Shilei mining region is an important quartz-vein-type tungsten-tin deposit that located in the north of Xihuashan-Zongshukeng NNE tectonic-magmatic metallogenic belt of southern Jiangxi. By conducting tunnel geological mapping and cataloging, this paper analyzes the geometry, structural and constructional characteristics of ore-bearing veins groups, quart-veins and ore body. Data of occurrences of ore-veins and ore-related fault were collected by using the stereographic projection analysis. The results showed that Shilei ore-bearing quartz veins were EW-NEE direction, with lateral en echelon arrangement. A comprehensive analysis on the geological setting showed that the mineralization fracture were formed by NEE dextral compression-shear stress field, then generated EW-NEE direction fracture. The post-magmatic hydrothermal ore-bearing fluid used these fracture for mineralization in Shilei mine area. The faults after mineralization were with slight displacement in the veins with unchanged whole distribution vein. The characteristic of mineralization fracture and tectonic stress were analyzed by pointing out prospecting direction.%赣南石雷钨锡矿是西华山—棕树坑NNE构造—岩浆—钨锡成矿带北段重要的石英脉型钨锡矿床.通过矿山坑道填图及编录,对矿脉组、矿脉和矿体的几何形态、结构构造进行观测,对矿脉及成矿后断裂产状进行统计,并利用赤平投影进行构造解析.结果显示:石雷含矿石英脉整体呈EW-NEE走向,北倾为主,具尖灭侧现,脉体、脉组及脉带之间均以右行斜列为主;结合区域地质背景综合分析认为石雷矿区在NEE向右行走滑形成的压扭性应力场作用下,产生EW-NEE向断裂构造,岩浆侵位期后含矿热液利用断裂充填成矿,成矿后断裂构造对矿脉具有错动破坏作用,但错动距离小,并未改变矿脉的整体展布;对石雷矿区成矿断裂分布特征及其成因分析,指出矿区找矿方向,并划出三处成矿有利部位.
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