北祁连山火山成因块状硫化物矿床的金属来源研究

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名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，是主要含矿矿岩

STUDY FOR METAL SOURCE OF VOLCANOGENIC MASSIVE SULFIDE DEPOSITS IN NORTH MTS

The relationships between VMS types,source of metal,host rock,volcanic rock types and tectonic setting have been studied in this paper.It were indicated that host rocks and crust station were important factors which controlled ore type and source of metal.The polymetallic Kuroko deposit existed at the acid volcanic rock of bimodel volcanic rock system from marginal fissure of silico aluminum continental crust.The ore forming element was from deep felsic .The copper type deposit existed at base volcanic rocks of oceanic crust.The ore forming elements was from deep mafic rocks.The bimodel volcanic rocks of Middle Cambrian are major host rocks containing many polymetallic VMS deposits with larger scale.