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Elastic properties of orthoenstatite and its high‐pressure phase and implications for the origin of low V p /V s zones and the X discontinuity
Author(s) -
Qian Wangsheng,
Wang Wengzhong,
Zou Fan,
Wu Zhongqing
Publication year - 2019
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/1755-6724.13986
Subject(s) - discontinuity (linguistics) , phase (matter) , materials science , high pressure , thermodynamics , geology , mineralogy , chemistry , physics , mathematics , mathematical analysis , organic chemistry
The composition of the Earth’s interior is critical in understanding the origin and evolution of the Earth and its geodynamics. Orthopyroxene (opx) is an important component for the upper mantle both in the pyrolite model and in the piclogite model. Opx will transform to the high-pressure phase (HPCEN). The transformation has been related to the X discontinuity. Furthermore, much evidence suggests the local enrichment of opx in the upper mantle. Therefore, the elastic properties are fundamental for an understanding of chemical compositions and dynamics of the upper mantle.