青海索拉沟铜多金属矿床地球化学特征及矿床成因讨论

依据青海索拉沟铜多金属矿床地质地球化学特征,特别是矿床物质来源、矿物、元素分带、成矿热液演化中铜多金属矿床的性状,对该矿床的地质特征、矿床成因及控矿条件进行了研究。研究表明,该索拉沟铜多金属矿床属火山沉积—热液改造型矿床,其矿床经历了沉积成岩和热液改造两个阶段。中三叠世海底火山喷发喷气活动携带大量成矿物质,在浅海台地相对低洼的部位（还原条件下）与火山碎屑物、陆源物一起沉积下来,形成了最初的＂矿源层＂或贫矿层,在随后的（印支期）造山过程中,受强烈构造-岩浆活动的作用,地层中岩石脱水、成矿元素活化、聚集形成富矿溶液,并沿地层层理、岩石破裂运移,交代岩石中化学性活泼的组分或充填于岩石裂隙中富集成矿。

Discussion on Geochemical Characteristics and Genesis of Solagol Copper Polymetallic Ore Deposit in Qinghai

Based on Solagol copper polymetallic ore deposit geological, geochemical characteristics, especially ore deposit material provenance, minerals, elements zoning, copper polymetallic ore deposit properties and state during ore forming hydrothermal evolution carried out studies on ore deposit geological features, deposit genesis and deposit controlling factors. The study has shown that the ore deposit belongs to volcanic deposit—hydrothermal transformed type has experienced two stages of deposit and transform. Middle Triassic submarine volcanic eruption brought along a mass of ore-forming material, then deposited with pyroclasts and terrigenous compositions on relatively low part of shallow sea platform（under reducing condition） and formed initial＂source bed＂or＂lean bed＂, during the following Indo-Chinese epoch orogenic process, impacted by strong structural and magmatic activities, rock dehydration, metallogenic element activated, brought together and formed pay solution, then migrated along strata bedding, rock fractures and replaced chemically active components in rocks or filled in fractures enriched into ore deposit.