铜陵凤凰山岩体成岩机制探讨  

THE ANALYSIS ON THE ROCK-FORMING MECHANISM OF FENGHUANGSHAN ROCKBODY IN TONGLING AREA

作　　者：邵拥军[1] 彭省临[2] 吴淦国[1] 张达[1] 

机构地区：[1]中国地质大学地球科学与资源学院,北京100083 [2]中南大学地学与环境工程学院,长沙410083

出　　处：《地质与勘探》2003年第5期39-43,共5页Geology and Exploration

基　　金：国家"973"项目(编号:G1999043206);国家"十五"攻关项目(编号:2001BA609A-06-02)资助。

摘　　要：凤凰山岩体是铜陵地区规模最大的成矿岩体,在分析其成岩期次、岩浆来源、构造环境及成岩过程的基础上,结合区域控岩构造和地壳细圈层划分的成果,探讨了其成岩机制,指出凤凰山岩体起源于深部的碱性玄武岩浆,在成岩过程中受到了硅质围岩和钙质围岩两次不同程度的同化混染,成岩属典型的AFC混合机制。Fenghuangshan rockbody is the biggest ore-forming rockbody in the Tongling area. On the basis of the analysis on the rock-forming order, magmatic source, tectonic setting and rock-forming process, combined with achievements of regional rock-control structures and division of crust sublayer, the paper has given a simple analysis on the rock-forming mechanism and pointed out Fenghuangshan rockbody was originated from the deep-seated alkali basalt magma. The rock-forming process has undertaken two different degrees of assimilation and contamination. The rock-forming model belongs to the typical AFC mechanism like assimilation and fractional crystallization.

关 键 词：凤凰山岩体 地壳细圈层 成岩机制 AFC混合机制 成矿岩体 

分 类 号：P588.12[天文地球—岩石学]