安徽月山岩体成岩机制  

Rock-forming mechanism of Yueshan intrusion,Tongling, Anhui Province, China

作　　者：刘忠法[1,2] 邵拥军[1,2] 疏志明[3] 张宇[1,2] 

机构地区：[1]中南大学有色金属成矿预测教育部重点实验室,长沙410083 [2]中南大学地球科学与信息物理学院,长沙410083 [3]铜陵有色金属集团控股有限公司,铜陵244000

出　　处：《中国有色金属学报》2012年第3期652-659,共8页The Chinese Journal of Nonferrous Metals

基　　金：国家重点基础研究发展计划资助项目(2007CB411405);国家"十一五"科技支撑计划资助项目(2006BA01B07);国土资源部公益性行业科研专项经费资助项目(200911007-04);国家危机办项目(20109901);中南大学有色金属成矿预测教育部重点实验室发展基金资助项目

摘　　要：从岩石学、岩石化学、稀土元素地球化学和微量元素地球化学特征入手,对形成月山岩体的岩浆来源、成岩环境以及岩浆的成岩作用过程进行分析;在此基础上,对本区月山岩体的成岩机制进行探讨。结果表明:本区岩浆主要来源于上地幔碱性玄武岩浆,成岩环境为岛弧及活动大陆边缘区,岩浆成岩演化过程中受到了上部地壳的同化混染,成岩机制为结晶分异和深部硅铝质同化混染及浅部弱钙质同化混染机制。Abstract： The origin of magma which formed Yueshan intrusion, the metallogenic environment and the diagenesis of magma were investigated based on the analysis of petrology, lithochemistry, trace elements and rare earth elements geochemistry. The diagenetic mechanism was discussed in this area. The results show that the magma rooted in upper mantle alkali basaltic magma, the diagenesis environment is the island arc and active continental margin areas, and the magmas experiences assimilation and contamination of the crustal materials to different degrees during the process of diagenetic evolution. The rock-forming mechanism is crystal fractionation combined with deep salic assimilationary- hybridization and shallow weak calcareous assimilationary-hybridization.

关 键 词：月山岩体 稀土元素 地球化学 成岩机制 结晶分异 同化混染 

分 类 号：P588.12[天文地球—岩石学]