变质地质学新领域——超高压变质作用与地球动力学

doi:10.11867/j.issn.1001-8166.1995.02.0148

地球科学进展 ›› 1995, Vol. 10 ›› Issue (2): 148 -153. doi: 10.11867/j.issn.1001-8166.1995.02.0148

刘晓春,曲玮

中国科学院地球化学研究所贵阳 550002

收稿日期:1994-04-05 修回日期:1994-07-04 出版日期:1995-04-01
通讯作者: 刘晓春
基金资助:
国家自然科学基金项目“中国中东部变质柯石英带的岩石学和矿物物理学及地质意义”(编号：49070099)资助.

FRONTIER OF METAMORPHIC GEOLOGY—ULTRAHIGH-PRESSURE METAMORPHISM AND GEODYNAMICS

Liu Xiaochun,Qu Wei

Institute of Geochemistry, Academia Sinica,Guiyang 550002

Received:1994-04-05 Revised:1994-07-04 Online:1995-04-01 Published:1995-04-01

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简要总结了近年在欧亚大陆发现的超高压变质岩地质产状、岩石类型、结晶条件和构造位置等基本特征，对超高压变质作用及其地球动力学机制的研究现状及存在的问题进行了评述。基于对大别—苏鲁超高压变质带的研究成果，认为超高压变质作用可能是一种新型的区域变质作用，而目前所建立的任何一种地球动力学模型都不完善。建议今后在岩石学和矿物学研究基础上，加强对超高压变质杂岩的地球化学、构造地质学、实验岩石学及地球物理学等方面的研究。

关键词: 超高压变质岩, 超高压变质作用, 地球动力学

The general features of ultrahigh-pressure metamorphic rocks discovered recently from Eurasian continent, including occurrence,rock type,crystalline condition and tectonic location,are summarized briefly and the progresses and problems of ultrahigh-pressure metamorphism and geodynamics are reviewed in this paper. According to the characteristics of protolith of eclogites,the discovery of the different types of non-mafic ultrahigh-pressure metamorphic rocks and the correlation of both P-T condition and age between retrograde metamorphism of eclogites and regional metamorphism of country rocks in the Dabie-Sulu district, ultrahigh-pressure metamorphism is considered to be a new type of regional metamorphism. The sequence of high-pressure metamorphic belt in the Dabie Mountains and the occurrence of coesite-bearing granulite retrograded from eclogite in eastern Shangdong suggest that the satisfactory geodynamic model for ultrahigh-pressure metamorphism has not been established up to now. On the basis of petrological and mineralogical works, the authors emphasize that geochemical,tectonic,experimental petrological and geophysical studies of ultrahigh-pressure metamorphic complex should be strengthened in the future.

Key words: Ultrahigh-pressure metamorphic rock, Ultrahigh-pressure metamorphism, Geodynamics.

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