Results 151 to 160 of about 2,719 (188)

Mantle flow and the evolution of the lithosphere

Physics of the Earth and Planetary Interiors, 1993
Abstract The evolution of the lithosphere is mainly controlled by time-dependent forces due to (1) plate tectonic processes and (2) sublithospheric mantle flow. Plate tectonic processes like continental collision may provide strong thermal disturbances and, after completion, may trigger secondary convection beneath the lithosphere.
H. Schmeling, Gabriele Marquart
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The Role of Halogens in the Lithospheric Mantle

2018
The present chapter focuses on the still poorly known sources, distribution and fractionation of halogens in the oceanic and continental lithospheric mantle in intraplate and extensional tectonic settings, and in the deep cratonic sub-continental mantle that hosts diamonds and kimberlites.
Frezzotti, ML, Ferrando, S
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Lithospheric Mantle Deformation beneath the Indian Cratons

The Journal of Geology, 1999
The nature of deformation of the deep continental roots beneath the Archean-Early Proterozoic terrains opens the question whether these ancient terrains have had stable roots since the Precambrian or whether recent plate motions have deformed them. In view of this, we make an attempt to study the thermal structure beneath the cratonic regions of the ...
, Pandey, , Agrawal
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Role of the lithosphere in mantle convection

Journal of Geophysical Research: Solid Earth, 1988
Plate geometry and kinematics generally reflect the mechanical properties of the solid lithosphere rather than those of the fluid mantle underneath, and plate formation and subduction account for most of the heat transport from the Earth's interior. Correspondingly, mantle convection models must incorporate a stiff but mobile boundary layer, like the ...
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A subduction origin for komatiites and cratonic lithospheric mantle

South African Journal of Geology, 2004
We present a model in which the generation of komatiites in Archaean subduction zones produced depleted mantle residues that eventually formed the highly depleted portions of the Kaapvaal lithospheric mantle. The envisioned melting process is similar to that which has formed boninites in Phanerozoic subduction zones such as the Izu-Bonin-Mariana arc ...
Parman, Stephen W, Grove, Timothy L, Dann, Jessc C, De Wit, Maarten J   +3 more
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Moving lithospheric plates and mantle convection

Geophysical Journal International, 1979
Summary. The coupling between a rigidly moving lithospheric plate and a convecting mantle is investigated using a simple two-dimensional numerical model that incorporates a horizontally moving upper boundary, simulating the effect of a moving plate, over a fluid layer heated from below.
R. A. Lux, G. F. Davies, J. H. Thomas
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Origin of the stratification of cratonic mantle lithosphere

Vestnik Otdelenia nauk o Zemle RAN, 2011
Compiled PTX diagram and trans-sects for sub-cratonic mantle lithosphere (SCLM) >of 150 kimberlitic pipes including those from Yakutia. Major regularities were determined for by the comparison of the PTX diagram for the subcratonic lithospheric mantle (SCLM) according to mantle xenoliths from large amount of the kimberlite pipes from N America Yakutia,
I. V. Ashchepkov, D. A. Ionov, T. Ntaflos, H. Downes, P. V. Afanasieva   +4 more
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The influence of mantle metasomatism on the oxidation state of the lithospheric mantle

2009
The oxidation state, reflected in the oxygen fugacity (fO2), of the lithospheric mantle is both laterally and vertically heterogeneous. Depth-fO2 profiles from kimberlite-borne peridotitic mantle xenoliths from the Bultfontein kimberlite, Kimberley, South Africa and the A154-N and A154-S kimberlites of the Diavik Mine, NWT, Canada were constructed by ...
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Continental mantle lithosphere

Chemical Geology, 1988
C.J. Hawkesworth, P.D. Kempton, N.W. Rogers, P. Van Calsteren   +3 more
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CONTINENTAL LITHOSPHERE AND MANTLE PLUMES

Geological Society of America Abstracts with Programs, 2020
Sergei Lebedev, Nicolas Luca Celli, Chiara Civiero   +2 more
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