Results 31 to 40 of about 5,696 (230)

A joint geochemical–geophysical record of time-dependent mantle convection south of Iceland [PDF]

, 2014
The North Atlantic V-Shaped Ridges (VSRs) provide a spatially extensive and clear record of unsteady mantle convective circulation over >40 My>40 My.
Jones, S.M.; id_orcid, White, Nicholas J., Murton, Bramley, Maclennan, John, Jones, Steve, Walters, Rachel J., Walters, R.L., White, Nicky, Maclennan, J., Murton, Bramley J., Fitton, J.G., Fitton, J. G., Jones, S.M., Fitton, J. Godfrey, White, N.J., Murton, B.J., Jones, Stephen M.   +16 more
core   +1 more source

Large-scale adaptive mantle convection simulation [PDF]

A new generation, parallel adaptive-mesh mantle convection code, Rhea, is described and benchmarked. Rhea targets large-scale mantle convection simulations on parallel computers, and thus has been developed with a strong focus on computational efficiency
Wilcox, Lucas C., Gurnis, Michael, Ghattas, Omar, Burstedde, Carsten, Tan, Eh, Alisic, Laura, Stadler, Georg   +6 more
core   +1 more source

Assessing the role of slab rheology in coupled plate-mantle convection models [PDF]

, 2015
International audienceAssessing the role of slab rheology in coupled plate-mantle convection models. Earth and Planetary Science Letters 430, 191-201. Abstract Reconstructing the 3D structure of the Earth's mantle has been a challenge for geodynamicists ...
Bello, Léa, Tackley, Paul J., Müller, R.D., Coltice, Nicolas, Cannon, John   +4 more
core   +1 more source

Mantle pseudo-isochrons revisited [PDF]

The 2.0 Ga pseudo-isochron age inferred from the mid-ocean ridge basalt 207Pb/204Pb against 206Pb/204Pb diagram is reexamined on the basis of a statistical box model of mantle processes.
Rudge, J. F.
core   +1 more source

Anisotropic Convection Model for the Earth’s Mantle [PDF]

, 2003
The paper presents a theory for modeling flow in anisotropic, viscous rock. This theory has originally been developed for the simulation of large deformation processes including the folding and kinking of multi-layered visco-elastic rock (Muhlhaus et al. [1,2]). The orientation of slip planes in the context of crystallographic slip is determined by the
Hans-B. Mühlhaus, M. Cada, Louis Moresi
openaire   +4 more sources

Europa's Ocean Translates Interior Tidal Heating Patterns to the Ice‐Ocean Boundary

AGU Advances, 2023
The circulation in Europa's ocean determines the degree of thermal, mechanical and chemical coupling between the ice shell and the silicate mantle. Using global direct numerical simulations, we investigate the effect of heterogeneous tidal heating in the
D. G. Lemasquerier, C. J. Bierson, K. M. Soderlund   +2 more
doaj   +1 more source

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

Gas check prevention during calendering of poly(vinyl chloride) films using poly(caprolactone)‐based additives

Journal of Vinyl and Additive Technology, Volume 31, Issue 2, Page 441-452, March 2025.
Three poly(caprolactone) (PCL)‐based additives of differing molecular weights were used as a secondary plasticizer to prevent gas checks in PVC films produced through calendering. Results showed that chemical and physicochemical properties influence the prevention or reduction of gas checks, unlike rheological properties including complex viscosity and
Luis F. Alvarez, Kushal Panchal, Richard L. Leask, Milan Maric, Jim A. Nicell   +4 more
wiley   +1 more source

Shear-velocity structure of the Tyrrhenian Sea: Tectonics, volcanism and mantle (de)hydration of a back-arc basin [PDF]

, 2014
The Tyrrhenian Sea in the Mediterranean formed as the result of roll-back of the Adriatic and Ionian subducting plates. It is mostly underlain by strongly thinned continental lithosphere, but contains two small oceanic basins in the southern Tyrrhenian ...
van Bergen, Manfred, Paulssen, H., Petrology, Seismology, Greve, Sonja, Paulssen, Hanneke, Goes, Saskia, Goes, S., Greve, S., van Bergen, M., CRYSTAL2PLATE: How does plate tectonics work: from crystal-scale processes to mantle convection with self-consistent plates   +10 more
core   +1 more source

Difference and the Liberation of Sufficient Reason

European Journal of Philosophy, EarlyView.
Abstract The Principle of Sufficient Reason (PSR) holds that every event and entity can be explained by a sufficient reason or cause. Philosophers have long struggled with the question of the PSR's compatibility with freedom, for if what occurs or exists follows necessarily from its sufficient reason then it seems it could not have been otherwise ...
Louis Matheou
wiley   +1 more source