443003

出　　处：《地质与勘探》2008年第3期28-33,共6页Geology and Exploration

基　　金：中国地质调查局"西藏雅鲁藏布江西段铬铁矿资源远景调查"资源评价项目(编号:1212010530108)资助

摘　　要：蛇绿岩体中的含矿杂岩带是豆荚状铬铁矿的主要赋矿层位[3]。拉昂错蛇绿岩体产出富铬型豆荚状铬铁矿。文章主要论证拉昂错蛇绿岩体存在较大规模的含矿杂岩带,通过分析岩体岩石学和矿物学特征、1∶2万高精度磁测成果、深部钻孔资料和岩石显微构造等资料,并与区域上相关的含矿蛇绿岩进行对比,揭示了拉昂错蛇绿岩体含矿杂岩带的空间展布规律,进一步明确了寻找豆荚状铬铁矿的优选靶区。Ore - bearing complex belt in the ophiolite body is the main ore - hosting sites. Cr - rich podiform chromite occurs in the La＇ angeuo ophiolite. Existence of large scale ore - bearing complex belt in the La＇ angcuo ophiolite is proofed. According to petrology and mineralogy, 1：20000 high precision magnetic measurement results, drill hole data and rock micro structures, and compared with ore-bearing ophiolite in the region, distribution regular in space of La＇ angcuo ophiolite is revealed. Optimizing ore prospecting target for podiform chromite is more defined.

关 键 词：拉昂错蛇绿岩 含矿杂岩带 铬铁矿 找矿优选靶区 西藏 

分 类 号：P588.12[天文地球—岩石学]