Advances in Earth Science ›› 1995, Vol. 10 ›› Issue (2): 148-153. doi: 10.11867/j.issn.1001-8166.1995.02.0148

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FRONTIER OF METAMORPHIC GEOLOGY—ULTRAHIGH-PRESSURE METAMORPHISM AND GEODYNAMICS

Liu Xiaochun,Qu Wei   

  1. Institute of Geochemistry, Academia Sinica,Guiyang  550002
  • Received:1994-04-05 Revised:1994-07-04 Online:1995-04-01 Published:1995-04-01

Liu Xiaochun,Qu Wei. FRONTIER OF METAMORPHIC GEOLOGY—ULTRAHIGH-PRESSURE METAMORPHISM AND GEODYNAMICS[J]. Advances in Earth Science, 1995, 10(2): 148-153.

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.

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