Results 241 to 250 of about 9,710 (277)

Rheological transitions and the progress of melting of crustal rocks

Earth and Planetary Science Letters, 1998
Abstract High-grade igneous and metamorphic systems which possess a variable percentage of melt, may undergo a transition between crystal-supported and fully fluid behavior. The melt-fraction interval over which this transition occurs is not well constrained. We have conducted six series of numerical simulations of crustal melting using melt-fraction
Scott A Barboza, George W Bergantz
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Behaviour of zircon and monazite during crustal melting

Journal of the Geological Society, 2014
Ages retrieved from accessory minerals in high-grade metamorphic rocks place important constraints on the timing of events and the rates of tectonometamorphic processes operating in the deep crust. In suprasolidus rocks, the dissolution and growth of zircon and monazite are strongly dependent on the P–T conditions ...
Chris Yakymchuk, Michael Brown
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Melting the myth: Prograde garnet dissolves during early crustal melting

Geology
Abstract Garnet is widely thought to increase in stability and volume during prograde metamorphism and partial melting. Yet, whether early-formed subsolidus garnet persists or breaks down when melting begins remains an open question.
Lucas R. Tesser, Pierre Lanari, Jacob B. Forshaw, Thorsten A. Markmann, Mathias Hueck, Benita Putlitz, Noralinde de Leijer, Cauê R. Cioffi, Miguel A.S. Basei, Carlos E. Ganade   +9 more
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Crustal melting and granite magmatism: key issues

Physics and Chemistry of the Earth, Part A: Solid Earth and Geodesy, 2001
Abstract The thermal and rheological structure of orogens determines their mechanical behaviour. Collosional orogens are characterized by a clockwise P-T evolution, which means that in the core, where temperatures exceed the wet solidus for common crustal rocks, melt may be present during orogenesis.
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Controls on the trace element composition of crustal melts

Earth and Environmental Science Transactions of the Royal Society of Edinburgh, 1996
ABSTRACT:The behaviour of trace elements during partial melting depends primarily on their mode of occurrence. For elements occurring as trace constituents of major phases (e.g. Li, Rb, Cs, Eu, Sr, Ba, Ga, etc.), slow intracrystalline diffusion (D ≍ 10−16 cm2 s−1) at the temperature range of crustal anatexis causes all effective crystal-melt partition ...
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Electrical conductivity of water‐undersaturated crustal melting

Journal of Geophysical Research: Solid Earth, 1986
Water‐undersaturated melting in the crust can occur at lithostatic pressure in the presence of an H2O‐CO2 fluid, of no CO2 or fluid but with all H2O bound structurally in hydrous minerals, or of an insufficient amount of H2O fluid to saturate a melt at liquidus temperatures. The composition of any fluid in equilibrium with possible source rocks depends
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Conditions during the formation of granitic magmas by crustal melting – Hot or cold; drenched, damp or dry?

Earth-Science Reviews, 2020
Gary Stevens, Scott E Bryan
exaly  

Prograde and retrograde processes in crustal melting

Lithos, 2001
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Adakite generation as a result of fluid-fluxed melting at normal lower crustal pressures

Earth and Planetary Science Letters, 2022
Xiangsong Wang, Roberto F Weinberg, Keda Cai   +2 more
exaly  

Crustal melting beneath orogenic plateaus: Insights from 3-D thermo-mechanical modeling

Tectonophysics, 2019
Lin Chen, Xiaodong Song, Taras Gerya
exaly