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 …
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 …
and the Pacific, that exhibit lower-than-average seismic wave speeds. These regions have …
Broad plumes rooted at the base of the Earth's mantle beneath major hotspots
SW French, B Romanowicz - Nature, 2015 - nature.com
Plumes of hot upwelling rock rooted in the deep mantle have been proposed as a possible
origin of hotspot volcanoes, but this idea is the subject of vigorous debate,. On the basis of …
origin of hotspot volcanoes, but this idea is the subject of vigorous debate,. On the basis of …
Globally distributed subducted materials along the Earth's core-mantle boundary: Implications for ultralow velocity zones
Ultralow velocity zones (ULVZs) are the most anomalous structures within the Earth's
interior; however, given the wide range of associated characteristics (thickness and …
interior; however, given the wide range of associated characteristics (thickness and …
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 …
Ultralow velocity zone and deep mantle flow beneath the Himalayas linked to subducted slab
The origins of ultralow velocity zones, small-scale structures with extremely low seismic
velocities found near the core–mantle boundary, remain poorly understood. One hypothesis …
velocities found near the core–mantle boundary, remain poorly understood. One hypothesis …
Tungsten-182 heterogeneity in modern ocean island basalts
New tungsten isotope data for modern ocean island basalts (OIB) from Hawaii, Samoa, and
Iceland reveal variable 182W/184W, ranging from that of the ambient upper mantle to ratios …
Iceland reveal variable 182W/184W, ranging from that of the ambient upper mantle to ratios …
Anomalous 182W in high 3He/4He ocean island basalts: fingerprints of Earth's core?
Abstract The short-lived 182 Hf-182 W isotope system (t 1/2= 9 Ma) left evidence in both
ancient and modern terrestrial rock record of processes that took place during the earliest …
ancient and modern terrestrial rock record of processes that took place during the earliest …
[HTML][HTML] Kilometer-scale structure on the core–mantle boundary near Hawaii
The lowermost mantle right above the core-mantle boundary is highly heterogeneous
containing multiple poorly understood seismic features. The smallest but most extreme …
containing multiple poorly understood seismic features. The smallest but most extreme …
Ultralow velocity zone locations: A global assessment
S Yu, EJ Garnero - Geochemistry, Geophysics, Geosystems, 2018 - Wiley Online Library
We have compiled all previous ultralow velocity zone (ULVZ) studies, and digitized their
core‐mantle boundary (CMB) sampling locations. For studies that presented sampling …
core‐mantle boundary (CMB) sampling locations. For studies that presented sampling …