Thermal contraints on high-pressure granulite metamorphism of supracrustal rocks [PDF]
The circumstances leading to the formation and exposure at the Earth's surface of supracrustal granulites are examined. These are defined as sediments, volcanics, and other rock units which originally formed at the surface of the Earth, were ...
Ashwal, L. D., Leslie, W. W., Morgan, P.
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Effects of water and fluorine on the viscosity of albite melt at high pressure: a preliminary investigation [PDF]
The viscosities of fluorine- and water-bearing melts based on albite composition have been determined at 7.5, 15 and 22.5 kbar by the falling-sphere method. All melt viscosities decrease isothermally with increasing pressure.
Arndt +41 more
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Electron Microprobe Chemical Dating of Uraninite as a Reconnaissance Tool for Leucogranite Geochronology [PDF]
We suggest that electron microprobe techniques may be employed to date Tertiary samples of uraninite (UO~2~), which can contain very high concentrations of radiogenic Pb after only a few million of years of U and Th decay. Although uraninite is regarded
Jahandar Ramezani +4 more
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Late Archean crust-mantle interactions: geochemistry of LREE-enriched mantle derived magmas. Example of the Closepet batholith, southern India [PDF]
The Closepet batholith in South India is generally considered as a typical crustal granite emplaced 2.5 Gyr ago and derived through partial melting of the surrounding Peninsular Gneisses (3.3-3.0 Gyr). In the field, it appears as a composite batholith
Jayananda, M. +3 more
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Rapid endogenic rock recycling in magmatic arcs. [PDF]
Li JY +8 more
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Regional significance of volcanic geochemistry in the Far Triple Junction, Ethiopia [PDF]
Regional significance of volcanic geochemistry in far Triple Junction ...
Mohr, P. A.
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Crustal growth: Some major problems [PDF]
Fundamental problems with models currently used to explain the genesis and evolution of continental crust were raised. These problems focus around the difficulty of generating the upper continental crust from a lower crustal or mantle protolith without ...
Arculus, R. J.
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International audienceThe emplacement of the Manaslu leucogranite body (Nepal, Himalaya) has been modelled as the accretion of successive sills. The leucogranite is characterized by isotopic heterogeneities suggesting limited magma convection, and by a ...
Annen, Catherine +2 more
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Discusión sobre el matamorfismo regional del Guadarrama oriental (Sistema Central español) [PDF]
Se aportan datos que confirman que el metamorfismo del Guadarrama oriental corresponde al tipo distena-sillimanita, con un desarrollo zona1 que tiene grandes analogías con el trictaniorfismo barrowiense.
Fuster Casas, José María +1 more
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Geology of Byobu Rock and Gobanme Rock, Prince Olav Coast, East Antarctica [PDF]
We report here the geology of Byobu Rock and Gobanme Rock outcrops hitherto unmapped in the Prince Olav Coast, East Antarctica. Both these outcrops expose high-grade metamorphic and igneous rocks.
M. Satish-Kumar +3 more
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