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Metamorphism Characteristics of Songduo Group in Menba Township Mozhugongka County, Tibet and the Discussion on Its Age

YANG De-ming, HE Zhong-hua, HUANG Ying-cong, ZHAO Liang, DAI Lin-na   

  1. College of Earth Sciences, Jilin University, Changchun 130061, China
  • Received:2004-10-11 Revised:1900-01-01 Online:2005-07-26 Published:2005-07-26
  • Contact: YANG De-ming

Abstract: Songduo Group in Mozhugongka County, Tibet had undergone deformation and metamorphism for three times. The main metamorphism (500~553℃, 0.93~1.15 GPa) belongs to middlelow temperature and middlehigh pressure dynamothermal metamorphism, and is similar to the metamorphism formed in a plate collision zone. Isotope ages indicate that the Songduo Group is the product of metamorphism in Caledonian. The appearance Sm-Nd age(1 516 Ma) of actinote schist may imply the original rocks of Songduo Group formed in middle proterozoic era.

Key words: metamorphism characteristics, metamorphic period, Songduo Group, Tibet

CLC Number: 

  • P588.3
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