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大别山榴辉岩岩石学及地球化学特征
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引用本文:张建珍,杜建国.1998.大别山榴辉岩岩石学及地球化学特征[J].地质论评,44(3):253-263,[DOI]:.
.1998.Petrology and Geochemistry of Ecologite in The Dabie Mountains[J].Geological Review,44(3):253-263.
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张建珍  杜建国
[1]石家庄经济学院 [2]国家地震局分析预报中心
基金项目:国家自然科学基金
中文摘要:本文分析了大别山地区榴辉岩的产出特点,矿物化学、岩石化学及元素地球化学特征。所获资料表明大别山榴辉岩与围岩一起经历了超高压变质作用,但其化学成分特征与围岩存在一定的差异,兼有大陆玄武岩和大洋玄武岩的特征。这些岩石大部分可能为板块俯冲过程中带入的大洋岩石残片。在深部变质形成榴辉岩后又随大别杂岩一起被抬升到地表,在抬升过程中经历了不同程度的退变质作用。
中文关键词:榴辉岩 岩石成因 地球化学 大别山 岩石学
 
Petrology and Geochemistry of Ecologite in The Dabie Mountains
Zhang Jianzhen Du Jianguo
Abstract:This paper analyzes the mode of occurrence and mineral chemical , petrochemical and element geochemical characteristics of eclogite in the Dabie Mountains area. The data show that e- clogite in the study area underwent ultrahigh-pressure metamorphism together with its surrounding rocks , but chemical compositions of eclogite show certain differences from those of the latter. The eclogites show geochemically charcacteristics of both continental and oceanic basalt. Most of the rocks might be originally fragments of oceanic rocks introduced during plate subduction. They were exhumed upto the surface together with the Dabie complex after they were metamorphosed into eclogite at depth. During exhumation eclogite underwent different degrees of retrometamorphism.
keywords:eclogite,gnesis,geochemistry,Dabie Mountains,
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