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Mapping the distribution of melt during anatexis at the source area of crustal granites by synchrotron μ-XRF by Fabio Ferri; Antonio Acosta-Vigil; Carlos Alberto Perez; Nicolás Hayek is a Earth and Planetary Sciences article available to read on EtoBox.

What is Mapping the distribution of melt during anatexis at the source area of crustal granites by synchrotron μ-XRF about?

The garnet-biotite-sillimanite enclaves from El Hoyazo are quenched anatectic metapelites found within peraluminous dacites (Betic Cordillera, SE Spain), representing a residual lower crust in the area after 40-60% of melt extraction. Anatexis occurred concomitantly with deformation in a regional metamorphic setting during the Upper Miocene at the base of the continental crust. Previous studies have provided detailed information on the pressure-temperature evolution, the sequence of melting reactions, and associated melt proportions and compositions. They show that enclaves mostly record peak metamorphic assemblages, mineral compositions, and, likely, microstructures, with minor changes upon entrapment within the dacite magma and rapid ascent and extrusion. The enclaves still preserve a proportion of the primary melt, that solidified to glass in abundant melt inclusions (MI) and matrix melt, permitting the study of the microstructural relationships between melt and residue. This study focuses on the geometry of the glass network at the microscale that, combined with the previously reported anatectic history, helps shed light on the mechanisms and history of melt drainage from these

Who reads Mapping the distribution of melt during anatexis at the source area of crustal granites by synchrotron μ-XRF?

Author

Fabio Ferri; Antonio Acosta-Vigil; Carlos Alberto Perez; Nicolás Hayek

Publisher

Mineralogical Society of America

Published

2018

Language

EN

Field

Earth and Planetary Sciences (Physical Sciences)