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Partial melting in the upper mantle
Physics of the Earth and Planetary Interiors, 1970The low velocity zone in tectonic and oceanic regions is too pronounced to be the effect of high temperature gradients alone. Partial melting is consistent with the low velocity, low Q and abrupt boundaries of this region of the upper mantle and is also consistent with measured heat flow values.
Anderson, Don L., Sammis, Charles
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Partial melting of metagreywackes, Part II. Compositions of minerals and melts
Contributions to Mineralogy and Petrology, 1997A series of experiments on the fluid-absent melting of a quartz-rich aluminous metagreywacke has been carried out. In this paper, we report the chemical composition of the phases present in the experimental charges as determined by electron microprobe.
Jean-Marc Montel, Daniel Vielzeuf
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Partial melting of crustal rocks
Engineering Geology, 1989Abstract Shales and graywackes were first metamorphosed at 650°C and then partially melted at 700 and 750°C at 2, 4, 6, and 8 kilobars in the presence of 0.75m NaCl−0.45m KCl and 0.225m CaCl2−0.750m NaCl solutions. In experiments with shales,KK+Na ratio in the decreases with increasing pressure at 650 and 700°C; however, at 750°C this ratio is equal ...
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The influence of partial melting and melt migration on the rheology of the continental crust
Journal of Geodynamics, 2016Abstract The presence of melt during deformation produces a drastic change in the rheological behavior of the continental crust; rock strength is decreased even for melt fractions as low as ∼7%. At pressure/temperature conditions typical of the middle to lower crust, melt-bearing systems may play a critical role in the process of strain localization ...
Geane Carolina G. Cavalcante +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, 1999Abstract 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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Partial Melting and Melt Segregation in a Convecting Mantle
2000Various 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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Attenuation in partially melted material
Journal of Geophysical Research, 1968Expressions 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, 2004Abstract 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, 1994The 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 +2 more
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Partial melting and recrystallization of isotactic polypropylene
Chinese Journal of Polymer Science, 2009A 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 +5 more
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