赣西蒙山岩体东侧矿化蚀变带成矿地质条件及找矿潜力

Metallogenic geological conditions and prospecting potentiality of mineralized alteration zone in eastern Mengshan rock mass,western Jiangxi

蒙山岩体东侧矿化蚀变带是钦-杭成矿带江西段新发现的铜多金属矿化蚀变带。将该蚀变带的区域地质特征、矿化蚀变、地球物理和地球化学异常等与世界著名的钨铜矿床——朱溪钨铜多金属矿进行综合对比发现,二者在控矿层位、控矿构造和成岩成矿时代等方面十分相似。此外,蒙山岩体东侧的浅表矿化蚀变、物化探异常特征及岩脉分布情况表明,其深部可能存在隐伏岩体。结合岩体与碳酸盐岩接触带、层间破碎带和断裂破碎带接触部位地质特征推测,花岗质岩浆侵入至碳酸盐岩中发生接触交代形成矽卡岩型矿床。蒙山岩体东侧岩体与碳酸盐岩接触带、层间破碎带和断裂破碎带接触部位具有铜多金属矿良好找矿潜力。

The mineralized alteration zone in eastern Mengshan rock mass is a copper-polymetallic mineralized alteration zone newly discovered in Qinzhou-Hangzhou metallogenic belt(Jiangxi section).The regional geological characteristics,mineralized alteration,geophysical and geochemical anomalies of this alteration zone are compared with that of Zhuxi tungsten-copper polymetallic deposit,a world famous tungsten-copper deposit,and it is found that the two are very similar in ore-controlling horizon,ore-controlling structure and diagenetic and metallogenic age.In addition,the mineralized alteration in neer-surface,geophysical and geochemical anomaly characteristics and magmatic vein distribution in the eastern Mengshan rock mass indicate that there may be hidden pluton in the deep.Based on the geological characteristics of the contact zone between rock mass and carbonate rocks,interbedded fracture and fracture zone,it is speculated that the granitic magma is intruded into the carbonate rocks and undergoes contact metasomatism,to form skarn type deposit.The contact zone between rock mass and carbonate rocks,interbedded fracture zone and fracture zone on the eastern Mengshan rock mass have good potential for the copper polymetallic deposits.