On the relative temperatures of Earth's volcanic hotspots and mid-ocean ridges

X Bao, CR Lithgow-Bertelloni, MG Jackson… - Science, 2022 - science.org
Volcanic hotspots are thought to be fed by hot, active upwellings from the deep mantle, with
excess temperatures (T ex)~ 100° to 300° C higher than those of mid-ocean ridges …

Insights into the origins and compositions of mantle plumes: A comparison of Galápagos and Hawai'i

KS Harpp, D Weis - Geochemistry, Geophysics, Geosystems, 2020 - Wiley Online Library
The Galápagos and Hawai'i archipelagos are formed by mantle plumes originating at the
large low shear velocity province (LLSVP) boundary. We report new high‐precision Pb, Sr …

The morphology, evolution and seismic visibility of partial melt at the core–mantle boundary: implications for ULVZs

J Dannberg, R Myhill, R Gassmöller… - Geophysical Journal …, 2021 - academic.oup.com
Seismic observations indicate that the lowermost mantle above the core–mantle boundary
(CMB) is strongly heterogeneous. Body waves reveal a variety of ultra-low velocity zones …

A compositional component to the Samoa ultralow‐velocity zone revealed through 2‐and 3‐D waveform modeling of SKS and SKKS differential travel‐times and …

J Krier, MS Thorne, K Leng… - Journal of Geophysical …, 2021 - Wiley Online Library
We analyzed 4,754 broadband seismic recordings of the SKS, SKKS, and SPdKS wavefield
from 13 high quality events sampling the Samoa ultralow‐velocity zone (ULVZ). We …

Dynamics in Earth's Mantle: Constraints from Planetary Scale to Nanoscale

Q Yuan - 2022 - search.proquest.com
Subsolidus convection in the mantle of Earth is the driving mechanism behind plate
tectonics and provides a central framework linking geophysical, geochemical, petrological …

[PDF][PDF] New techniques for the robust detection and quantification of seismic anisotropy in the lowermost mantle

J Asplet - 2021 - research-information.bris.ac.uk
The lowermost mantle—D—is a crucial thermochemical boundary layer within the Earth,
exerting control over dynamic processes in both the overlying mantle and the core below …