祁连成矿带钨矿成矿特征及其区域找矿标志
Minerogenic features of tungsten deposits in the Qilian metallogenic belt and regional ore indications
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摘要: 提要：在对祁连成矿带内钨的区域成矿地质和地球化学背景，钨及钨多金属矿床地质特征等综合分析基础上，将本区钨及钨多金属矿床初步划分为夕卡岩型、石英脉型、云英岩型以及海相火山岩型等4种类型，指出元古代及早古生代，特别是元古宙各时代的含钨中基性火山岩-碎屑岩和碳酸盐岩地层、与造山构造作用（俯冲造山和/或碰撞造山）有关具有多阶段侵入的以偏碱性和钙碱性成分为主的复式中酸性岩浆侵入体以及多组构造系统复合是本成矿带钨矿床，特别是大型钨矿床的主导控制因素。进一步总结了本区钨矿区域找矿标志。Abstract: Abstract: On the basis of an integrated analysis of the tungsten minerogenic geological and geochemical settings and geological features of tungsten and tungsten-polymetallic deposits, four types of tungsten and tungsten-polymetallic deposits in the Qilian metallogenic belt are primarily distinguished, i.e. skarn type, quartz vein type, greisen type and marine volcanic type. There are three dominant ore-controlling factors for tungsten deposits, especially large ones, in this metallogenic belt, i.e.Proterozoic and Early Paleozoic tungsten-bearing intermediate-basic volcanic-clastic rocks and carbonate rocks, composite intermediate-acid magmatic intrusions mainly of subalkaline and calc-alkaline compositions associated with orogenic processes (subductional orogeny and/or collisional orogeny) and multiple tectonic systems. Furthermore, the regional ore indications of tungsten deposits are summarized.
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