Results 21 to 30 of about 3,205,657 (173)
Shear-induced material transfer across the core-mantle boundary aided by the post-perovskite phase transition [PDF]
, 2005 We present a novel mechanical model for the extraction of outer core material upwards across the CMB into the mantle side region of D" and subsequent interaction with the post-perovskite (ppv) phase transition.
Brodholt, John +4 more
core +11 more sources
Deep mantle anomalies block early Earth melting, challenging a primordial origin [PDF]
Scientific ReportsEarth’s deep mantle hosts enigmatic structures known as Large Low Velocity Provinces (LLVPs), which sit atop the core–mantle boundary and influence mantle dynamics and plume generation.
Arnab Roy +2 more
doaj +2 more sources
Geomagnetic Impulses and the Electrical Conductivity of the Lower Mantle [PDF]
, 1991 This thesis is an investigation of the changes in the magnetic field as measured at the surface of the Earth on the time-scale of months to decades. In particular the phenomena of geomagnetic "impulses" or "jerks" are investigated.
Stewart, Douglas Norman
core +9 more sources
Multidisciplinary Constraints on the Thermal‐Chemical Boundary Between Earth's Core and Mantle
Geochemistry, Geophysics, Geosystems, 2022 Heat flux from the core to the mantle provides driving energy for mantle convection thus powering plate tectonics, and contributes a significant fraction of the geothermal heat budget.
Daniel A. Frost +9 more
doaj +1 more source
Frontiers in Earth Science, 2021 There is a considerable amount of literature on the electrical resistivity of iron at Earth’s core conditions, while only few studies have considered iron and iron-alloys at other planetary core conditions.
Meryem Berrada, Richard A. Secco
doaj +1 more source
Viscomagnetic torque at the core mantle boundary [PDF]
Geophysical Journal International, 2006 A magneto-hydrodynamic model of boundary layers at the Core-Mantle Boundary (CMB) is derived and used to compute the viscous and electromagnetic torques generated by the Earth's nutation forcing. The predicted electromagnetic torque alone cannot account for the dissipation estimated from the observations of the free core nutation.
Deleplace, Bérangère, Cardin, Philippe
openaire +5 more sources
Observations of core‐mantle boundary Stoneley modes [PDF]
Geophysical Research Letters, 2013 AbstractCore‐mantle boundary (CMB) Stoneley modes represent a unique class of normal modes with extremely strong sensitivity to wave speed and density variations in the D” region. We measure splitting functions of eight CMB Stoneley modes using modal spectra from 93 events with Mw> 7.4 between 1976 and 2011.
Koelemeijer, P, Deuss, A, Ritsema, J
openaire +2 more sources
Carbon Storage in Earth's Deep Interior Implied by Carbonate‐Silicate‐Iron Melt Miscibility
Geochemistry, Geophysics, Geosystems, 2023 Carbonate melts have been proposed to exist in the lower mantle, but their interaction with other lower mantle melt compositions is poorly understood. To understand miscibility in the carbonate‐silicate‐metal melt system, we simulate endmember, binary ...
A. H. Davis +3 more
doaj +1 more source
The root to the Galápagos mantle plume on the core-mantle boundary
Seismica, 2022 Ultra-low velocity zones (ULVZs) are thin anomalous patches on the boundary between the Earth's core and mantle, revealed by their effects on the seismic waves that propagate through them. Here we map a broad ULVZ near the Galápagos hotspot using shear-
Sanne Cottaar +3 more
doaj +1 more source
Geophysical Research Letters, 2023 Geodynamic modeling and seismic studies have highlighted the possibility that a thin layer of low seismic velocities, potentially molten, may sit atop the core‐mantle boundary but has thus far eluded detection.
Stuart Russell +3 more
doaj +1 more source