摘要
竹鸡顶铜矿位于著名的多金属成矿带西南三江成矿带北带,义敦岛弧有色、贵金属矿产地集中区南部。成矿岩体地球化学特征表现为Rb、Th和U富集,而Ba、Nb、Sr、P、Ti明显亏损,岩体为轻稀土富集型,呈现中等Eu异常。根据矿床的化学成分特征,成矿构造环境的研究,认为竹鸡顶为滞后火山弧的环境下受到碰撞造山伸展降温过程中的岩浆-构造活动影响形成的铜矿,扬子西缘的俯冲作用为富铜的幔源流体进入中下地壳提供了条件。
Zhujiding porphyry copper deposit is located in the north part of the ＂Three- river＂ metallogenic belt, and in the south part of non- ferrous and precious metal concentration region of Yidun island arc. Geochemistry of mineralizing bodies show that Rb, Th and U are enrich and Ba, Nb, Sr, P and Ti are obviously deficit. Light rare earth elements are riched with medium Eu anomaly. Based on ore chemical compositions and mineralizing tectonic setting, it is suggested that Zhujiding porphyry copper deposit is formed in the magma - tectonic environment of collision orogenic extension cooling process. Subduction of the western Yangzi platform offers factor for the mantle Cu - rich fluid went into the middle and upper Crust.
出处
《地质与勘探》
CAS
CSCD
北大核心
2008年第1期42-45,共4页
Geology and Exploration
基金
中国地质调查局项目(编号:200310200018)资助
关键词
铜矿床
义敦岛弧
矿床成因
copper deposit, Yidun island arc, ore genesis
