桂北猫儿山加里东期不同期次花岗岩与锡多金属成矿关系

Relationship between tow stages of Caledonian granites and tin polymetallic mineralization in Maoershan,Northern Guangxi

桂北猫儿山花岗岩体位于南岭成矿带的西段,是华南地区著名的有色金属成矿带重要组成部分。本次主要通过岩石学、地球化学分析,结合前人研究成果,对其成矿关系进行了探讨。研究表明猫儿山早、晚两期加里东期花岗岩主量元素及微量元素特征,均呈现出逐步向生成锡矿方向发展的趋势;稀土元素表现出其早期岩体主要成锡、钨、镍、钍矿,晚期岩体主要以成锡、稀土矿为主。因此,认为猫儿山加里东期花岗岩与锡、钨、镍及稀土矿等成矿作用可能有密切关系,尤其晚期岩体与锡、稀土矿成矿作用较为密切。

Maoershan granite body is located in the western section of Nanling metallogenic belt,which is an important part of the famous non-ferrous metal metallogenic belt in South China.Through petrological and geochemical analysis,combined with previous research results,the metallogenic relationship was discussed.The results show that the characteristics of the major elements and trace elements of the early and late Caledonian granite in Maoershan show a trend towards the formation of tin ore gradually.Rare earth elements show that the early rock mass is mainly formed tin,tungsten,nickel and thorium,while the late rock mass is mainly formed tin and rare earth.Therefore,it is believed that the Caledonian granite in Maoershan may be closely related to the mineralization of tin,tungsten,nickel and rare earth minerals,especially the late rock mass is closely related to the mineralization of tin and rare earth minerals.