浅析甘肃西成铅锌矿集区成矿地质条件及找矿前景

Analysis of metallogenic geological conditions and prospecting prospects of Xicheng lead zinc ore concentration area in Gansu Province

深入分析西成矿集区的成矿地质条件对该区的找矿工作具有重要的指导意义,论文介绍了西成铅锌矿集区的区域地质背景,并结合前人研究成果,较全面系统地分析了西成矿集区的成矿地质条件,最后对该矿集区的找矿前景进行了探讨。主要结论如下:①西成铅锌矿田处在秦岭勉略缝合带与商丹缝合带夹持的泥盆系分布区,矿床主要赋存在中泥盆统碎屑岩-碳酸盐岩建造中;②西成铅锌矿田矿床类型均为SEDEX型铅锌矿床,但南、北矿带铅锌矿床的成矿作用过程略有差异;③结合赋矿地层、矿床(点)分布特征及矿床成因等来看,甘肃西成矿集区的东西延长部位及南矿带深部大规模喷流作用的地区找矿前景很大。

In this paper,the regional geological background of Xicheng lead-zinc ore concentration area is introduced,and the metallogenic geological conditions of Xicheng lead-zinc ore concentration area are comprehensively and systematically analyzed based on the previous research results.Finally,the prospecting prospect of this ore concentration area is discussed.The main conclusions are as follows;①Xicheng lead zinc ore field is located in the Devonian distribution area between MIANLUE suture zone and Shangdan suture zone in Qinling Mountains.The deposits are mainly hosted in the clastic carbonate formation of Middle Devonian;②The deposit types of Xicheng lead-zinc ore field are SEDEX type,but the metallogenic processes of lead-zinc deposits in the South and North ore belts are slightly different;③According to the ore bearing strata,the distribution characteristics of ore deposits(points)and the genesis of ore deposits,there is a great prospect for ore exploration in the east-west extension part of the Western metallogenic concentration area and the area with large-scale deep exhalation in the South ore belt of Gansu Province.