安徽月山岩体岩石地球化学特征及成因  

PETRO-GEOCHEMICAL CHARACTERISTICS AND GENESIS OF YUESHAN INTRUSION,ANHUI PROVINCE

作　　者：杨光树[1] 温汉捷[1] 胡瑞忠[1] 于文修[2] 樊海峰[1] 

机构地区：[1]中国科学院地球化学研究所矿床地球化学国家重点实验室,贵阳550002 [2]中国科学院研究生院,北京100039

出　　处：《矿物学报》2007年第3期406-413,共8页Acta Mineralogica Sinica

基　　金：国家重点基础研究项目(2007CB411402);中国科学院知识创新工程项目(KZCX2-102)

摘　　要：月山矿田是长江中、下游地区典型的夕卡岩-热液脉型铁、铜、金多金属矿田。月山岩体与金属矿床成因密切相关。通过对月山岩体系统的岩石学、岩石化学和微量元素地球化学特征研究,认为月山岩体是在区域拉张环境下,由亏损地幔低程度部分熔融形成的硅酸不饱和高钾碱性玄武岩浆经AFC机制形成的。The Yueshan ore field is a typical skarn-hydrothermal-type Fe, Cu（Au） polymetallic ore field in the middle-lower reaches of the Changjiang （Yangtze） River. The Yueshan intrusion has close genetic relationship with the ore deposits. Systematic studies on petrology, petrochemistry and trace element geochemistry of the intrusion were carried out, and the results showed that the Yueshan intrusion was formed by a combined process of wall-rock assimilation of crustal material and fractional crystallization of Si-unsaturated high-K alkaline basalt, which was derived from low-degree partial melting of the depleted mantle. The diagenetic environment of the intrusion is a regionally extensional one.

关 键 词：安徽 月山岩体 岩石化学 微量元素 

分 类 号：P581[天文地球—岩石学] P588.1[天文地球—地质学]