云南香格里拉春都斑岩体岩石地球化学特征研究  

A Study on Petrological Geochemistry Features of Chundu Porphyry Body, Xianggelila,Yunnan Province,Chian

作　　者：吴静[1] 李峰[1] 姜永果[1] 邹国富 赵向东 杨帆[1] 李建飞 郭嵋 

机构地区：[1]昆明理工大学国土资源工程学院,云南昆明650093 [2]中国有色金属工业昆明勘察设计研究院,云南昆明650051

出　　处：《矿物学报》2011年第3期550-559,共10页Acta Mineralogica Sinica

基　　金：校企横向合作项目(编号:619320090071);矿床地球化学国家重点实验室开放基金项目(编号:201007)

摘　　要：春都矿区复式斑岩体主要由闪长玢岩岩株及侵入其中的花岗闪长斑岩岩枝组成,后者为斑岩铜矿的成矿母岩。岩石地球化学特征表明,春都侵入岩属于钙碱性系列,Cs、Rb、K、Ba、Sr等大离子亲石元素(LIL)在岩石中明显富集,Y、Hf、Zr、Ti、Nb、Ta等较不活泼的高场强元素(HFS)则在岩石中相对亏损。通过构造环境图解判别,斑岩体形成于主动大陆边缘的火山弧构造环境,是甘孜-理塘洋壳向西俯冲的产物。The Chundu complex porphyry body consists of diorite porphyrite stock and granodiorite porphyry dike. The latter is the minerogenic mother rock of porphyry copper deposits. According to the geochemical feature, such LIL el- ements including Cs, Rb, K, Ba and Sr are apparently concentrated, while opposite for those inactive HFS elements including Y, I-If, Zr, Ti, Nb and Ta. It indicates that magma originated from upper mantle or lower crust with crust substance involved in. With the help of tectonic background, porphyry rocks formed in volcanic arc structural environ- ment of active continental margin, which can be regarded as the outcome of westward subduction of oceanic crust a- long Ganzi-Litang trench.

关 键 词：春都斑岩体 岩石地球化学特征 香格里拉 

分 类 号：P581[天文地球—岩石学] P584[天文地球—地质学]