Results 331 to 340 of about 2,429,367 (395)

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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Experimental deformation of partially-melted granite

Contributions to Mineralogy and Petrology, 1979
An account is given of the experimental deformation of partially-melted granite with melt fractions up to 25% at 800 °C and 300 MPa confining pressure in constant strainrate tests between 10−3 and 10−6 S−1, creep tests and cycling tests. Microscopic study reveals that under these conditions most of the uniform deformation prior to macroscopic shear ...
Paterson, M. S., Molen, I. van der
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Asthenospheric low-velocity zone consistent with globally prevalent partial melting

Nature Geoscience, 2023
J. Hua, K. Fischer, T. Becker, E. Gazel, G. Hirth   +4 more
semanticscholar   +1 more source

Partial melting under spreading ridges

Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1978
Factors of importance in partial melting calculations are discussed. The thermal evolution of a geochemical and petrological model of the upwelling asthenosphere beneath a ridge crest is studied numerically. Partial melting, basalt eruption and differentiation of the upwelling asthenosphere is modelled. Melt distribution and density distribution in the
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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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Rare elements enrichment in crustal peraluminous magmas: insights from partial melting experiments

Contributions to Mineralogy and Petrology, 2021
J. Michaud, M. Pichavant, A. Villaros
semanticscholar   +1 more source

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 of bulk NdBa2Cu3O7−δ

Il Nuovo Cimento D, 1994
Two procedures of partial melting of bulk NdBa2Cu3O7−δ, in air and in reduced oxygen pressure, were developed. When the treatment was carried out in air, poor superconducting properties were observed. On the contrary, when the treatment was carried in PO2=1.3 mbar, good properties were obtained, with Tconset=93 K and 100% shielding at lower ...
M. Marella, M. Tomaselli, L. Meregalli, C. Ferdeghini, A. S. Siri   +4 more
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Partial melting in the upper mantle

Physics of the Earth and Planetary Interiors, 1970
The 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 and flow of orogens

Tectonophysics, 2001
Abstract A comparison of large orogenic belts formed at convergent plate boundaries indicates that orogenic evolution comprises a period of crustal thickening followed by the formation of a continental plateau and commonly syn- to post-convergence extension and thinning of the previously thickened crust.
Olivier Vanderhaeghe, Christian Teyssier
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