Results 51 to 60 of about 24,714 (224)
On the evolution of the water ocean in the plate-mantle system
Progress in Earth and Planetary Science, 2018 Here, we investigate a possible scenario of surface seawater evolution in the numerical simulations of surface plate motion driven by mantle dynamics, including thermo-chemical convection and water migration, from the early to present-day Earth to ...
Takashi Nakagawa +3 more
doaj +1 more source
Tectonic plates in 3D mantle convection model with stress-history-dependent rheology
Earth, Planets and Space, 2020 Plate tectonics is a key feature of the dynamics of the Earth’s mantle. By taking into account the stress-history-dependent rheology of mantle materials, we succeeded in realistically producing tectonic plates in our numerical model of mantle convection ...
Takehiro Miyagoshi +2 more
doaj +1 more source
Remote Sensing, 2023 The Afar and Ethiopian plateaus are in a dynamic uplift due to the mantle plume, therefore, considering the plume effect is necessary for any geophysical investigation including the estimation of lithospheric stress in this area. The Earth gravity models
Andenet A. Gedamu +2 more
doaj +1 more source
On the location of plumes and lateral movement of thermochemical structures with high bulk modulus in the 3-D compressible mantle [PDF]
, 2011 The two large low shear velocity provinces (LLSVPs) at the base of the lower mantle are prominent features in all shear wave tomography models. Various lines of evidence suggest that the LLSVPs are thermochemical and are stable on the order of hundreds ...
Gurnis, Michael +3 more
core +1 more source
Geochemistry, Geophysics, GeosystemsMineral phase transitions can either hinder or accelerate mantle flow. In the present day, the formation of the bridgmanite + ferropericlase assemblage from ringwoodite at 660 km depth has been found to cause weak and intermittent layering of mantle ...
Ranpeng Li +4 more
doaj +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
Osmium isotopes and mantle convection [PDF]
Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences, 2002 The decay of (187)Re to (187)Os (with a half-life of 42 billion years) provides a unique isotopic fingerprint for tracing the evolution of crustal materials and mantle residues in the convecting mantle. Ancient subcontinental mantle lithosphere has uniquely low Re/Os and (187)Os/(188)Os ratios due to large-degree melt extraction, recording ancient melt-
openaire +2 more sources
Physical State of the Deep Interior of the CoRoT-7b Exoplanet [PDF]
, 2010 The present study takes the CoRoT-7b exoplanet as an analogue for massive terrestrial planets to investigate conditions, under which intrinsic magnetic fields could be sustained in liquid cores.
Bruntt +10 more
core +1 more source
A Simple Thermodynamic Model of the Internal Convective Zone of the Earth
Entropy, 2018 As it is well known both atmospheric and mantle convection are very complex phenomena. The dynamical description of these processes is a very difficult task involving complicated 2-D or 3-D mathematical models.
Karen Arango-Reyes +3 more
doaj +1 more source
Implementation and application of adaptive mesh refinement for thermochemical mantle convection studies [PDF]
, 2011 Numerical modeling of mantle convection is challenging. Owing to the multiscale nature of mantle dynamics, high resolution is often required in localized regions, with coarser resolution being sufficient elsewhere.
Leng, Wei, Zhong, Shijie
core