Compositional heterogeneity in the mantle transition zone
Earth's mantle transition zone (MTZ) is characterized by several sharp increases in seismic
wave speed between~ 300 km and~ 850 km depth. These seismic discontinuities are …
wave speed between~ 300 km and~ 850 km depth. These seismic discontinuities are …
The cycling of subducted oceanic crust in the Earth's deep mantle
M Li - Mantle convection and surface expressions, 2021 - Wiley Online Library
The oceanic crust is created at mid‐ocean ridges and returned to the Earth's deep mantle at
subduction zones. A clear picture on the dynamics and distribution of the subducted oceanic …
subduction zones. A clear picture on the dynamics and distribution of the subducted oceanic …
A poorly mixed mantle transition zone and its thermal state inferred from seismic waves
The abrupt changes in mineralogical properties across the Earth's mantle transition zone
substantially impact convection and thermochemical fluxes between the upper and lower …
substantially impact convection and thermochemical fluxes between the upper and lower …
Seismic velocities of CaSiO3 perovskite can explain LLSVPs in Earth's lower mantle
Seismology records the presence of various heterogeneities throughout the lower mantle,,
but the origins of these signals—whether thermal or chemical—remain uncertain, and …
but the origins of these signals—whether thermal or chemical—remain uncertain, and …
Variation in bridgmanite grain size accounts for the mid-mantle viscosity jump
A viscosity jump of one to two orders of magnitude in the lower mantle of Earth at 800–1,200-
km depth is inferred from geoid inversions and slab-subducting speeds. This jump is known …
km depth is inferred from geoid inversions and slab-subducting speeds. This jump is known …
The evolution and distribution of recycled oceanic crust in the Earth's mantle: Insight from geodynamic models
A better understanding of the Earth's compositional structure is needed to place the
geochemical record of surface rocks into the context of Earth accretion and evolution …
geochemical record of surface rocks into the context of Earth accretion and evolution …
Oceanic plateau of the Hawaiian mantle plume head subducted to the uppermost lower mantle
The Hawaiian-Emperor seamount chain that includes the Hawaiian volcanoes was created
by the Hawaiian mantle plume. Although the mantle plume hypothesis predicts an oceanic …
by the Hawaiian mantle plume. Although the mantle plume hypothesis predicts an oceanic …
Seismic evidence for a 1000 km mantle discontinuity under the Pacific
Seismic discontinuities in the mantle are indicators of its thermo-chemical state and offer
clues to its dynamics. Ray-based seismic methods, though limited by the approximations …
clues to its dynamics. Ray-based seismic methods, though limited by the approximations …
[HTML][HTML] Coupled dynamics and evolution of primordial and recycled heterogeneity in Earth's lower mantle
The nature of compositional heterogeneity in Earth's lower mantle remains a long-standing
puzzle that can inform about the long-term thermochemical evolution and dynamics of our …
puzzle that can inform about the long-term thermochemical evolution and dynamics of our …
Constraints on seismic anisotropy in the mantle transition zone from long‐period SS precursors
The mantle transition zone (MTZ) of Earth is demarcated by solid‐to‐solid phase changes of
the mineral olivine that produce seismic discontinuities at 410 and 660‐km depths. Mineral …
the mineral olivine that produce seismic discontinuities at 410 and 660‐km depths. Mineral …