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 ?
Metamorphism and anatexis during rapid exhumation of the Western Himalaya, Northern Pakistan.
Here we present a study of geochemistry, zircon U-Pb chronology and Hf isotopes on the Yamarong leucogranites from Tsona area, Eastern Himalaya, to explore the petrogenesis of the rocks, and to further expain related problems of continental crustal anatexis. The zircon U-Pb dating displayed two ages of magmatism, 14.4 Ma and 17 Ma respectively.
Posteriormente INGEOMINAS realizo la cartografia geologica a escala 1:100.000 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., 1998; Velandia et al, 1999; Velandia et al, 2001).
(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.
The presence of migmatites in the lower crustal level implies that the granitoid was formed by the lower crustal anatexis of the mafic rocks derived from BABB source.
(2011), proponen la anatexis del Complejo Iglesias como fuente principal del GC.
Tomkins, A.G., and Mavrogenes, J.A., 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. Contrib.