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

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