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Hydrolytic weakening of jadeite in UHP jadeite-quartzites from the Dabie Mountains, eastern China

Published online by Cambridge University Press:  05 July 2018

Wen Su ,
Kai Ye  and
Jingbo Liu
Wen Su*
Affiliation:
Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
Kai Ye
Affiliation:
Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
Jingbo Liu
Affiliation:
Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
*
*E-mail: [email protected]
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Abstract

Deformed jadeite grains in the UHP jadeite-quartzites from the Dabie Mountains, eastern China show evidence (by transmission electron microscopy, TEM) of plastic deformation: free dislocations, dislocation loops, dislocation networks, dislocation arrays and regularly spaced subgrain boundaries by dislocation walls. Electron energy-loss spectroscopy and TEM studies reveal the existence of water-rich bubbles within dislocations and imply a relationship with water-defect dislocation by water weakening in the jadeites. These observations suggest that the water-rich bubbles are a major weakening effect facilitating plastic deformation of jadeite by dislocation creep.

Keywords

water-rich bubbleswater weakeningdeformation mechanismnatural jadeiteDabie MountainsChinaTEMEELS
Type
Research Article
Information
Mineralogical Magazine , Volume 70 , Issue 5 , October 2006 , pp. 509 - 515
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2006

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