东秦岭地区中生代金钼多金属矿C-H-O同位素组成研究

文章在系统收集近年来东秦岭地区主要的钼、金、铅锌银矿C-H-O同位素数据分析的基础上,对区内的C-H-O同位素组成进行了综合研究。其结果认为东秦岭钼金多金属矿床的成矿流体来源极为相似,初始成矿流体均为与岩浆活动有关的高温深源流体,随着岩浆活动和成矿作用的进行,大气降水与地壳岩石水岩反应作用后的浅源流体不断加入其中,使得矿床的成矿流体表现深源流体和具有雨水性质的浅部流体的混合特征;富含成矿物质的成矿流体聚集在地壳下部的拆离带,与下部地壳岩石相互作用,形成复杂的流体-岩浆混合体系,受构造运动控制,在不同的地球物理化学边界层沉淀成矿。

A study on the C-H-O isotopic compositions of the Mesozoic gold and molybdenum polymetallic deposits in eastern Qinling

Based on analysis of resent C-H-O isotopic results from Mo,Au,Pb-Zn-Ag deposits in eastern Qinling orogenic belt is comprehensively studied the C-H-O isotopic compositions which show similar source of ore fluid of the deposits.The primitive fluid is the high temperature-deep sourced fluid related to magmatism.With progress of the magmatism and mineralization is incorporated the post meteoric water rock interaction shallow fluid which is characterized by mix of deep source fluid and meteoric water.The ore material-rich fluid is accumulated in detachment zone at lower crust and interacted with rocks there to form complex fluid-magma mix system.Under control of tectonic movement the system precipitated ore at different physical and chemical boundaries.