陕西双王金矿床成因的再认识

A Further Understanding on Genesis of Shuangwang Gold Deposit in Shaanxi Province

通过对双王金矿床钠长角砾岩的地质特征、地球化学特征进行综合分析,认为钠长角砾岩为隐爆角砾岩,与之相伴的钠长板岩由热液交代形成,钠质可能来源于基底新元古代耀岭河群富钠变质火山岩。形成钠长岩的流体是一种与同熔岩浆活动有关的富含钠质、挥发分的类岩浆流体。金矿床主要是在爆破作用之后的热液充填交代阶段形成的,双王金矿成因类型为隐爆角砾岩型金矿。

Through a comprehensive analysis for geological features and geochemistry features of albite breccia of Shuangwang gold deposit, we consider that the albite breccia is a sort of hidden exploding breccia, and the albite slate associated is formed by hydrothermal metasomatic, sodic might be derived from neoproerozoic basement Yaolinghe group of sodium-rich metamorphic volcanic rocks. The fluids of forming albitite is a magmatic fluids riched in sodium and volatile, which is closely related to the syntexis magmatism. The main gold mineralization occurred in the hydrothermal filling metasomatic stage after blasting action. The genetic type of Shuangwang gold deposit is hidden exploding breccia type gold deposit.