anatexis


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anatexis

(ˈænəˌtɛksɪs)
n
geology the partial melting of rocks, esp in the formation of metamorphic rocks
[C20: from Greek: rebirth]
References in periodicals archive ?
000 de esta region, con enfasis en informacion macroscopica y petrografica, separando del Batolito de Ibague (Pluton del Paez), las rocas metamorficas que fueron llamadas Ortogranito de La Plata, descritas como granitos de anatexis y migmatitas de probable edad Precambrica (Rodriguez, 1995b; Rodriguez et al.
2006) conclude that the following mechanisms, operating alone, are able to induce anatexis in typical pelitic rocks: 1) Magmatic advection by pervasive flow, 2) Crustal-scale detachment faulting, and 3) The presence of a high-heat producing layer.
2002, Mobilization of gold as a polymetallic melt during petite anatexis at the Challenger Deposit, South Australia: A metamorphosed Archean gold deposit: Economic Geology, v.
Isotope analyses suggest that domes ascending from anatexis zones within the lower crust and the upper mantle exerted strong thermal and structural influence; however, ore deposition occurred at the subvolcanic level and at shallow depth.
Both sites are placed in the Krkonose-Jizera granitic Massif and its high-metamorphic rock-coat roots which due to the anatexis origin of the Massif may reach deep parts of the lower lithosphere.
Fluid-absent (dehydration) melting of biotite in metapelites in the early stages of crystal anatexis.
According to the definition given by Brown (1973), diatexis is considered to be the process of high-grade anatexis in which fusion may be complete.
The pegmatitic origin of the main host to the Mont-Laurier mineralization resulted from anatexis of sandstone units during high-grade metamorphism.
Procesos de anatexis pudieron haber acompanado el desarrollo de isogradas de alto grado (zona de la sillimanita), mientras que la fusion parcial de estas rocas metamorficas pudo ocurrir a temperaturas de aproximadamente 650[grados]C, en presencia de agua (trayectoria en color verde, FIGURA 15).
1994) proposed that the Nagar Parkar granite rocks are the product of crustal anatexis in an intraplate (continental) anorogenic environment.