Results 31 to 40 of about 373,536 (210)

Transition from Icosahedral to Decahedral Structure in a Coexisting Solid-Liquid Nickel Cluster

, 2005
We have used molecular dynamics simulations to construct a microcanonical caloric curve for a 1415-atom Ni icosahedron. Prior to melting the Ni cluster exhibits static solid-liquid phase coexistence.
D. Schebarchov, O. H. Nielsen, S. C. Hendy   +2 more
core   +1 more source

A geochemical study of the winonaites: Evidence for limited partial melting and constraints on the precursor composition [PDF]

, 2017
The winonaites are primitive achondrites which are associated with the IAB iron meteorites. Textural evidence implies heating to at least the Fe, Ni–FeS cotectic, but previous geochemical studies are ambiguous about the extent of silicate melting in ...
Benedix, Gretchen K., Bland, Philip A., Hammond, Samantha J., Hunt, Alison C., Kreissig, Katharina, Rehkämper, Mark, Strekopytov, Stanislav   +6 more
core   +2 more sources

Voluminous magma formation for the 30-ka Aira caldera-forming eruption in SW Japan: contributions of crust-derived felsic and mafic magmas

Frontiers in Earth Science
Understanding the origin, assembly, and evolution of voluminous magma that erupts in catastrophic caldera-forming eruptions (CCFEs) is a community imperative. A CCFE of the Aira caldera at 30 ka discharged over 350 km3 of magma, which can be grouped into
Ayumu Nishihara, Ayumu Nishihara, Ayumu Nishihara, Yoshiyuki Tatsumi, Katsuya Kaneko, Jun-Ichi Kimura, Qing Chang, Nobuo Geshi, Takashi Miyazaki, Bogdan Stefanov Vaglarov, Hironobu Hinata, Keiko Suzuki-Kamata   +11 more
doaj   +1 more source

Shock-induced melting of MgSiO_3 perovskite and implications for melts in Earth's lowermost mantle [PDF]

, 2004
New shock wave equation of state (EOS) data for enstatite and MgSiO_3 glass constrain the density change upon melting of Mg-silicate perovskite up to 200 GPa. The melt becomes denser than perovskite near the base of Earth's lower mantle.
Ahrens, Thomas J., Akins, Joseph A., Asimow, Paul D., Luo, Sheng-Nian   +3 more
core  

Commensurate-Incommensurate transition in the melting process of the orbital ordering in Pr0.5Ca0.5MnO3: neutron diffraction study

, 2001
The melting process of the orbital order in Pr0.5Ca0.5MnO3 single crystal has been studied in detail as a function of temperature by neutron diffraction.
A. Barnabé, A. Barnabé, C.H. Chen, C.H. Chen, E.O. Wollan, H. Kuwahara, H. Yoshizawa, H. Yoshizawa, H. Yoshizawa, J.B. Goodenough, M.v. Zimmermann, P.G. Radaelli, R. Kajimoto, R. Kajimoto, S. Mori, S. Mori, S. Shimomura, Y. Tokura, Y. Tomioka, Y. Tomioka, Y. Tomioka, Z. Jirák, Z. Jirák   +22 more
core   +1 more source

Tertiary-Quaternary intra-plate magmatism in Europe and its relationship to mantle dynamics [PDF]

, 2006
Anorogenic intra-plate magmatism was widespread in Europe from early Tertiary to Recent times, extending west to east from Spain to Bulgaria, and south to north from Sicily to northern Germany. Magmatism is spatially and temporally associated with Alpine-
Downes, Hilary, Wilson, M.
core   +1 more source

Variable Upper Mantle Geochemical Processes Constrained From Independent Component Analysis of the Fizh Massif, Northern Oman Ophiolite

Geochemistry, Geophysics, Geosystems
We statistically analyzed the whole‐rock compositions of peridotites in the Oman ophiolite using a multivariate statistical technique called independent component analysis (ICA) to better understand the processes within the ophiolitic mantle section that
Yuto Miki, Eiichi Takazawa, Kenta Ueki, Tatsu Kuwatani   +3 more
doaj   +1 more source

The 1.79 Ga Särkilahti leucogranite – a horizontal magma layer below granulite-grade migmatites in SE Finland [PDF]

Bulletin of the Geological Society of Finland, 2019
The heterogeneous, peraluminous Särkilahti garnet-cordierite leucogranite occupies ~ 75 km2 area in Svecofennian granulite-grade terrain of SE Finland. Country rocks are metasedimentary garnet-cordierite-biotite migmatites with some orthopyroxenegarnet ...
Hannu Mäkitie, Hugh O´Brien, Olavi Selonen, Matti Kurhila   +3 more
doaj   +1 more source

Capillary Condensation, Freezing, and Melting in Silica Nanopores: A Sorption Isotherm and Scanning Calorimetry Study on Nitrogen in Mesoporous SBA-15

, 2012
Condensation, melting and freezing of nitrogen in a powder of mesoporous silica grains (SBA-15) has been studied by combined volumetric sorption isotherm and scanning calorimetry measurements.
F. Schüth, Klaus Knorr, Patrick Huber, S. Schoen and M. Klapp, Sebastian T. Moerz   +4 more
core   +1 more source

"Early partial melting" in annealed natural cordierites

European Journal of Mineralogy, 2002
Natural cordierite crystals with a range of Mg:Fe ratios have been annealed at a range of temperatures between 1200 and 1430°C (under controlled f o2 ), after previously being annealed at 900 °C to drive off any volatiles contained within their channels. Complex microstructures were observed in these samples by transmission electron microscopy.
Capitani, G, Doukhan, J, Malchereck, T, Carpenter, M.   +3 more
openaire   +1 more source