Open AccessAsthenosphere dynamics based on the H2O dependence of element diffusivity in olivine
Author(s) -
Tomoo Katsura,
Hongzhan Fei
Publication year - 2020
Publication title -
national science review
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.433
H-Index - 54
eISSN - 2095-5138
pISSN - 2053-714X
DOI - 10.1093/nsr/nwaa278
Subject(s) - asthenosphere , olivine , thermal diffusivity , geology , dynamics (music) , geochemistry , thermodynamics , physics , seismology , subduction , acoustics , tectonics
The oceanic asthenosphere shows two enigmatic features: low viscosity and high electrical conductivity. Their origins gather wide attention, but remain unsolved. Recent self-diffusivity measurements as a function of H 2 O content in olivine demonstrated that the H2O-incorporation in olivine cannot soften the asthenosphere, but it enhances the ionic conductivity, and causes the high-conductivity anomaly.
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