北祁连山大坂大岔地区蛇绿岩含矿性  

Ore-bearing property of ophiolite in Daban-Dacha area , North Qilian Mts.

作　　者：杨合群[1] 宋忠宝[1] 王兴安[1] 李向民[1] 李文明[1] 李长安[1] 张瑞林[1] 赵东宏[1] 

机构地区：[1]西安地质矿产研究所,陕西西安710054

出　　处：《西北地质》2003年第3期50-56,共7页Northwestern Geology

基　　金：中国地质调查局"甘肃北祁连山错沟-寺大隆一带铜矿预测与评价"项目的部分成果

摘　　要：北祁连山大坂大岔地区蛇绿岩有关矿产可划分为两个矿化系列:1蛇绿岩同生矿化系列,指蛇绿岩套形成过程随之形成的矿产组合,已知有与变质橄榄岩有关的岩浆成因铬铁矿,基性火山岩有关的海底热液成因块状硫化物铜矿;2蛇绿岩后生矿化系列,指蛇绿岩套形成之后再造形成的矿产组合,已知有破碎带蚀变岩型铜矿和银矿。The mineral resources related to ophiolite in Daban-Dacha area of North Qilian Mts., may be divided into the following two series of mineralization:(1) Syngenetic series of mineralization in the ophiolite,i. e. mineral resources assemblage formed along with forming process of the ophiolite suit , magmatogenic chromite ore related to the metamorphic peridotite and hydrothermal massive sulfide copper ore at seafloor was known to us.(2) Epigenetic series of mineralization in the ophiolite, i. e. mineral resources assemblage recomposed after forming process of the ophiolite suit , altered rock type copper ore and silver ore in fracture zone was known to us.

关 键 词：北祁连山 大坂大岔 蛇绿岩 同生矿化系列 后生矿化系列 含矿性 矿产 铬铁矿 块状硫化物铜矿 

分 类 号：P618.33[天文地球—矿床学] P618.41[天文地球—地质学]