Continent-sized anomalous zones with low seismic velocity at the base of Earth's mantle
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 …
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 …
and the Pacific, that exhibit lower-than-average seismic wave speeds. These regions have …
[HTML][HTML] Stagnant lids and mantle overturns: Implications for Archaean tectonics, magmagenesis, crustal growth, mantle evolution, and the start of plate tectonics
JH Bédard - Geoscience Frontiers, 2018 - Elsevier
The lower plate is the dominant agent in modern convergent margins characterized by
active subduction, as negatively buoyant oceanic lithosphere sinks into the asthenosphere …
active subduction, as negatively buoyant oceanic lithosphere sinks into the asthenosphere …
FeO2 and FeOOH under deep lower-mantle conditions and Earth's oxygen–hydrogen cycles
The distribution, accumulation and circulation of oxygen and hydrogen in Earth's interior
dictate the geochemical evolution of the hydrosphere, atmosphere and biosphere. The …
dictate the geochemical evolution of the hydrosphere, atmosphere and biosphere. The …
Moon-forming impactor as a source of Earth's basal mantle anomalies
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 …
seismic velocities, known as the large low-velocity provinces (LLVPs), in the lowermost …
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 …
Evidence for a liquid silicate layer atop the Martian core
Seismic recordings made during the InSight mission suggested that Mars's liquid core would
need to be approximately 27% lighter than pure liquid iron,, implying a considerable …
need to be approximately 27% lighter than pure liquid iron,, implying a considerable …
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 …
Internal structure of ultralow-velocity zones consistent with origin from a basal magma ocean
Seismological observations reveal patches of low-velocity anomalies at the core–mantle
boundary known as ultralow-velocity zones. Despite recent advances, their origin and …
boundary known as ultralow-velocity zones. Despite recent advances, their origin and …
Compositional mantle layering revealed by slab stagnation at~ 1000-km depth
Improved constraints on lower-mantle composition are fundamental to understand the
accretion, differentiation, and thermochemical evolution of our planet. Cosmochemical …
accretion, differentiation, and thermochemical evolution of our planet. Cosmochemical …