Laumontitization as an Exploration Indicator of Epithermal Gold Deposits: A Case Study of the Axi and Other Epithermal Systems in West Tianshan, China  

作　　者：陈衍 鲍景新 张增杰 陈华勇 刘玉琳 

机构地区：[1]Departmemt of Geology, Peking University [2]Guiyang Institute of Geochemistry, Chinese Academy of Sciences

出　　处：《Chinese Journal Of Geochemistry》2003年第4期289-301,共13页中国地球化学学报

基　　金：TheresearchwasfinanciallygrantedbyNNSFC (4 96 72 1 1 9) ;MSTC (Nos.96 Yu39\|0 4 ;96 91 5 0 3 0 5 ) ;EMC (No .0 1 0 0 5andTrans CenturyTeacherProgram)aswellasGuiyangInstituteofGeochemistry ;ChineseAcademyofSciences.

摘　　要：In the light of field investigation, microscopic study, X\|ray phase analysis and mineral infrared spectral analysis, it is considered that laumontitization is of extensive occurrence in the Axi gold orefield. The development of laumontitization and its relationship to mineralization show that the laumontitization appeared mainly at the top of and in the periphery of orebodies, and occurred at the edge of the epithermal system or at the late stage of epithermal system evolution. Therefore, laumontitization can be used as an exploration indicator of epithermal gold deposits. The fluids responsible for laumontitization in the Axi gold orefield are similar to those producing hot spring\|type gold deposits or those from modern geothermal fields. Epithermal mineralization of the Axi gold deposit was dated at Carboniferous, indicating that the West Tianshan of China is a region favorable to epithermal\|type gold mineralization and preservation. Hence the West Tianshan of China is a target area for exploring epithermal gold deposits.In the light of field investigation, microscopic study, X\|ray phase analysis and mineral infrared spectral analysis, it is considered that laumontitization is of extensive occurrence in the Axi gold orefield. The development of laumontitization and its relationship to mineralization show that the laumontitization appeared mainly at the top of and in the periphery of orebodies, and occurred at the edge of the epithermal system or at the late stage of epithermal system evolution. Therefore, laumontitization can be used as an exploration indicator of epithermal gold deposits. The fluids responsible for laumontitization in the Axi gold orefield are similar to those producing hot spring\|type gold deposits or those from modern geothermal fields. Epithermal mineralization of the Axi gold deposit was dated at Carboniferous, indicating that the West Tianshan of China is a region favorable to epithermal\|type gold mineralization and preservation. Hence the West Tianshan of China is a target area for exploring epithermal gold deposits.

关 键 词：AXI GOLD DEPOSIT laumonfitizafion EPITHERMAL GOLD DEPOSIT geothermal metaliogenic system WEST TIANSHAN 

分 类 号：P618.51[天文地球—矿床学]