Results 41 to 50 of about 3,317 (237)

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

Intraplate Seamounts as a Window into Deep Earth Processes [PDF]

Oceanography, 2010
Seamounts are windows into the deep Earth that are helping to elucidate various deep Earth processes. For example, thermal and mechanical properties of oceanic lithosphere can be deter-mined from the flexing of oceanic crust caused by the growth of ...
Anthony A.P. Koppers, Anthony B. Watts
doaj  

The Probability of Mantle Plumes in Global Tomographic Models

Geochemistry, Geophysics, Geosystems, 2020
While the downward mass flux in the Earth's deep interior is well constrained by seismic tomography, the upward flux is still poorly understood and debated.
Augustin Marignier, Ana M. G. Ferreira, Thomas Kitching   +2 more
doaj   +1 more source

How the Indian Ocean Geoid Low Was Formed

Geophysical Research Letters, 2023
The origin of the Earth's lowest geoid, the Indian Ocean geoid low (IOGL) has been controversial. The geoid predicted from present‐day tomography models has shown that mid to upper mantle hot anomalies are integral in generating the IOGL.
Debanjan Pal, Attreyee Ghosh
doaj   +1 more source

Deformation-Induced Mechanical Instabilities at the Core-Mantle Boundary

, 2007
Post-Perovskite: The Last Mantle Phase Transition Our understanding of the core-mantle boundary (CMB) region has improved significantly over the past several years due, in part, to the discovery of the post-perovskite phase.
Petford, Nick; id_orcid, Yuen, David A., David A. Yuen, Tracy Rushmer, Petford, Nick, Yuen, D.A., Rushmer, Tracy, Nick Petford   +7 more
core   +1 more source

Melt volume at Atlantic volcanic rifted margins controlled by depth-dependent extension and mantle temperature

Nature Communications, 2021
Magmatic productivity at passive margins is controlled by mantle temperature and rifting style. The authors reveal that melt volume at rifted margins is linearly correlated with margin width and that volcanic margins may result from depth dependent ...
Gang Lu, Ritske S. Huismans
doaj   +1 more source

Noble Gases in Mantle Plumes

Science, 2001
Trieloff et al . ([1][1]) provided neon isotope data to argue that mantle neon originates as a trapped component in meteorites rather than having a pristine solar composition. That finding, if true, has important consequences for understanding the mechanism of volatile input into the mantle ...
Ballentine, C, Porcelli, D, Wieler, R
openaire   +3 more sources

Plume tectonics – myth or reality?

Записки Горного института, 2017
The paper is dedicated to the role of mantle plumes in the formation of large igneous provinces. From different regions of the world facts are mentioned that contradict key points of plume tectonics.
Yu. I. Daragan-Sushchov
doaj   +1 more source

Geochemical Constraints on the Structure of the Earth's Deep Mantle and the Origin of the LLSVPs

Geochemistry, Geophysics, Geosystems, 2021
Geophysical analysis of the Earth's lower mantle has revealed the presence of two superstructures characterized by low shear wave velocities on the core‐mantle boundary.
Matthew Gleeson, Caroline Soderman, Simon Matthews, Sanne Cottaar, Sally Gibson   +4 more
doaj   +1 more source

Evidence From Microscopy and U–Pb Geochronology as a Clue to the Influence of the Cretaceous Magmatism in the Diagenesis of Pre‐Salt Carbonate Reservoirs in the Santos Basin (Brazil)

Geological Journal, EarlyView.
Carbonates from Santos Basin revealed U–Pb ages correlated with basalt ages (A), suggesting that they were formed during magmatic events. These events placed hot CO2 in the reservoir, which, when mixed with carbonate‐rich cold water (B), led to thermal convection, enabling the formation of the U contained in the carbonates.
Marco António Ruivo de Castro e Brito, Cristiano Leite Sombra, Davy Raeder Brandão, Cleverson Guizan Silva, Sidney Luiz de Matos Mello, Eugênio Vaz dos Santos Neto, Rui Jorge Fernandes Baptista, Ramsés Capilla, Luiz Antônio Pierantoni Gambôa   +8 more
wiley   +1 more source