Results 51 to 60 of about 1,154,465 (152)
Geochemistry, Geophysics, Geosystems, Volume 26, Issue 5, May 2025.Abstract The spatial extent of mixing between separately emplaced batches of magma is a key component in understanding the incremental assembly of plutons. Potassium feldspar megacrysts (>3 cm length) in granodioritic rocks are hypothesized to record magma mixing and transport over hundred kyr timescales.
Elena Watts +4 more
wiley +1 more source
Geochemistry, Geophysics, Geosystems, Volume 26, Issue 4, April 2025.Abstract Anticipating the onset of the 2020/2021 effusive‐explosive eruptive sequence at La Soufrière volcano, St. Vincent was challenging despite the established monitoring networks in operation. Here, we integrate petrological data to decipher retrospectively signs of imminent eruption from available pre‐eruptive monitoring data.
Michal Camejo‐Harry +8 more
wiley +1 more source
Cube-based diffusion algorithm [PDF]
, 2007 We study molecular diffusion in (linear) nanopores with different types of roughness in the so-called Knudsen regime. Knudsen diffusion represents the limiting case of molecular diffusion in pores, where mutual encounters of the molecules within the free
Kärger, Jörg +3 more
core +1 more source
AGU Advances, Volume 5, Issue 6, December 2024.Abstract Magmatic processes at the crust‐mantle boundary (i.e., Moho) are commonly studied post facto at fossil ophiolites, oceanic core complexes, or inferred from the compositions of crystals or melt inclusions. The 2021 eruption at Fagradalsfjall on the Reykjanes Peninsula, Iceland, was supplied from magma bodies near the Moho and offers a unique ...
E. W. Marshall +18 more
wiley +1 more source
Geochemistry, Geophysics, Geosystems, Volume 25, Issue 12, December 2024.Abstract CO2 is the first volatile to exsolve in magmatic systems and plays a crucial role in driving magma ascent and volcanic eruptions. Carbon stable isotopes serve as valuable tracers for understanding the transfer of CO2 from the melt to the gas phase during passive degassing or active eruptions.
Yves Moussallam +8 more
wiley +1 more source
Diffusion in nanocrystalline solids [PDF]
, 2005 Enhanced atomic migration was an early observation from experimental studies into nanocrystalline solids. This contribution presents an overview of the available diffusion data for simple metals and ionic materials in nanocrystalline form.
Chadwick, Alan V.
core +1 more source
Diffusion welding of nickel-based superalloys [PDF]
, 2011 Ni based superalloys can be welded by diffusion bonding. Temperature, diffusion coefficient, activation energy and Boltzmann constant influence the quality of diffusion bonding, so obtaining the best condition for welding is considered.
Rezaei, Hossein
core +1 more source
Driven diffusion in nanoscaled materials [PDF]
, 2015 Mass transfer processes in which specific interactions with environments lead to complex diffusion patterns, such as the occurrence of transient sub-diffusive behaviors or of heterogeneous diffusion, were studied by means of two different experimental ...
Heidernätsch, Mario +10 more
core +1 more source
Effective diffusion tensor computed by homogenization [PDF]
, 2013 The convergence of the long-time apparent diffusion tensor of diffusion magnetic resonance imaging (dMRI) to the effective diffusion tensor obtained by mathematical homogenization theory was considered for two-compartment geometric models containing non ...
Grebenkov, Denis +4 more
core +1 more source
Solid-state diffusion and NMR [PDF]
, 2005 Diffusion in solids, which requires the presence of crystal defects or disorder, has both microscopic and macroscopic aspects. Nuclear magnetic resonance techniques provide access to microscopic diffusion parameters like atomic jump rates and activation ...
Heitjans, Paul +2 more
core +1 more source