Morphology of seismically slow lower-mantle structures
Large low shear velocity provinces (LLSVPs), whose origin and dynamic implication remain
enigmatic, dominate the lowermost mantle. For decades, seismologists have created …
enigmatic, dominate the lowermost mantle. For decades, seismologists have created …
Shear and compressional velocity models of the mantle from cluster analysis of long-period waveforms
We present a new technique for the efficient measurement of the traveltimes of long period
body wave phases. The technique is based on the fact that all arrivals of a particular seismic …
body wave phases. The technique is based on the fact that all arrivals of a particular seismic …
Cluster analysis of global lower mantle tomography: A new class of structure and implications for chemical heterogeneity
Earth's lower mantle is dominated by a pair of antipodal large low shear velocity provinces
(LLSVPs) that reach> 1000km up from the core–mantle boundary (CMB). These are …
(LLSVPs) that reach> 1000km up from the core–mantle boundary (CMB). These are …
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) …
Subducted oceanic crust as the origin of seismically slow lower-mantle structures
Mantle tomography reveals the existence of two large low-shear-velocity provinces
(LLSVPs) at the base of the mantle. We examine here the hypothesis that they are piles of …
(LLSVPs) at the base of the mantle. We examine here the hypothesis that they are piles of …
Compositional layering within the large low shear‐wave velocity provinces in the lower mantle
MD Ballmer, L Schumacher, V Lekic… - Geochemistry …, 2016 - Wiley Online Library
The large low shear‐wave velocity provinces (LLSVP) are thermochemical anomalies in the
deep Earth's mantle, thousands of km wide and∼ 1800 km high. This study explores the …
deep Earth's mantle, thousands of km wide and∼ 1800 km high. This study explores the …
[HTML][HTML] The P-wave boundary of the large-low shear velocity province beneath the Pacific
Abstract The Large Low Shear Velocity Provinces (LLSVPs) in the lower mantle represent
volumetrically significant thermal or chemical or thermo-chemical heterogeneities. Their …
volumetrically significant thermal or chemical or thermo-chemical heterogeneities. Their …
Reconciling dynamic and seismic models of Earth's lower mantle: The dominant role of thermal heterogeneity
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 …
Pacific are generally interpreted as hot but chemically dense 'piles', which have remained …
Thermally dominated deep mantle LLSVPs: a review
The two large low shear-wave velocity provinces (LLSVPs) that dominate lower-mantle
structure may hold key information on Earth's thermal and chemical evolution. It is generally …
structure may hold key information on Earth's thermal and chemical evolution. It is generally …
Global mantle structure from multifrequency tomography using P, PP and P-diffracted waves
In global-scale seismic tomography, teleseismic P and PP waves mainly constrain structures
in the upper two thirds of the mantle, whereas core-diffracted waves (Pdiff) constrain the …
in the upper two thirds of the mantle, whereas core-diffracted waves (Pdiff) constrain the …