Results 31 to 40 of about 96,005 (268)
Journal of Geography (Chigaku Zasshi), 2005 Recent progress of numerical simulations on the dynamo process in the core and the mantle convection provides a clue to understanding the origin of global variations of the Earth system during the last 150 Ma, in which long-term variations of geomagnetic reversal frequency and mantle activity are closely related in time.
Yozo HAMANO +2 more
openaire +2 more sources
Elastic properties of silicate melts: Implications for low velocity zones at the lithosphere-asthenosphere boundary. [PDF]
, 2017 Low seismic velocity regions in the mantle and crust are commonly attributed to the presence of silicate melts. Determining melt volume and geometric distribution is fundamental to understanding planetary dynamics.
Clark, Alisha N, Lesher, Charles E
core +2 more sources
Influence of the Thickness of the Overriding Plate on Convergence Zone Dynamics
Geochemistry, Geophysics, Geosystems, 2020 The important role played by the upper plate in convergence zones dynamics has long been underestimated but is now more and more emphasized. However, the influence of its thickness and/or strength on orogenic systems evolution remains largely unknown ...
Solenn Hertgen +5 more
doaj +1 more source
Testing the effects of basic numerical implementations of water migration on models of subduction dynamics [PDF]
Solid Earth, 2014 Subduction of oceanic lithosphere brings water into the Earth's upper mantle. Previous numerical studies have shown how slab dehydration and mantle hydration can impact the dynamics of a subduction system by allowing a more vigorous ...
M. E. T. Quinquis, S. J. H. Buiter
doaj +1 more source
Onset of solid-state mantle convection and mixing during magma ocean solidification [PDF]
, 2016 ©2017. American Geophysical UnionThe energy sources involved in the early stages of the formation of terrestrial bodies can induce partial or even complete melting of the mantle, leading to the emergence of magma oceans. The fractional crystallization of
Breuer, Doris +5 more
core +4 more sources
Geochemistry, Geophysics, Geosystems, 2018 Large polar motions are observed in the apparent polar wander paths of several continents during the Ediacaran. Among various hypotheses proposed in the literature, one consists of the occurrence of two successive fast and large true polar wander (TPW ...
Boris Robert +2 more
doaj +1 more source
Dynamic Earth: crustal and mantle heterogeneity
Australian Journal of Earth Sciences, 2008 The dynamic processes within the Earth leave their record in geophysical and geochemical variation about the general stratification with depth. A snapshot of current structure is provided by geophysical evidence, whereas geochemical information provides a perspective over the age of the Earth.
Kennett, Brian, Tkalčić, Hrvoje
openaire +2 more sources
China Geology: The ultramafic massif of Feragen, which belongs to the eastern ophiolitic belt of Norway, has abundant amounts of chromite ores. Recent studies have revealed a complex melt evolution in a supra-subduction zone (SSZ) environment. This study presents new
Tian Qiu +4 more
doaj +1 more source
The elastic constants of MgSiO3 perovskite at pressures and temperatures of the Earth's mantle
, 2009 The temperature anomalies in the Earth's mantle associated with thermal convection1 can be inferred from seismic tomography, provided that the elastic properties of mantle minerals are known as a function of temperature at mantle pressures.
AR Oganov +29 more
core +1 more source
Strong plates enhance mantle mixing in early Earth
Nature Communications, 2018 The subducting plates can either penetrate straight into the lower mantle or flatten in the mantle transition zone, yet slab dynamics in the past remains unclear.
Roberto Agrusta +2 more
doaj +1 more source