Isotopic evidences for phenocryst-matrix disequilibrium in the interaction between crustal and subcrustal magmas

Abstract

Partial melting of crustal rocks can generate granitic melts with different characteristics; isotopic systematics can be used to decipher the origin of these magmas. Time-scale for melting and crystallizzation in basalt-induced crustal melting are very short and isotopic disequilibrium between phenocrysts and matrix in silicic magmas and in mafic inclusions can be maintained.

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