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 ?
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.
Fluid-absent (dehydration) melting of biotite in metapelites in the early stages of crystal anatexis.
The pegmatitic origin of the main host to the Mont-Laurier mineralization resulted from anatexis of sandstone units during high-grade metamorphism.
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).
High mobility of melt during crustal anatexis becomes evident from the internal structure of leucosomes (Mengel et al.
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.
Arcs under extension have a steep geothermal gradient and underplating of the crust by mafic magma may transfer sufficient heat to induce anatexis.