Results 21 to 30 of about 2,125,195 (285)
Evidence of Volatile‐Induced Melting in the Northeast Asian Upper Mantle
Journal of Geophysical Research: Solid Earth, 2021 A seismic low velocity layer (LVL) above the mantle transition zone (MTZ), often thought to be caused by volatile‐induced melting, can significantly modulate planetary volatile cycles.
Yizhuo Sun +6 more
semanticscholar +1 more source
Distinct melting behaviour of partially oxidized Cu nanoparticles and nanowires [PDF]
arXiv, 2023 While most of the experimental studies are dealing with partially oxidized metallic nanosolids, their behaviour is not well understood theoretically. To this end we utilized molecular dynamics simulation and charge-optimized many-body potential to probe melting of Cu nanoparticles and nanowires with and without a monolayer of Cu$_2$O as a shell.
arxiv
Mercury's crustal thickness correlates with lateral variations in mantle melt production [PDF]
Geophysical Research Letters 47 (2020) e2020GL087261, 2020 Mercury's crust has a complex structure resulting from a billion years of volcanism. The surface variations in chemical composition have been identified from orbit by the spacecraft MESSENGER. Combining these measurements with laboratory experiments on partial melting, we estimate which variations in surface density and degree of mantle melting are ...
arxiv +1 more source
Effects of Partial Melting on Seismic Velocity and Attenuation: A New Insight from Experiments
, 2017 The effects of partial melting on seismic velocity and attenuation have long been studied by focusing on the direct effects of melt, such as the poroelastic effect. The direct effects are generally very small for a very small melt fraction.
Y. Takei
semanticscholar +1 more source
Surface Melting and Breakup of Metal Nanowires: Theory and Molecular Dynamics Simulations [PDF]
, 2018 We consider the surface melting of metal nanowires by solving a phenomenological two-parabola Landau model and by conducting molecular dynamics simulations of nickel and aluminium nanowires. The model suggests that surface melting will precede bulk melting when the spreading parameter $\Delta \gamma$ for the melt in contact with the solid surface is ...
arxiv +1 more source
Circular objects do not melt the slowest in water [PDF]
, 2023 We report on the melting dynamics of ice suspended in fresh water and subject to natural convective flows. Using direct numerical simulations we investigate the melt rate of ellipsoidal objects for $2.32\times 10^4 \leq \text{Ra} \leq 7.61\times 10^8$, where \text{Ra} is the Rayleigh number defined with the temperature difference between the ice and ...
arxiv +1 more source
Seismic evidence for partial melting at the root of major hot spot plumes
Science, 2017 Iceland's molten roots Major hot spot plumes are responsible for basaltic ocean island chains such as Hawaii. Yuan and Romanowicz used seismic tomography, which constructs an x-ray–like picture of Earth's interior from seismic waves, to show that the ...
K. Yuan, B. Romanowicz
semanticscholar +1 more source
An experimental test of the viscous anisotropy hypothesis for partially molten rocks [PDF]
, 2014 Chemical differentiation of rocky planets occurs by melt segregation away from the region of melting. The mechanics of this process, however, are complex and incompletely understood. In partially molten rocks undergoing shear deformation, melt pockets between grains align coherently in the stress field; it has been hypothesized that this anisotropy in ...
arxiv +1 more source
Multiscale approach to equilibrating model polymer melts [PDF]
Phys. Rev. E 94, 032502 (2016), 2016 We present an effective and simple multiscale method for equilibrating Kremer Grest model polymer melts of varying stiffness. In our approach, we progressively equilibrate the melt structure above the tube scale, inside the tube and finally at the monomeric scale. We make use of models designed to be computationally effective at each scale.
arxiv +1 more source
High‐grade metamorphism and partial melting in Archean composite grey gneiss complexes
, 2017 Much of the exposed Archean crust is composed of composite gneiss which includes a large proportion of intermediate to tonalitic material. These gneiss terranes were typically metamorphosed to amphibolite to granulite facies conditions, with evidence for
R. White, R. Palin, E. Green
semanticscholar +1 more source