Results 121 to 130 of about 406 (161)

Redox reactions in subducted CaCO₃-Fe-SiO₂ as a potential source of superdeep diamond inclusions. [PDF]

Sci Rep
Guo M, Li X, Mao Z, Li F, Li L, Zhou Q.
europepmc   +1 more source

High-pressure chemistry. [PDF]

Commun Chem
Walsh JPS.
europepmc   +1 more source

Trace element partitioning in a deep magma ocean and the origin of the Hf-Nd mantle array. [PDF]

Sci Adv
Ozawa K, Sakamoto N, Tsutsumi Y, Hirose K, Iizuka T, Yurimoto H.   +5 more
europepmc   +1 more source

Pressure Destabilizes Oxygen Vacancies in Bridgmanite [PDF]

Journal of Geophysical Research: Solid Earth, 2021
AbstractBridgmanite may contain a large proportion of ferric iron in its crystal structure in the forms of FeFeO3and MgFeO2.5components. We investigated the pressure dependence of FeFeO3and MgFeO2.5contents in bridgmanite coexisting with MgFe2O4‐phase and with or without ferropericlase in the MgO‐SiO2‐Fe2O3ternary system at 2,300 K, 33 and 40 GPa ...
Catherine McCammon, Tomoo Katsura, Seiji Kamada   +2 more
exaly   +5 more sources

Stability of Fe,Al-bearing bridgmanite in the lower mantle and synthesis of pure Fe-bridgmanite

Science Advances, 2016
A study of Fe,Al-bearing bridgmanite in Earth‘s mantle and synthesis of pure Fe-bridgmanite with anomalously low compressibility.
Hanns-Peter Liermann, Volodymyr Svitlyk, Catherine McCammon   +2 more
exaly   +6 more sources

Bridgmanite is nearly dry at the top of the lower mantle

Earth and Planetary Science Letters, 2021
Abstract Water solubility in the dominant lower-mantle bridgmanite phase remains controversial. Discrepancies between previous results highlight the importance of the growth high-quality single crystals of bridgmanite under high-pressure and high-temperature conditions corresponding to the top of the lower mantle.
Catherine McCammon, Tomoo Katsura, Zhaodong Liu   +2 more
exaly   +3 more sources

Some of the next articles are maybe not open access.

Related searches:

Calcium dissolution in bridgmanite in the Earth’s deep mantle

Nature, 2022
Accurate knowledge of the mineralogy is essential for understanding the lower mantle, which represents more than half of Earth's volume. CaSiO3 perovskite is believed to be the third-most-abundant mineral throughout the lower mantle, following bridgmanite and ferropericlase1-3.
Byeongkwan Ko, Eran Greenberg, Vitali Prakapenka, E. Ercan Alp, Wenli Bi, Yue Meng, Dongzhou Zhang, Sang-Heon Shim   +7 more
openaire   +2 more sources

Increase of the oxygen vacancy component in bridgmanite with temperature

Earth and Planetary Science Letters, 2019
Abstract The oxygen vacancy (OV, MgAlO2.5) contents in bridgmanite with periclase and/or a calcium ferrite-type MgAl2O4–Mg2SiO4 phase (CF-phase) were investigated at temperatures of 1700, 2000, and 2400 K and a pressure of 27 GPa using an ultrahigh-pressure multi-anvil press.
Masaki Akaogi, Tomoo Katsura, Zhaodong Liu   +2 more
exaly   +2 more sources

Texture development and slip systems in bridgmanite and bridgmanite + ferropericlase aggregates

Physics and Chemistry of Minerals, 2016
Bridgmanite (Mg,Fe)SiO3 and ferropericlase (Mg,Fe)O are the most abundant phases in the lower mantle and localized regions of the D″ layer just above the core mantle boundary. Seismic anisotropy is observed near subduction zones at the top of the lower mantle and in the D″ region.
L. Miyagi, H.-R. Wenk
openaire   +1 more source

Ferric iron in bridgmanite and implications for ULVZs

Physics of the Earth and Planetary Interiors, 2020
Abstract The seismic velocities of ferric iron-enriched bridgmanite under core-mantle boundary (CMB) conditions were calculated using GGA + U ab initio molecular dynamics to probe whether ferric iron enriched mantle can explain the properties of ultra-low velocity zones (ULVZ). Under these conditions ferric iron demonstrated some unusual properties.
Joshua M.R. Muir, John P. Brodholt
openaire   +1 more source