Results 31 to 40 of about 16,936 (226)
Komatiites From Mantle Transition Zone Plumes
Frontiers in Earth Science, 2020 During the Archean, episodic volcanism commonly included both plume- and arc-type magmatism, raising the issue of a possible link between “bottom up” and “top down” geodynamic processes.
Derek Wyman
doaj +1 more source
Bifurcations and dynamics in convection with temperature-dependent viscosity in the presence of the O(2) symmetry [PDF]
, 2013 We focus the study of a convection problem in a 2D setup in the presence of the O(2) symmetry. The viscosity in the fluid depends on the temperature as it changes its value abruptly in an interval around a temperature of transition.
Curbelo, Jezabel, Mancho, Ana M.
core +4 more sources
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 +2 more
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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
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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
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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
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Symmetry and plate-like convection in fluids with temperature-dependent viscosity [PDF]
, 2014 We explore the instabilities developed in a fluid in which viscosity depends on temperature. In particular, we consider a dependency that models a very viscous (and thus rather rigid) lithosphere over a convecting mantle.
Curbelo, Jezabel, Mancho, Ana M.
core +1 more source
Mantle Plumes and Their Interactions
, 2022 Hotspots are regions of intraplate volcanism or especially strong volcanism along plateboundaries, and many of them are likely caused by underlying mantle plumes – localizedhot upwellings from deep inside the Earth. It is still uncertain, whether all plumes or justsome of them rise from the lowermost mantle, and to what extent and where theyentrain ...
Steinberger, B., Steinberger, A.
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Are mantle plumes adiabatic? [PDF]
Earth and Planetary Science Letters, 2001 Abstract The issue concerning the state of adiabaticity of mantle plumes has been examined in a cartesian two-dimensional box with an aspect-ratio of six. We have investigated in the quasi steady-state regime high Rayleigh number convection with both depth-dependent viscosity and thermal expansivity for both the Boussinesq and the extended Boussinesq
Ctirad Matyska, David A. Yuen
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X-Ray Spectrometry, EarlyView.ABSTRACT Portable X‐ray computed tomography (portable CT) has become an important tool for the non‐destructive investigation of cultural heritage objects, particularly when in situ analysis is required. This work presents the experimental characterization and application of a transportable cone‐beam CT system designed for the inspection of large and ...
Anderson de Paula +7 more
wiley +1 more source