TY - JOUR
T1 - In situ X-ray observation of decomposition of superhydrous phase B at high pressure and temperature
AU - Ohtani, Eiji
AU - Toma, Motomasa
AU - Kubo, Tomoaki
AU - Kondo, Tadashi
AU - Kikegawa, Takumi
PY - 2003/1/15
Y1 - 2003/1/15
N2 - High pressure and high temperature in situ X-ray diffraction experiments on the stability of superhydrous phase B have been conducted to clarify the host of water in the slabs descending into the lower mantle. We observed the decomposition reaction of superhydrous phase B into phase G (= phase D and F), periclase, and MgSiO3 perovskite at around 700 ∼1100°C and above 30 GPa, and the boundary of the decomposition reaction can be expressed as P(GPa) = -0.0037(±0.0017)T(°C) + 32.2(±0.5). This reaction can occur in slabs descending into the uppermost part of the lower mantle.
AB - High pressure and high temperature in situ X-ray diffraction experiments on the stability of superhydrous phase B have been conducted to clarify the host of water in the slabs descending into the lower mantle. We observed the decomposition reaction of superhydrous phase B into phase G (= phase D and F), periclase, and MgSiO3 perovskite at around 700 ∼1100°C and above 30 GPa, and the boundary of the decomposition reaction can be expressed as P(GPa) = -0.0037(±0.0017)T(°C) + 32.2(±0.5). This reaction can occur in slabs descending into the uppermost part of the lower mantle.
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U2 - 10.1029/2002GL015549
DO - 10.1029/2002GL015549
M3 - Article
AN - SCOPUS:0037591205
VL - 30
SP - 1-1 - 1-4
JO - Geophysical Research Letters
JF - Geophysical Research Letters
SN - 0094-8276
IS - 2
ER -