Results 311 to 320 of about 2,132,392 (379)

Partial Melting and Deformation

Reviews in Mineralogy and Geochemistry, 2002
The physical properties of partially molten rocks are directly coupled to the grain-scale as well as the broader scale distribution of the melt phase. At the grain scale, if melt forms isolated pockets in a silicate matrix, its influence on plastic flow is generally relatively minor.
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The Influence of Partial Melt on Mantle Convection

2012
The thermo-chemical evolution of a one-plate planet like Mars strongly influences its atmospheric evolution via volcanic outgassing, which is linked to the production of partial melt in the mantle. In earlier thermal evolution and convection models melt production has been considered by the release and consumption of latent heat, the formation of crust
Tilman Spohn, Ana-Catalina Plesa, Ana-Catalina Plesa   +2 more
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Granulites, partial melting and the rheology of the lower crust

Journal of Metamorphic Geology, 2011
International ...
Brown, Michael, Schulmann, Karel, White, R.W.   +2 more
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The influence of partial melting and melt migration on the rheology of the continental crust

Journal of Geodynamics, 2016
Abstract 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, Gustavo Viegas, Marcos Egydio da Silva, Carlos José Archanjo   +3 more
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Late Ordovician adakitic rocks in the Central Tianshan block, NW China: Partial melting of lower continental arc crust during back-arc basin opening

, 2016
Late Ordovician (ca. 451 Ma) calc-alkaline adakitic granodiorite and granite, associated with coeval S-type granites, were discovered in the Central Tianshan block, NW China.
Xiaoran Zhang, Guochun Zhao, P. Eizenhöfer, Min Sun, Yigui Han, W. Hou, Dongxing Liu, Bo Wang, Qian Liu, Bingqing Xu   +9 more
semanticscholar   +1 more source

Partial melting of crustal rocks

Engineering Geology, 1989
Abstract 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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Partial melting of metagreywackes, Part II. Compositions of minerals and melts

Contributions to Mineralogy and Petrology, 1997
A 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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Two episodes of partial melting in ultrahigh-pressure migmatites from deeply subducted continental crust in the Sulu orogen, China

, 2016
Partial melting plays an important role in the geodynamics of continental subduction zones. This is identified from a suite of ultrahigh-pressure (UHP) migmatites in the Sulu orogen through a combined study of zircon U-Pb ages, trace elements, and oxygen
Wan-Cai Li, Ren‐Xu Chen, Yong‐Fei Zheng, H. Tang, Zhaochu Hu   +4 more
semanticscholar   +1 more source

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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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 ...
M. J. O'Hara, M. J. O'Hara
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