Results 61 to 70 of about 3,205,657 (173)

Influence of Grain Size Evolution on Mantle Plume and LLSVP Dynamics

Geochemistry, Geophysics, Geosystems
Recent seismic tomography models suggest large‐radius primary plumes originating from the core‐mantle boundary, with grain size variations potentially explaining these observations. Additionally, grain size variations are thought to enhance the long‐term
Yusen Liu, Ting Yang, Kai Wang, Xiong Wang, Yang Li   +4 more
doaj   +1 more source

On seismic-wave scattering by a rough core?mantle boundary [PDF]

Geophysical Journal International, 1978
Summary. A formulation is given for the seismic-wave scattering by a rough solid-liquid interface, in analogy to results derived for a solid-solid interface and a heterogeneous volume. Using Kennett’s approach and the reciprocity theorem, the scattering is formulated as the excitation by an equivalent dislocation. Using interface parameters relevant to
openaire   +2 more sources

Carbon-driven Chemical Interactions between Alumina and Iron: A possible reaction pathway in Earth's interior [PDF]

, 2008
Seismological and geochemical observations have revealed a complex structure for the earth's core-mantle boundary (CMB) region, with lateral and chemical heterogeneities.
Rita Khanna, Mohammad Ikram-ul Haq, Veena Sahajwalla   +2 more
core  

Sr-Nd-Pb-Hf isotope results from ODP Leg 187: Evidence for mantle dynamics of the Australian-Antarctic Discordance and origin of the Indian MORB source [PDF]

, 2002
New high precision PIMMS Hf and Pb isotope data for 14–28 Ma basalts recovered during ODP Leg 187 are compared with zero-age dredge samples from the Australian-Antarctic Discordance (AAD).
Barry, Tiffany Louise, Langmuir, C., Christie, D. M., David M. Christie, Barry, T. L., Pearce, J. A., Pamela D. Kempton, Pearce, Julian A., J. Godfrey Fitton, Tiffany L. Barry, Charles Langmuir, Langmuir, Charles, Julian A. Pearce, Kempton, Pamela D., Fitton, J. G., Kempton, P. D., Fitton, J. Godfrey, Christie, David M.   +17 more
core   +1 more source

Patchy Weather at the Core-Mantle Boundary

, 2020
I decided to simplify the title of our new paper (Muir & Tkalčić), significantly, for the purposes of presenting it to a general audience.
openaire   +1 more source

The lithosphere-asthenosphere boundary in the North-West Atlantic region [PDF]

, 2005
A detailed knowledge of the thickness of the lithosphere in the north Atlantic is an important parameter for understanding plate tectonics in that region.
Schweitzer, J., Reigber, C., Woelbern, I., Schwintzer, P., Wylegalla, K., Wolf, D., Larsen, T., Priestley, K., Fleming, K., Larsen, T. B., Kind, R., Hanka, W., Dahl-Jensen, T., Kumar, P., Yuan, X., Fleming, Kevin, Gudmundsson, O.   +16 more
core   +1 more source

Atlas of the underworld: Slab remnants in the mantle, their sinking history, and a new outlook on lower mantle viscosity [PDF]

, 2018
Across the entire mantle we interpret 94 positive seismic wave-speed anomalies as subducted lithosphere and associate these slabs with their geological record.
Mantle dynamics & theoretical geophysics, Spakman, Wim, van der Meer, Douwe G., van Hinsbergen, Douwe J.J.   +3 more
core   +1 more source

FeO Content of Earth’s Liquid Core

Physical Review X, 2019
The standard model of Earth’s core evolution has the bulk composition set at formation, with slow cooling beneath a solid mantle providing power for geomagnetic field generation.
Monica Pozzo, Chris Davies, David Gubbins, Dario Alfè   +3 more
doaj   +1 more source

A generating process of geomagnetic drifting field

Earth, Planets and Space, 2018
The geomagnetic field is comprised of drifting and standing fields. The drifting field has two remarkable features. One is predominance of sectorial harmonics when the field is expressed in a spherical harmonic series, and the other is uniform drift rate
Takesi Yukutake, Hisayoshi Shimizu
doaj   +1 more source

Copper isotope evidence for large-scale sulphide fractionation during Earth’s differentiation [PDF]

, 2015
The differentiation of Earth into a metallic core and silicate mantle left its signature on the chemical and isotopic composition of the bulk silicate Earth (BSE).
Savage, P.S., Siebert, J., Badro, J., Moynier, F., Puchtel, I.S., Chen, H., Savage, Paul S., Shofner, G.   +7 more
core   +1 more source