Mantle plumes and their role in Earth processes
The existence of mantle plumes was first proposed in the 1970s to explain intra-plate,
hotspot volcanism, yet owing to difficulties in resolving mantle upwellings with geophysical …
hotspot volcanism, yet owing to difficulties in resolving mantle upwellings with geophysical …
Continent-sized anomalous zones with low seismic velocity at the base of Earth's mantle
Seismic images of Earth's interior reveal two massive anomalous zones at the base of the
mantle, above the core, where seismic waves travel slowly. The mantle materials that …
mantle, above the core, where seismic waves travel slowly. The mantle materials that …
Deep mantle structure as a reference frame for movements in and on the Earth
TH Torsvik, R van der Voo… - Proceedings of the …, 2014 - National Acad Sciences
Earth's residual geoid is dominated by a degree-2 mode, with elevated regions above large
low shear-wave velocity provinces on the core–mantle boundary beneath Africa and the …
low shear-wave velocity provinces on the core–mantle boundary beneath Africa and the …
Persistence of strong silica-enriched domains in the Earth's lower mantle
The composition of the lower mantle—comprising 56% of Earth's volume—remains poorly
constrained. Among the major elements, Mg/Si ratios ranging from∼ 0.9–1.1, such as in …
constrained. Among the major elements, Mg/Si ratios ranging from∼ 0.9–1.1, such as in …
[HTML][HTML] Density structure of Earth's lowermost mantle from Stoneley mode splitting observations
Advances in our understanding of Earth's thermal evolution and the style of mantle
convection rely on robust seismological constraints on lateral variations of density. The large …
convection rely on robust seismological constraints on lateral variations of density. The large …
Compositional mantle layering revealed by slab stagnation at~ 1000-km depth
Improved constraints on lower-mantle composition are fundamental to understand the
accretion, differentiation, and thermochemical evolution of our planet. Cosmochemical …
accretion, differentiation, and thermochemical evolution of our planet. Cosmochemical …
Chemical complexity of hotspots caused by cycling oceanic crust through mantle reservoirs
Lavas erupted at ocean island hotspots such as Hawaii have diverse geochemical
signatures. These ocean island basalts are thought to be derived from many sources with …
signatures. These ocean island basalts are thought to be derived from many sources with …
[HTML][HTML] Core formation, mantle differentiation and core-mantle interaction within Earth and the terrestrial planets
RG Trønnes, MA Baron, KR Eigenmann, MG Guren… - Tectonophysics, 2019 - Elsevier
The terrestrial planets accreted from a diverse suite of solar system materials ranging from
strongly O-deficient materials similar to enstatite chondrites via ordinary chondrite materials …
strongly O-deficient materials similar to enstatite chondrites via ordinary chondrite materials …
Deflating the LLSVPs: bundles of mantle thermochemical plumes rather than thick stagnant “piles”
A Davaille, B Romanowicz - Tectonics, 2020 - Wiley Online Library
Based on SEMUCB‐WM1 tomographic model, validated by other recent models, and fluid
mechanics constraints, we show that the large low shear velocity provinces (LLSVPs) …
mechanics constraints, we show that the large low shear velocity provinces (LLSVPs) …
[HTML][HTML] Melt–crystal density crossover in a deep magma ocean
The crystallization of a magma ocean (MO) early in Earth's history shaped the entire
evolution of our planet. The buoyancy relations between the forming crystals and the …
evolution of our planet. The buoyancy relations between the forming crystals and the …