Ab initio crystal structure and elasticity of tuite, γ-Ca3(PO4)2, with implications for trace element partitioning in the lower mantle
Sign Up to like & getrecommendations! Published in 2017 at "Contributions to Mineralogy and Petrology"
DOI: 10.1007/s00410-017-1406-5
Abstract: Tuite forms by the breakdown of apatite at high pressure and is thus expected to play a role in extending the phosphorus cycle beyond the stability field of apatite and into the lower mantle. With… read more here.
Keywords: lower mantle; elasticity tuite; trace element; structure elasticity ... See more keywords
The effect of iron and aluminum incorporation on lattice thermal conductivity of bridgmanite at the Earth's lower mantle
Sign Up to like & getrecommendations! Published in 2017 at "Earth and Planetary Science Letters"
DOI: 10.1016/j.epsl.2017.06.022
Abstract: Abstract Bridgmanite (Bdg), iron (Fe)- and aluminum (Al)-bearing magnesium silicate perovskite is the most abundant mineral in the Earth's lower mantle. Thus, its thermal conductivity governs the lower mantle thermal conductivity that critically controls the… read more here.
Keywords: lattice thermal; thermal conductivity; conductivity; lower mantle ... See more keywords
Carbonate stability in the reduced lower mantle
Sign Up to like & getrecommendations! Published in 2018 at "Earth and Planetary Science Letters"
DOI: 10.1016/j.epsl.2018.02.035
Abstract: Abstract Carbonate minerals are important hosts of carbon in the crust and mantle with a key role in the transport and storage of carbon in Earth's deep interior over the history of the planet. Whether… read more here.
Keywords: lower mantle; mantle; carbonate stability; stability reduced ... See more keywords
Linked influences on slab stagnation: Interplay between lower mantle viscosity structure, phase transitions, and plate coupling
Sign Up to like & getrecommendations! Published in 2019 at "Earth and Planetary Science Letters"
DOI: 10.1016/j.epsl.2018.12.027
Abstract: Abstract An endothermic phase transition in mantle material at 660-km depth constitutes a barrier that in most cases prevents the direct penetration of subducted slabs. Seismic tomography shows that subducted material is in many subduction… read more here.
Keywords: stagnation; lower mantle; depth; viscosity ... See more keywords
The fate of carbonate in oceanic crust subducted into earth's lower mantle
Sign Up to like & getrecommendations! Published in 2019 at "Earth and Planetary Science Letters"
DOI: 10.1016/j.epsl.2019.01.041
Abstract: Abstract We report on laser-heated diamond anvil cell (LHDAC) experiments in the FeO–MgO–SiO2–CO2 (FMSC) and CaO–MgO–SiO2–CO2 (CMSC) systems at lower mantle pressures designed to test for decarbonation and diamond forming reactions. Sub-solidus phase relations based… read more here.
Keywords: mantle; lower mantle; oceanic crust; carbonate ... See more keywords
Strong correlation of oxygen vacancies in bridgmanite with Mg/Si ratio
Sign Up to like & getrecommendations! Published in 2019 at "Earth and Planetary Science Letters"
DOI: 10.1016/j.epsl.2019.06.037
Abstract: Abstract The variation of an oxygen vacancy (OV) in the form of an MgAlO2.5 component in bridgmanite with Mg/Si ratios of bulk compositions was clarified using phase relations in the ternary system MgO–AlO1.5–SiO2 at a… read more here.
Keywords: component; lower mantle; ratio; correlation oxygen ... See more keywords
Grain boundary diffusion of W in lower mantle phase with implications for isotopic heterogeneity in oceanic island basalts by core-mantle interactions
Sign Up to like & getrecommendations! Published in 2020 at "Earth and Planetary Science Letters"
DOI: 10.1016/j.epsl.2019.115887
Abstract: Tungsten isotopes provide important constraints on the ocean-island basalt (OIB) source regions. Recent analyses of μ182W in modern basalts with high 3He/4He originating from the core-mantle boundary region reveal two distinct features: positive μ182W in… read more here.
Keywords: lower mantle; boundary diffusion; grain boundary; core mantle ... See more keywords
Blocked radiative heat transport in the hot pyrolitic lower mantle
Sign Up to like & getrecommendations! Published in 2020 at "Earth and Planetary Science Letters"
DOI: 10.1016/j.epsl.2020.116176
Abstract: Abstract The heat flux across the core-mantle boundary ( Q CMB ) is the key parameter to understand the Earth's thermal history and evolution. Mineralogical constraints of the Q CMB require deciphering contributions of the… read more here.
Keywords: heat transport; mantle; cmb; radiative heat ... See more keywords
Fe-periclase reactivity at Earth's lower mantle conditions: Ab-initio geochemical modelling
Sign Up to like & getrecommendations! Published in 2017 at "Geochimica et Cosmochimica Acta"
DOI: 10.1016/j.gca.2017.07.030
Abstract: Abstract Intrinsic and extrinsic stability of the (Mg,Fe)O solid mixture in the Fe-Mg-Si-O system at high P , T conditions relevant to the Earth’s mantle is investigated by the combination of quantum mechanical calculations (Hartree-… read more here.
Keywords: periclase; iron; reactivity; earth ... See more keywords
High-pressure phase transitions of anorthosite crust in the Earth's deep mantle
Sign Up to like & getrecommendations! Published in 2018 at "Geoscience Frontiers"
DOI: 10.1016/j.gsf.2017.10.002
Abstract: Abstract We investigated phase relations, mineral chemistry, and density of lunar highland anorthosite at conditions up to 125 GPa and 2000 K. We used a multi-anvil apparatus and a laser-heated diamond-anvil cell for this purpose. In-situ X-ray… read more here.
Keywords: phase; mantle; deep mantle; anorthosite crust ... See more keywords
The Mg-carbonate–Fe interaction: Implication for the fate of subducted carbonates and formation of diamond in the lower mantle
Sign Up to like & getrecommendations! Published in 2019 at "Geoscience Frontiers"
DOI: 10.1016/j.gsf.2018.10.003
Abstract: Abstract The fate of subducted carbonates in the lower mantle and at the core-mantle boundary was modelled via experiments in the MgCO3-Fe0 system at 70–150 GPa and 800–2600 K in a laser-heated diamond anvil cell. Using in… read more here.
Keywords: lower mantle; interaction; fate subducted; subducted carbonates ... See more keywords