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本文主要运用流体包裹体的研究方法,研究西榆皮铅矿床成矿流体的物理化学性质,探讨矿床成因及成岩成矿机理。作者进行了野外考察研究,室内研究以流体包裹体为主,并结合铅、硫同位素分析,以及岩石,矿物方面资料,获得了该矿区成岩成矿条件比较系统的资料。研究结果表明,西榆皮铅矿成矿物质主要来源子结晶基底西榆皮混合岩系,虽然矿床经历了复杂的地质演化,但现存的矿物包裹体仍然基本上保持沉积—变质—混合岩化成岩成矿流体特征。因此,西榆皮铅床是一个沉积,变质—混合岩化热液作用再富集的富铅矿床。
In this paper, we mainly use the research methods of fluid inclusions to study the physicochemical properties of ore-forming fluid in the West Yupie lead deposit, and discuss the genesis and diagenesis and mineralization mechanism of the deposit. The author conducted field investigation and research. The laboratory studies mainly focused on fluid inclusions. Combined with the analysis of lead and sulfur isotopes, as well as the data of rocks and minerals, the authors obtained more systematic data of diagenetic and ore-forming conditions in this area. The results show that the metallogenetic material of the West Yupu lead deposit is mainly derived from the West Yuma mixed rock series of the sub-crystalline basement. Although the deposit undergoes complicated geological evolution, the existing mineral inclusions still basically maintain the sedimentary-metamorphic-mixed petrified Rock mineralization fluid characteristics. Therefore, the lead bed of the West Yupi is a sedimentary, metamorphic-hydrothermal mixed hydrothermal enrichment of the lead-rich deposits.