吉林省四平市山门银矿围岩蚀变特征分析

Analysis of wall rock alteration characteristics of Shanmen silver mine in Siping City, Jilin Province

该矿床分布于印支期石英闪长岩与黄莺屯组大理岩夹变质粉砂岩中,呈超覆侵入的接触带及接触内外带和二长花岗岩岩体内,有石英脉型和蚀变岩型两种工业类型银矿。矿床围岩蚀变极为发育,蚀变岩在空间上呈带状分布,并具有明显的分带现象,矿化蚀变以中—低温热水溶液作用为主。

The deposit is located in the contact zone of overlapping intrusion between Indosinian quartz diorite and Huangyingtun Formation marble-intercalated metamorphic siltstone,the inner and outer contact zone and monzonitic granite body.There are two types of industrial gold deposits:quartz vein type and alteration rock type.The alteration of the surrounding rock is extremely developed,and the alteration rock distributes in zones in space with obvious zoning phenomena.The mineralization alteration is mainly caused by medium to low temperature hot water solution.