中国地质2012，Vol.39Issue(1)：156-169,14.
西藏甲玛铜多金属矿床岩浆混合作用及对成矿的贡献
The role of magma mingling in mineralization of the Jiama copperpolymetallic deposit in Tibet
摘要
Abstract
Lots of evidence shows that magma mingling existed in the Jiama ore deposit. It is of great geological significance to study the magma mingling. Based on tectonic and magmaic theory, this paper has established tectonic and magmaic evolutionary sequence of the Jiama ore deposit in the Gandise metallogenic belt according to structural association features and genesis of the granitoids. It is held that underplating was the direct power in the process of magma mingling, the original mechanism of mixed magma might have been the pre-mingling and emplacement that occurred at 15 Ma 40% basic end-member (mafic magma) and 60% acid end-member (granodioritic gneiss) , and the re-mingling of magma happened again along with mechanical mixture. The metal elements and S in ore-forming fluid came from mantle-derived mafic magma, inmplying that the mingling of magma contributed to mineralization.关键词
镁铁质暗色包体/岩浆混合作用/混合作用机制/成矿的贡献Key words
mafic enclaves/ mingling of magma/ mingling mechanism/ contribution to mineralization分类
天文与地球科学引用本文复制引用
苟正彬,汪雄武,彭慧娟,周云,秦志鹏,张强,雷传扬..西藏甲玛铜多金属矿床岩浆混合作用及对成矿的贡献[J].中国地质,2012,39(1):156-169,14.基金项目
国家973项目(2011CB403103)和中央公益性行业科研专项(200911007-02)联合资助. （2011CB403103）
