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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。
This paper analyzes the characteristics of eclogite output, mineral chemistry, petrochemistry and elemental geochemistry in the Dabie Mountains. The obtained data indicate that the Eclogites in the Dabie Mountains experienced the UHP metamorphism together with the surrounding rock. However, their chemical compositions are different from those of the surrounding rock. They are characterized by both continental basalt and oceanic basalts. Most of these rocks may be oceanic rock fragments brought in during plate subduction. After the deep metamorphism formed eclogite, it was lifted to the surface along with the Dabie complex and underwent different degrees of retrogressive metamorphism during the uplift.