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研究了北祁连山造山带火山成因块状硫化物矿床(VMS)类型、金属来源与容矿围岩、火山岩类型及其构造环境的关系。结果表明,容矿岩石和地壳性质是控制矿床类型和金属来源的主要因素。多金属黑矿型矿床主要赋存于硅铝质陆壳边缘裂陷带双峰火山岩系的酸性火山岩中,成矿元素源于深部长英质岩石,铜型矿床产于洋壳基性火山岩中,成矿元素源于深部镁铁质岩石。中寒武统双峰火山岩所赋存的多金属VMS矿床多、规模大,是主要含矿岩系。
The volcanic genetic type sulfide deposits (VMS), the source of metals and the host rocks, volcanic rocks and tectonic setting of the northern Qilian orogenic belt are studied. The results show that the ore-bearing rocks and crustal properties are the main factors controlling the type of deposit and the source of metal. The polymetallic ores are mainly hosted in acidic volcanic rocks with bimodal volcanic rocks in the marginal rifting zone of the aluminous continental crust. The ore-forming elements originate from the deep feldspathic quartzites. The copper deposits occur in the basement volcanics of the oceanic crust. Metallogenic elements originate from deep mafic rocks. The multi-metal VMS deposits hosted by the Middle Cambrian and the Shuangfeng volcanic rocks are large in scale and are the major ore-bearing rock series.