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玉西银矿床产在中元古界长城系星星峡群黑云斜长片麻岩和蓟县系卡瓦布拉克群大理岩间的韧性剪切带、韧脆性破碎带中；矿体呈脉状、透镜状和似层状；矿石由辉银矿、方铅矿、闪锌矿、黄铜矿、石英和黄铁矿等４０余种矿物组成；围岩蚀变有硅化、黄铁矿化和碳酸盐化；经历热液成矿期、叠加成矿期和表生成矿期。矿质源自地壳浅部和深部岩石，介质来自地壳封存水、变质水和雨水的混合水，热源主要来自地壳圈层剪切热。在同构造、中低温、中低压、中低盐度、弱碱性、弱还原、浅成超浅成条件下形成破碎蚀变岩型银矿床。矿床具有矿质多源性、成矿多期性、环境差异性特点，可用构造动力作用同一性、空间范围协调性和多期成矿叠加性加以统一解释，构成同一成矿体系，对找矿有指导意义。
The Yuxi silver deposit is produced in ductile shear zone and ductile-brittle fracture zone between the Xinglingxia Group plagioclase gneiss in the Paleoproterozoic Great Wall and marble in the Kavaburak group in the Jixian Formation. The ore body is veins , Lenticular and stratified; the ore is composed of more than 40 kinds of minerals such as galena, galena, sphalerite, chalcopyrite, quartz and pyrite; the alteration of wall rocks is silicification, pyrite and Carbonation; experiencing hydrothermal mineralization, superposition of mineralization and epigenetic mineralization. Minerals originate from shallow crust and deep crust. The medium comes from crustal seal water, mixed water of metamorphic water and rainwater, and the heat source is mainly from the shear heat of the crustal layer. In the same structure, medium and low temperature, medium and low pressure, low salinity, weak alkaline, weakly reduced, shallow to ultra-shallow crust conditions alteration rock silver deposit. The deposit is characterized by multi-mineralization, multi-period mineralization and environmental difference. It can be uniformly explained by the tectonic dynamic identity, the coordination of spatial extent and multi-stage mineralization superimposition, forming the same metallogenic system, Guiding significance.