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Could tectonic overpressure cause ultrahigh-pressure metamorphism?

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Chinese Science Bulletin

Abstract

Could ultrahigh-pressure metamorphic rocks be caused, at depth of 32 km, by tectonic overpressure resulting from differential stress? The differential stress is limited by rock strength, which depends on strain rate and temperature. Therefore, tectonic overpressure could not go beyond 1 GPa, and could not cause the uitrahigh-pressure metamorphism. The stress-strain in plastic deformation, or in plastic stage of elasto-plastic deformation, has no linear relation, and should not be described by using linear equation of elastic deformation.

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Authors and Affiliations

  1. Institute of Gedom, Chinese Academy of Sciences, 100029, Beijing, China

    Qingchen Wang, Jingbo Liu & Bolin Cong

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  1. Qingchen Wang
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  2. Jingbo Liu
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  3. Bolin Cong
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Wang, Q., Liu, J. & Cong, B. Could tectonic overpressure cause ultrahigh-pressure metamorphism?. Chin.Sci.Bull. 44, 2295–2298 (1999). https://doi.org/10.1007/BF02885943

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  • DOI: https://doi.org/10.1007/BF02885943

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