anatexis

[‚an·ə′tek·səs]

(geology)

A high-temperature process of metamorphosis by which plutonic rock in the lowest levels of the crust is melted and regenerated as a magma.

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(2001), asignan el nombre de Ortogranito de La Plata a las rocas metamorficas anteriormente nombradas Macizo de La Plata y define un area de exposicion de 50 [Km.sup.2] hacia el occidente del municipio de La Plata, constituida por granitoides cuarzo feldespaticos formados por ultra metamorfismo (anatexis), localmente con granulitas y migmatitas.

Caracterizacion petrografica, geoquimica y geocronologia de rocas granitoides permicas al occidente de La Plata y Pacarni--Huila, Valle Superior del Magdalena--Colombia

(2006): Controls on low-pressure anatexis. Journal of Metamorphic Geology 24, 107-118.

The Sierra de Cachi (Salta, NW Argentina): geological evidence about a Famatinian retro-arc at mid crustal levels

(3) The IAB magmatism led to the lower crustal anatexis of the OIA basement, consequently generating granitoids of arc affinities (ca.

Crustal evolution of a paleozoic intra-oceanic island-arc-back-arc basin system constrained by the geochemistry and geochronology of the Yakuno ophiolite, Southwest Japan

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.

Geochemical constraints of origin and evolution of migmatites in the central part of the Moldanubian Zone (Temelin area), Bohemian Massif

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).

Estudio petrogenetico de las rocas metamorficas del macizo de Floresta, Cordillera Oriental, Andes Colombianos

Anatexis of mafic crust and high pressure crystallization of andesite.

Investigation for gold and base metals mineralization and petrochemical characteristics of the rocks of upper parts of Bagrot valley Gilgit-Baltistan Pakistan

High mobility of melt during crustal anatexis becomes evident from the internal structure of leucosomes (Mengel et al.

An analogue model of melt segregation and accumulation processes in the Earth's crust/Maakoore osalise ulessulamise protsesside modelleerimine analoogmaterjalide abil

Those formed by anatexis of older crust should have depleted mantle model ages that are significantly older than their crystallization age and those that reflect contamination or assimilation should plot on calculated mixing curves and should have a range in TDM ages between the end member components (DePaolo 1981a, b; Arndt and Goldstein 1987).

Igneous rock associations 8. Arc magmatism II: geochemical and isotopic characteristics

The igneous rocks are interpreted to be the product of crustal anatexis (Pankhurst and Rapela, 1995) which took place during widespread extensional events preceding the dismembering of the Pangea supercontinent and, thus, the opening of the Atlantic Ocean.

Condiciones P-T de metamorfismo de riolitas del Jurasico Superior en el cinturon de pliegues y mantos de Magallanes, Andes Patagonicos, Chile

A model for emplacement of the batholith assumes crustal anatexis above mantle-derived, underplated mafic magma, followed by passive emplacement of composite magma along tensional fractures related to movements on the Dog Bay Line, a dextral terrane boundary.

Emplacement of the Fogo Island Batholith, Newfoundland

Some of the pegmatites are probably the result of anatexis of the basement rocks, formed by metamorphic secretion, diffusion and replacement (Haughton, 1969).

Jeremejevite from Namibia

(1994) proposed that the Nagar Parkar granite rocks are the product of crustal anatexis in an intraplate (continental) anorogenic environment.

An appraisal of uranium source potential of granites, associated felsic rocks, kaolin and calcretes of Nagar Parkar area, Tharparkar Pakistan