Seismic evidence for Earth's crusty deep mantle
Sign Up to like & getrecommendations! Published in 2017 at "Earth and Planetary Science Letters"
DOI: 10.1016/j.epsl.2017.04.036
Abstract: Abstract Seismic tomography resolves anomalies interpreted as oceanic lithosphere subducted deep into Earth's lower mantle. However, the fate of the compositionally distinct oceanic crust that is part of the lithosphere is poorly constrained but provides… read more here.
Keywords: mantle; deep mantle; heterogeneity; deep earth ... See more keywords
Absolute plate motions relative to deep mantle plumes
Sign Up to like & getrecommendations! Published in 2018 at "Earth and Planetary Science Letters"
DOI: 10.1016/j.epsl.2018.03.021
Abstract: Abstract Advances in whole waveform seismic tomography have revealed the presence of broad mantle plumes rooted at the base of the Earth's mantle beneath major hotspots. Hotspot tracks associated with these deep mantle plumes provide… read more here.
Keywords: absolute plate; mantle plumes; deep mantle; plate motions ... 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
Fate of Hydrous Fe‐Rich Silicate Melt in Earth's Deep Mantle
Sign Up to like & getrecommendations! Published in 2019 at "Geophysical Research Letters"
DOI: 10.1029/2019gl083633
Abstract: Density of silicate melt dictates melt migration and establishes the gross structure of Earth's interior. However, due to technical challenges, the melt density of relevant compositions is poorly known at deep mantle conditions. Particularly, water… read more here.
Keywords: silicate; fate hydrous; silicate melt; deep mantle ... See more keywords
Seismic detection of a deep mantle discontinuity within Mars by InSight
Sign Up to like & getrecommendations! Published in 2022 at "Proceedings of the National Academy of Sciences of the United States of America"
DOI: 10.1073/pnas.2204474119
Abstract: Significance The depth and sharpness of a midmantle seismic discontinuity, associated with the phase transition from mineral olivine to its higher-pressure polymorphs, provide essential clues to understanding the temperature and composition of Martian mantle. Using… read more here.
Keywords: detection deep; seismic detection; discontinuity; deep mantle ... See more keywords
Global mantle flow retrodictions for the early Cenozoic using an adjoint method: evolving dynamic topographies, deep mantle structures, flow trajectories and sublithospheric stresses
Sign Up to like & getrecommendations! Published in 2021 at "Geophysical Journal International"
DOI: 10.1093/gji/ggab108
Abstract: During the Cenozoic, the Earth experienced multiple first-order geological events that are likely mantle flow related. These include the termination of large-scale marine inundation in North America in the Palaeocene, the late Tertiary rise of… read more here.
Keywords: global mantle; mantle; mantle flow; flow retrodictions ... See more keywords
Imaging deep-mantle plumbing beneath La Réunion and Comores hot spots: Vertical plume conduits and horizontal ponding zones
Sign Up to like & getrecommendations! Published in 2023 at "Science Advances"
DOI: 10.1126/sciadv.ade3723
Abstract: Whether the two large low–shear velocity provinces (LLSVPs) at the base of Earth’s mantle are wide compact structures extending thousands of kilometers upward or bundles of distinct mantle plumes is the subject of debate. Full… read more here.
Keywords: beneath; hot spots; beneath union; deep mantle ... See more keywords