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 …
Slab stagnation in the shallow lower mantle linked to an increase in mantle viscosity
H Marquardt, L Miyagi - Nature Geoscience, 2015 - nature.com
Subduction of oceanic lithosphere is the main process by which material from Earth's
surface and atmosphere is recycled back into the deep mantle. Seismic images indicate that …
surface and atmosphere is recycled back into the deep mantle. Seismic images indicate that …
On the consistency of seismically imaged lower mantle slabs
The geoscience community is increasingly utilizing seismic tomography to interpret mantle
heterogeneity and its links to past tectonic and geodynamic processes. To assess the …
heterogeneity and its links to past tectonic and geodynamic processes. To assess the …
Solving or resolving global tomographic models with spherical wavelets, and the scale and sparsity of seismic heterogeneity
We propose a class of spherical wavelet bases for the analysis of geophysical models and
for the tomographic inversion of global seismic data. Its multiresolution character allows for …
for the tomographic inversion of global seismic data. Its multiresolution character allows for …
Seismological expression of the iron spin crossover in ferropericlase in the Earth's lower mantle
The two most abundant minerals in the Earth's lower mantle are bridgmanite and
ferropericlase. The bulk modulus of ferropericlase (Fp) softens as iron d-electrons transition …
ferropericlase. The bulk modulus of ferropericlase (Fp) softens as iron d-electrons transition …
The fate of the slabs interacting with a density/viscosity hill in the mid-mantle
In the last two decades it has been proposed several times that a non-monotonic profile
might fit the average lower mantle radial viscosity. Most proposed profiles consist in a more …
might fit the average lower mantle radial viscosity. Most proposed profiles consist in a more …
Discriminating lower mantle composition
Constraining Earth's bulk composition is fundamental to understanding our planet's
formation and evolution. While the lower mantle accounts for a majority of the bulk silicate …
formation and evolution. While the lower mantle accounts for a majority of the bulk silicate …
Discovery of the Middle Mantle Transition Zone (MMTZ) and Its Geodynamic Significance
Y Wang - 2023 - uknowledge.uky.edu
Global mantle discontinuities and mantle transition zones are crucial to the earth's evolution.
By employing K-Means clustering, which belongs to cluster analysis in machine learning …
By employing K-Means clustering, which belongs to cluster analysis in machine learning …
Bullen's parameter as a seismic observable for spin crossovers in the lower mantle
JJ Valencia‐Cardona, Q Williams… - Geophysical …, 2017 - Wiley Online Library
Elastic anomalies produced by the spin crossover in ferropericlase have been documented
by both first‐principles calculations and high pressure‐temperature experiments. The …
by both first‐principles calculations and high pressure‐temperature experiments. The …
A Computational Study of the Earth's Lower Mantle Thermal Structure and Composition
J Valencia-Cardona - 2018 - conservancy.umn.edu
An enhanced determination of the internal dynamic processes that take place in our planet's
interior could be achieved if its composition and thermal structure are well resolved …
interior could be achieved if its composition and thermal structure are well resolved …