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
Core-mantle boundary topography and its relation to the viscosity structure of the lowermost mantle
Sign Up to like & getrecommendations! Published in 2020 at "Earth and Planetary Science Letters"
DOI: 10.1016/j.epsl.2020.116358
Abstract: Abstract Two large areas of anomalously low seismic velocities are visible in all tomographic models of the lowermost mantle. Depending on the density structure of these Large Low Shear Velocity Provinces (LLSVPs), the core-mantle boundary… read more here.
Keywords: topography; viscosity; viscosity structure; lowermost mantle ... See more keywords
Immiscible silicate liquids and phosphoran olivine in Netschaëvo IIE silicate: Analogue for planetesimal core–mantle boundaries
Sign Up to like & getrecommendations! Published in 2017 at "Geochimica et Cosmochimica Acta"
DOI: 10.1016/j.gca.2016.10.042
Abstract: Abstract We have investigated a piece of the Netschaevo IIE iron meteorite containing a silicate inclusion by means of electron microprobe analysis (EMPA) and transmission electron microscopy (TEM). Netschaevo contains chondrule-bearing clasts and impact melt… read more here.
Keywords: silicate; phosphoran olivine; inclusion; core mantle ... See more keywords
Earth’s volatile accretion as told by Cd, Bi, Sb and Tl core–mantle distribution
Sign Up to like & getrecommendations! Published in 2021 at "Geochimica et Cosmochimica Acta"
DOI: 10.1016/j.gca.2021.02.017
Abstract: Abstract The timing and origin of volatile elements accretion on Earth has been and continues to be key questions, despite intense research scrutiny. Two end-member scenarios are usually proposed in which (1) volatile elements were… read more here.
Keywords: earth; accretion; core mantle; core ... See more keywords
Regional stratification at the top of Earth's core due to core–mantle boundary heat flux variations
Sign Up to like & getrecommendations! Published in 2019 at "Nature Geoscience"
DOI: 10.1038/s41561-019-0381-z
Abstract: Earth’s magnetic field is generated by turbulent motion in its fluid outer core. Although the bulk of the outer core is vigorously convecting and well mixed, some seismic, geomagnetic and geodynamic evidence suggests that a… read more here.
Keywords: stratification; mantle boundary; core mantle; heat flux ... See more keywords
Long-term core-mantle interaction explains W-He isotope heterogeneities.
Sign Up to like & getrecommendations! Published in 2023 at "Proceedings of the National Academy of Sciences of the United States of America"
DOI: 10.1073/pnas.2215903120
Abstract: The isotopic characteristics of ocean island basalts have long been used to infer the nature of their source and the long-term evolution of the Earth's mantle. Anticorrelation between tungsten and helium isotopic signatures is a… read more here.
Keywords: long term; core; core mantle; isotopic ... See more keywords