北山成矿构造背景概论  

General Discussion on Metallogenitic Tectonic Setting of Beishan Mountain,Northwestern China

作　　者：杨合群[1] 李英[2] 李文明[1] 杨建国[1] 赵国斌[1] 孙南一[1] 王小红[1] 谭文娟[1] 

机构地区：[1]西安地质矿产研究所,陕西西安710054 [2]长安大学,陕西西安710054

出　　处：《西北地质》2008年第1期22-28,共7页Northwestern Geology

基　　金：中国地质调查局“北山成矿带找矿重大疑难问题研究”项目(编号:1212010531602)资助

摘　　要：北山地区可划分为星星峡-明水-旱山微板块和敦煌微板块,二者以红柳河-牛圈子-洗肠井缝合带为界。古陆裂解初期的寒武纪浅海具有形成磷钒铀锰沉积矿产的有利背景;奥陶纪洋盆和弧后盆地具备形成海相火山-沉积岩系有关铜锌矿的有利背景,被动陆缘裂谷具备形成海相沉积岩系有关铅锌银矿的有利背景;志留—泥盆纪岛弧火山建造具备形成斑岩铜矿的有利背景;石炭—二叠纪陆内裂谷具备形成火山沉积铁矿、斑岩铜矿、基性-超基性岩有关铜镍矿的有利背景;各单元古陆壳活化重熔型花岗岩具形成钨锡稀有金属矿的有利背景。Beishan mountain area can be devided by Hongliuhe-Niuquanzi-Xichangjing ophiolite belt into two parts： Xingxingxia-Mingshui-Hanshan micro-plant and Dunhuang micro-plant. In Ordovician ocean basin and back-arc basin, volcano-sedimentary type copper-zinc minerals can be formed; in passive continental margin, lead-zinc minerals are hosted in volcano-sediment rock system. Silurian-Devonian island-arc volcanic formation may be hosted in rock full of porphyry copper deposits. The volcanosedimentary type iron minerals may occur in Carboniferous-Permian continental rift sedimentary formation, porphyry copper deposits and copper-nickel deposits of basic rock type. The palaeocontinunt crust melting type granite mass is metallogenetic matrix of W, Sn, rare metal deposits.

关 键 词：北山成矿带 构造单元 成矿背景 

分 类 号：P542.2[天文地球—构造地质学] P613[天文地球—地质学]