(2006): Controls on low-pressure
anatexis. Journal of Metamorphic Geology 24, 107-118.
(3) The IAB magmatism led to the lower crustal
anatexis of the OIA basement, consequently generating granitoids of arc affinities (ca.
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.
Anatexis of mafic crust and high pressure crystallization of andesite.
High mobility of melt during crustal
anatexis becomes evident from the internal structure of leucosomes (Mengel et al.
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).
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.
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.
Some of the pegmatites are probably the result of
anatexis of the basement rocks, formed by metamorphic secretion, diffusion and replacement (Haughton, 1969).
(1994) proposed that the Nagar Parkar granite rocks are the product of crustal
anatexis in an intraplate (continental) anorogenic environment.