The continental crust has differentiated throughout geologic time, and crustal anatexis (i.e. partial melting of the crust), accompanied by melt. Jump to Optimum temperature conditions for crustal melting - Anatexis in geology, refers to the differential, or partial, melting of rocks, especially in the General overview · Examples of anatexis · "The Granite Problem. Anatexis: Anatexis, in geology, the differential, or partial, melting of rocks. rock of the Earth's crust, forming by the cooling of magma (silicate melt) at depth.
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Advanced Search Abstract Detailed mapping of Hercynian basement rocks exposed in crustal anatexis Trois Seigneurs Massif, Pyrenees, France, has demonstrated a continuous metamorphic sequence developed in Palaeozoic pelitic sediments, ranging from chlorite-grade phyllites, through andalusite and sillimanite mica schists to a zone of migmatites and ultimately a heterogeneous, peraluminous, biotite- and cordiente-bearing granitoid ranging in composition from biotite granite to quartz diorite at the crustal anatexis tectonic levels exposed.
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You could not be signed in. Crustal anatexis a consequence, we still have a limited understanding of the nature of crustal differentiation associated with the geodynamic settings where crustal granitic magmas are produced, including the ratio of crustal growth to crustal reworking.
Magmas undoubtedly originate in the deep continental crust, but the nature of their source areas has not been established.