Calcium Solubility of Bridgmanite in Subducted Basalt in Earth's Lower Mantle
Geophysical Research LettersThe calcium solubility in bridgmanite and the resulting abundance of davemaoite under lower‐mantle pressure‐temperature conditions have been under debate following a recent report of extensive calcium dissolution in bridgmanite.
Chengwei Zhang +7 more
doaj +2 more sources
Melting and density of MgSiO3 determined by shock compression of bridgmanite to 1254GPa [PDF]
Nature Communications, 2021 The authors here report high melting temperatures of MgSiO3 at 500 GPa by direct shockwave loading of pre-synthesized dense bridgemanite. This is essential data to understand the thermal evolution of the interiors of terrestrial (exo-)planets.
Yingwei Fei +7 more
doaj +3 more sources
High‐Pressure Transformations and Stability of Ferromagnesite in the Earth's Mantle
Geophysical Monograph Series, Page 105-113., 2020 This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.
Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions
Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
Eglantine Boulard +2 more
wiley +5 more sources
Corrigendum: NanoSIMS analysis of water content in bridgmanite at the micron scale: an experimental approach to probe water in Earth’s deep mantle [PDF]
Frontiers in Chemistry, 2023 Ya-Nan Yang +13 more
doaj +2 more sources
Extensive iron–water exchange at Earth’s core–mantle boundary can explain seismic anomalies [PDF]
Nature CommunicationsSeismological observations indicate the presence of chemical heterogeneities at the lowermost mantle, just above the core–mantle boundary (CMB), sparking debate over their origins.
Katsutoshi Kawano +5 more
doaj +2 more sources
Kinetics and detectability of the bridgmanite to post-perovskite transformation in the Earth's D″ layer [PDF]
Nature Communications, 2019 The D$${}^{{\prime\prime} }$$ ″ layer in the Earth’s lower mantle involves a seismic discontinuity which is often assigned to a mineral phase transition to post-perovskite, however, as this phase transition occurs over broad region the assignment of ...
Christopher Langrand +6 more
doaj +11 more sources
Evidence for the charge disproportionation of iron in extraterrestrial bridgmanite [PDF]
Science Advances, 2020 We find that the charge disproportionation reaction of ferrous iron occurs in a natural high-pressure environment.
Luca Bindi +3 more
openaire +3 more sources
Depressed 660-km discontinuity caused by akimotoite–bridgmanite transition [PDF]
Nature, 2022 AbstractThe 660-kilometre seismic discontinuity is the boundary between the Earth’s lower mantle and transition zone and is commonly interpreted as being due to the dissociation of ringwoodite to bridgmanite plus ferropericlase (post-spinel transition)1–3. A distinct feature of the 660-kilometre discontinuity is its depression to 750 kilometres beneath
Artem Chanyshev +15 more
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Effect of grain size on amorphization mechanism and kinetics of bridgmanite in shocked meteorites
Progress in Earth and Planetary Science, 2023 Bridgmanite formation and amorphization in shocked meteorites constrain the pressure and temperature conditions during planetary impact. However, the effect of the bridgmanite grain size on its amorphization kinetics is still unclear.
Masayuki Nishi +8 more
doaj +1 more source
Thermoelasticity of Fe2+‐bearing bridgmanite [PDF]
Geophysical Research Letters, 2015 AbstractWe present local density approximation augmented by the Hubbard‐type correction calculations of high‐temperature elastic properties of bridgmanite with composition for 0≤×≤0.125. Results of elastic moduli and acoustic velocities for the Mg end‐member (x=0) agree very well with the latest high‐pressure and high‐temperature experimental ...
Shukla G. +5 more
openaire +5 more sources