摘要
本文对陈蔡群变质岩中的斜长用闪岩进行了地球化学研究。常量元素、微量元素和稀土元素的特征表明陈蔡群变质岩中存在两种不同成因的斜长角闪岩，其一是正角闪岩，由拉斑玄武质岩石变质形成；其二是副变质成因的角闪岩，其原岩为白云质泥灰岩。进一步的地球化学研究，揭示出正斜长角闪岩的成岩构造环境类似于大陆边缘环境。
In this paper,the amphibolites in Chencai group metamorphic rocks have been studied by means of geochemistry. The characteristics of trace element and rare earth element of the am phibolites indicate that there are two kinds of amphibolites which have different genesis. One is orthoamphibolite, formed by metamorphism of tholeiite, another is para-amphibolite and its original rock is dolomitic marlite. A further geochemical study shows the orthoamphibolite was formed in a tectonic setting close to continental margin.
出处
《浙江国土资源》
1994年第1期30-37,共8页
Zhejiang Land & Resources
关键词
陈蔡群
斜长角闪岩
成因
Chencai group, amphibolite, genesis
