山门银矿床围岩蚀变特征与成矿关系及找矿标志

山门银矿为大型独立银矿床，其围岩蚀变特别发育，先后为冷水蚀变作用和热液蚀变作用两期，冷水蚀变作用包括碎裂－红化，伊利石－水白云母化两个蚀变阶段，热液蚀变包括黄铁绢云岩化，硅化，碳酸盐化三个蚀变阶段，两期蚀变与成矿关系极为密切，在时间上具有多期和多阶段性，空间具有明显的分带性，其蚀变特征可作为寻找岩浆热液矿床的标志。

The relation between the characteristics of wall rock alteration in the Shanmen silver deposit and metallogeny,and its indicators for prospecting

The Shanmen silver deposit is a large,independent one.It underwent cold alteration and hydrothermal alteration,with a welldeveloped characteristics.The cold alteration includs two altered stagescataclasisanorthositization,illitehydromuscovitization;the hydrothermal alteration includs three altered stagespyritesericitization,silicification and carbonation.The alteration is closely related with the oreformation in the two altered stages.In time and space,it obviously shows multiple phases,muliti stages and zonation,and the altered characteristics could be an indication for prospecting for magmatic hydrothermal deposits.