Results 221 to 230 of about 76,426 (269)

Partial Melting and Melt Segregation in a Convecting Mantle

2000
Various causes for mantle melting (decompression, heating or release of water) combined with current estimates of upper mantle temperatures and the state of stress in the lithosphere suggest that in many regions the asthenosphere might be partially molten, but melts may not always be able to rise to the surface.
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Partial melting and melt migration in the acapulcoite-lodranite parent body

Geochimica et Cosmochimica Acta, 1997
We review petrologic evidence that the acapulcoites and lodranites formed by < 1 vol% to probably 20 vol% whole rock partial melting of a chondritic precursor material. At low degrees of partial melting, only Fe,Ni---FeS cotectic melting occurred.
McCoy, Timothy J., Keil, K., Muenow, D. W., Wilson, L.   +3 more
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Criteria for the recognition of partial melting

Physics and Chemistry of the Earth, Part A: Solid Earth and Geodesy, 1999
Abstract Partial melting changes rocks from single phase (solid) to two phase (solid+melt) systems. The bulk viscosity decreases as the melt fraction increases and this effect raises the rate of deformation and heat transfer, as well as causing crustal differentiation.
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Attenuation in partially melted material

Journal of Geophysical Research, 1968
Expressions for the complex moduli are derived for two models that simulate the structure of partially melted material. In one model, isolated lens-shaped inclusions of melt form the liquid phase, whereas in the other model the liquid phase is a continuous film of melt surrounding approximately spherical solid grains.
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Partial melting of filamentary Ho1Ba2Cu3Ox superconductors

Physica C: Superconductivity, 2004
Abstract We prepared precursor filamentary Ho 1 Ba 2 Cu 3 O x superconductors by a solution spinning. The filamentary precursor was partially melted in flowing O 2 under various heating conditions. The J c value of the sample was strongly dependent on the flowing O 2 rate.
E. Sato, T. Goto, K. Watanabe
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Partial melting of subducting oceanic crust

Earth and Planetary Science Letters, 1994
The conditions under which partial melting of subducting oceanic crust occurs can be determined by combining a partial melting model for basaltic compositions with two-dimensional thermal models of subduction zones. For porosities of ~ 1% containing H20 the amount of partial melt generated at the wet basaltic solidus is limited to ~ 100 MPa) can be ...
Simon M. Peacock, Tracy Rushmer, Alan Bruce Thompson   +2 more
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Partial melting and recrystallization of isotactic polypropylene

Chinese Journal of Polymer Science, 2009
A relatively high predetermined crystallization temperature (135°C) was chosen to grow well developed iPP spherulites, then the partial melting was carried out at a temperature of 165°C, where the preformed spherulites were seen to only decrease their size but not completely melted.
Tian-nan Zhou, Hong Yang, Nan-ying Ning, Yu-fang Xiang, Rong-ni Du, Qiang Fu   +5 more
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Importance of the ‘shape’ of the melting regime during partial melting of the mantle

Nature, 1985
The amount of melt formed in individual stream lines of upper mantle rocks passing through a partial melting regime increases from zero at the edge to a maximum at the central axis. Relationships between aggregated liquid compositions from such melting regimes and the source mantle should be obained by integration of the appropriate equations for ...
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Melting and dissolution kinetics: Application to partial melting and dissolution of xenoliths

Journal of Geophysical Research: Solid Earth, 1986
Kinetics of melting and dissolution (rates and textures) in magmatic systems is reviewed and applied to partial melting and dissolution of xenoliths. Special attention is paid to melting/dissolution of solid solution crystals, in which characteristic cloudy textures are formed, and diffusion of elements in the crystals plays an important role due to ...
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A model for estimating the composition of partial melts

Mineralogy and Petrology, 1995
A model is presented for estimating the major element composition of almost any partial melt derived from natural silicate rocks, given that the source composition and physical conditions of melting are known. Another model allows the estimation of water solubility in silicate melts.
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