Abstract: Through field investigation, microscopic study, X-ray phase analysis and mineral infrared spectrum analysis, the authors determine the laumontitization had occurred widely in the Axi gold field. According to the development of laumontitization and its relationship to mineralization, authors reveal that the laumontitization appeared mainly at the top and periphery to ore-bodies. It befallen at the edge of the geothermal fluid system or happened in the late stage of geothermal fluid system evolution, hence can be assigned as an indicator to prospect for epithermal gold deposit. The fluid causing laumontitization in the Axi gold deposit is similar to those causing hot spring type gold deposit or in modern geothermal field.The fluidization of the Axi gold deposit happened in Carboniferous, showing the West Tianshan is a good district for epithermal gold mineralization and preservation. So west Tianshan is prospecting for exploring epithermal gold deposit.

Key words: the Axi gold deposit, laumontitization, epithermal gold deposit, geothermal fluid minerogenetic system, West Tianshan

摘要： 通过野外考察、显微镜下薄片鉴定、X射线物相分析和矿物红外光谱等研究，确定了阿希金矿浊沸石化的普遍存在；根据浊沸石化发生的规律及其与矿床形成的关系，确定浊沸石化主要见于矿体的上部和外围，发育在地热流体系统的边缘和演化晚期，可作为寻找浅成低温热液型金矿的标志之一。导致阿希金矿浊沸石化的流体性质与热泉型金矿成矿流体和现代地热田类似，流体作用发生在石炭纪，证明西天山地区具有良好的浅成低温热液型金矿的形成和保存环境，因此找矿前景较好。

关键词: 浊沸石化, 浅成低温热液型金矿, 地热流体成矿系统, 西天山, 阿希金矿