FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2044725228> ?p ?o ?g. }

• W2044725228 endingPage "212" @default.
• W2044725228 startingPage "201" @default.
• W2044725228 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. Field observations of eroded orogens show that middle crust is migmatitic, and geophysical observations have been interpreted to suggest the presence of melt in active orogens. Indeed, the vol. % melt in some active orogens has been estimated by conductivity modelling, assuming that melt is the cause of the anomalies recorded in the data and based on laboratory experiments to calibrate the models. A consequence of these results is that orogenic collapse in mature orogens may be controlled by a partially-molten layer that decouples weak crust from subducting lithosphere, and such a weak layer may enable exhumation of deeply buried crust. Field observations in ancient orogens show that melt segregation and extraction are syntectonic processes, and that melt migration pathways commonly relate to rock fabrics. These processes are being investigated using analog and numerical models. Leucosomes in depleted migmatites record the remnant permeability network, but evolution of permeability networks and amplification of anomalies are poorly understood. Melt segregation and extraction may be cyclic or continuous, depending on the level of applied differential stress and rate of melt pressure buildup. During the clockwise P-T evolution, H2O is transferred from protolith to melt as rocks cross dehydration melting reactions, and H2O may be evolved at low P by crossing supra-solidus decompression—dehydration reactions if micas remain in the depleted protolith. The presence of crystallizing melt or H2O may enable reaction during cooling. However, metasomatism in the evolution of the crust remains a contentious issue. Processes in the lowermost crust may be inferred from studies of xenolith suites brought to the surface in lavas. Using geochemical data, statistical methods and modeling may be applied to evaluate whether migmatites are sources or magma transfer zones for granites, or simply segregated melt that was stagnant in residue, and to compare xenoliths of inferred lower crust with exposed deep crust. Upper crustal granites are a necessary complement to melt-depleted granulites common in the lower crust, but the role of mafic magma in crustal melting remains uncertain. Plutons occur at various depths above and below the brittle-to-viscous transition in the crust and have a variety of 3-D shapes that may vary systematically with depth. The switch from ascent to emplacement may be caused by amplification of instabilities within (permeability, magma flow rate) or surrounding (strength or state of stress) the ascent column, or by the ascending magma intersecting some discontinuity in the crust. Pluton emplacement mechanics are being investigated by modeling. Feedback relations among these processes may moderate compatibility between rates of pluton filling, magma ascent and melt extraction." @default.
• W2044725228 created "2016-06-24" @default.
• W2044725228 creator A5015954930 @default.
• W2044725228 date "2001-04-01" @default.
• W2044725228 modified "2023-10-03" @default.
• W2044725228 title "Crustal melting and granite magmatism: key issues" @default.
• W2044725228 cites W1526594253 @default.
• W2044725228 cites W1922701939 @default.
• W2044725228 cites W1963649432 @default.
• W2044725228 cites W1964617878 @default.
• W2044725228 cites W1967082613 @default.
• W2044725228 cites W1967347520 @default.
• W2044725228 cites W1967571498 @default.
• W2044725228 cites W1967950238 @default.
• W2044725228 cites W1973012528 @default.
• W2044725228 cites W1975548200 @default.
• W2044725228 cites W1977656169 @default.
• W2044725228 cites W1978016693 @default.
• W2044725228 cites W1978841428 @default.
• W2044725228 cites W1980680282 @default.
• W2044725228 cites W1981899274 @default.
• W2044725228 cites W1986617644 @default.
• W2044725228 cites W1989905077 @default.
• W2044725228 cites W1990342309 @default.
• W2044725228 cites W1991919649 @default.
• W2044725228 cites W1993086472 @default.
• W2044725228 cites W1996819318 @default.
• W2044725228 cites W1998961219 @default.
• W2044725228 cites W2000713509 @default.
• W2044725228 cites W2002655845 @default.
• W2044725228 cites W2003046211 @default.
• W2044725228 cites W2004409367 @default.
• W2044725228 cites W2008591480 @default.
• W2044725228 cites W2009145927 @default.
• W2044725228 cites W2012471105 @default.
• W2044725228 cites W2012542327 @default.
• W2044725228 cites W2013919214 @default.
• W2044725228 cites W2013924996 @default.
• W2044725228 cites W2014473780 @default.
• W2044725228 cites W2015966567 @default.
• W2044725228 cites W2021972693 @default.
• W2044725228 cites W2022017333 @default.
• W2044725228 cites W2024265612 @default.
• W2044725228 cites W2024379095 @default.
• W2044725228 cites W2025214997 @default.
• W2044725228 cites W2026723211 @default.
• W2044725228 cites W2026899000 @default.
• W2044725228 cites W2027692487 @default.
• W2044725228 cites W2030171735 @default.
• W2044725228 cites W2033408311 @default.
• W2044725228 cites W2035031922 @default.
• W2044725228 cites W2035473750 @default.
• W2044725228 cites W2039039175 @default.
• W2044725228 cites W2040550487 @default.
• W2044725228 cites W2041025533 @default.
• W2044725228 cites W2044188907 @default.
• W2044725228 cites W2044490939 @default.
• W2044725228 cites W2044921168 @default.
• W2044725228 cites W2045857800 @default.
• W2044725228 cites W2052011354 @default.
• W2044725228 cites W2052644995 @default.
• W2044725228 cites W2055356153 @default.
• W2044725228 cites W2056637161 @default.
• W2044725228 cites W2057902822 @default.
• W2044725228 cites W2061286155 @default.
• W2044725228 cites W2061972658 @default.
• W2044725228 cites W2064675727 @default.
• W2044725228 cites W2065388130 @default.
• W2044725228 cites W2066021947 @default.
• W2044725228 cites W2071672433 @default.
• W2044725228 cites W2072728343 @default.
• W2044725228 cites W2075959529 @default.
• W2044725228 cites W2076079139 @default.
• W2044725228 cites W2076576809 @default.
• W2044725228 cites W2080755349 @default.
• W2044725228 cites W2081069181 @default.
• W2044725228 cites W2083305191 @default.
• W2044725228 cites W2083823179 @default.
• W2044725228 cites W2084402833 @default.
• W2044725228 cites W2090446100 @default.
• W2044725228 cites W2090836067 @default.
• W2044725228 cites W2091983134 @default.
• W2044725228 cites W2093453353 @default.
• W2044725228 cites W2093845350 @default.
• W2044725228 cites W2094032026 @default.
• W2044725228 cites W2094101024 @default.
• W2044725228 cites W2094502562 @default.
• W2044725228 cites W2096961053 @default.
• W2044725228 cites W2098531001 @default.
• W2044725228 cites W2102166118 @default.
• W2044725228 cites W2102422895 @default.
• W2044725228 cites W2105636247 @default.
• W2044725228 cites W2124301221 @default.
• W2044725228 cites W2126309541 @default.
• W2044725228 cites W2128624170 @default.
• W2044725228 cites W2133986992 @default.
• W2044725228 cites W2134502130 @default.
• W2044725228 cites W2136509581 @default.

• next