Results 81 to 90 of about 3,205,657 (173)

High thermal conductivity of the Earth's core and geodynamo

Vestnik MGTU
The geomagnetic field is generated by dynamo processes in the Earth's core. This process is supported by the cooling of the planet and the growth of the solid core. It is known that the magnetic field existed long before the appearance of the solid core,
Reshetnyak M. Yu.
doaj   +1 more source

Subduction‐Related Volcanic Activity as a Proxy for Global Subduction Flux Over the Past Billion Years, and Its Correlation With Geomagnetic Superchrons

Geophysical Research Letters
We investigate the frequency of subduction‐related volcanic events over the past billion years. Our analysis reveals distinct peaks and troughs interpreted as significant fluctuations in global subduction flux.
Jean Besse, Yves Gallet
doaj   +1 more source

Turbulence in Earth’s core generates large topographic torques on the mantle

Communications Earth & Environment
e Seismic and geodynamic studies indicate that the boundary between the Earth’s liquid outer core and solid mantle is not spherical, but is likely characterized by topography in the form of inverted mountains and valleys that have typical amplitudes of ...
Tobias G. Oliver, Eric G. Blackman, John A. Tarduno, Michael A. Calkins   +3 more
doaj   +1 more source

How P‐Wave Scattering Throughout the Entire Mantle Mimics the High‐Frequency Pdiff and Its Coda

Geophysical Research Letters
We document the arrival of seismic energy in the core shadow zone up to large distances beyond 150° more than 100 s prior to the core phases. Numerical simulations of the energy transport in an established heterogeneity model show that scattering ...
Tuo Zhang, Christoph Sens‐Schönfelder, Marcelo Bianchi, Klaus Bataille   +3 more
doaj   +1 more source

Teleseismic Array Studies of Earth’s Core-Mantle Boundary

, 2011
Bibliography: p.
openaire   +2 more sources

A model for the geomagnetic field reversal rate and constraints on the heat flux variations at the core-mantle boundary. [PDF]

Sci Rep, 2020
Carbone V, Alberti T, Lepreti F, Vecchio A.   +3 more
europepmc   +1 more source

The earth’s core: an approach from first principles [PDF]

, 2004
The Earth’s core is largely composed of iron (Fe), alloyed with less dense elements such as sulphur, silicon and/or oxygen. The phase relations and physical properties of both solid and liquid Fe-alloys are therefore of great geophysical importance. As
Gillan, M.J., Vočadlo, L., L. Vočadlo, M. J. Gillan, G. David Price, G. D. Price, D. Alfè, Price, G.D., Alfè, D.   +8 more
core  

On the core-mantle thermal and chemical coupling: Review and perspectives

, 2019
Introduction: On the core-mantle thermal and chemical coupling in terms of the long-term evolution of Earth’s mantle and core, there are mainly two approaches for explaining the magnetic evolution provided from paleomagnetic data [1] and heat budget ...
Nakagawa, T
core  

Anisotropic diffusion creep in postperovskite provides a new model for deformation at the core-mantle boundary. [PDF]

Proc Natl Acad Sci U S A, 2019
Dobson DP, Lindsay-Scott A, Hunt SA, Bailey E, Wood IG, Brodholt JP, Vocadlo L, Wheeler J.   +7 more
europepmc   +1 more source

Absence of dehydration due to superionic transition at Earth's core-mantle boundary. [PDF]

Sci Adv
He Y, Zhang W, Hu Q, Sun S, Hu J, Liu D, Zhou L, Dai L, Kim DY, Redfern SAT, Liu Y, Li H, Mao HK.   +12 more
europepmc   +1 more source