Continent-sized anomalous zones with low seismic velocity at the base of Earth's mantle

EJ Garnero, AK McNamara, SH Shim - Nature Geoscience, 2016 - nature.com
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 …

A review of large low shear velocity provinces and ultra low velocity zones

AK McNamara - Tectonophysics, 2019 - Elsevier
Seismic tomography reveals 2 extensive regions in the lowermost mantle, beneath Africa
and the Pacific, that exhibit lower-than-average seismic wave speeds. These regions have …

Moon-forming impactor as a source of Earth's basal mantle anomalies

Q Yuan, M Li, SJ Desch, B Ko, H Deng, EJ Garnero… - Nature, 2023 - nature.com
Seismic images of Earth's interior have revealed two continent-sized anomalies with low
seismic velocities, known as the large low-velocity provinces (LLVPs), in the lowermost …

Reconciling dynamic and seismic models of Earth's lower mantle: The dominant role of thermal heterogeneity

DR Davies, S Goes, JH Davies, BSA Schuberth… - Earth and Planetary …, 2012 - Elsevier
Two large low-shear-velocity provinces (LLSVPs) in the deep mantle beneath Africa and the
Pacific are generally interpreted as hot but chemically dense 'piles', which have remained …

Simulating the thermochemical magmatic and tectonic evolution of Venus's mantle and lithosphere: Two‐dimensional models

M Armann, PJ Tackley - Journal of Geophysical Research …, 2012 - Wiley Online Library
Numerical convection models of the thermochemical evolution of Venus are compared to
present‐day topography and geoid and recent resurfacing history. The models include …

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) …

Ubiquitous ultra-depleted domains in Earth's mantle

A Stracke, F Genske, J Berndt, JM Koornneef - Nature Geoscience, 2019 - nature.com
Partial melting of Earth's mantle generates oceanic crust and leaves behind a chemically
depleted residual mantle. The time-integrated composition of this chemically depleted …

Plutonic‐squishy lid: A new global tectonic regime generated by intrusive magmatism on Earth‐like planets

DL Lourenço, AB Rozel, MD Ballmer… - Geochemistry …, 2020 - Wiley Online Library
The thermal and chemical evolution of rocky planets is controlled by their surface tectonics
and magmatic processes. On Earth, magmatism is dominated by plutonism/intrusion versus …

[HTML][HTML] Outgassing on stagnant-lid super-Earths

C Dorn, L Noack, AB Rozel - Astronomy & Astrophysics, 2018 - aanda.org
Aims. We explore volcanic CO 2-outgassing on purely rocky, stagnant-lid exoplanets of
different interior structures, compositions, thermal states, and age. We focus on planets in …

Dynamics and evolution of the deep mantle resulting from thermal, chemical, phase and melting effects

PJ Tackley - Earth-Science Reviews, 2012 - Elsevier
The core–mantle boundary (CMB)–the interface between the silicate mantle and liquid iron
alloy outer core–is the most important boundary inside our planet, with processes occurring …