Partial crustal melting beneath the Betic Cordillera (SE Spain): The case study of Mar Menor volcanic suite

The Neogene Volcanic Province (NVP) within the Betic Cordillera (SE Spain) consists of three main metapelitic enclave suites (from SW to NE: El Hoyazo, Mazarrón and Mar Menor). Since the NVP represents a singular place in the world where crustal enclaves were immediately quenched after melting, their microstructures provide a “photograph” of the conditions at depth just after the moment of the melting. The thermobarometric information provided by the different microstructural assemblages has been integrated with the geophysical and geodynamical published data into a model of the petrologic evolution of the Mar Menor enclaves. They were equilibrated at 2–3 kbar, 850–900 °C, and followed a sequence of heating melt producing reactions. A local cooling event evidenced by minor melt crystallization preceded the eruption. The lower crustal studies presented in this work contribute to the knowledge of: (i) the partial melting event beneath the Mar Menor volcanic suite through a petrologic detailed study of the enclaves; (ii) how the microstructures of fast cooled anatectic rocks play an important role in tracing the magma evolution in a chamber up to the eruption, and how they can be used as pseudothermobarometers; (iii) the past and current evolution of the Alborán Domain (Betic Cordillera) and Mediterranean Sea, and how the base of a metapelitic crust has melted within an active geodynamic setting. © 2007 Elsevier B.V. All rights reserved.

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Álvarez Valero A.M. y Kriegsman L.M. Partial crustal melting beneath the Betic Cordillera (SE Spain): The case study of Mar Menor volcanic suite. Elsevier B.V., 2007. https://doi.org/10.1016/j.lithos.2007.08.016

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Fecha de creación 05-11-2024
Fecha de última modificación 19-01-2025
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Identificador de los metadatos d3716767-3689-5100-b53e-6b8b19cf51bc
Idioma de los metadatos Español
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Categoría del conjunto de alto valor (HVD) Observación de la Tierra y medio ambiente
Categoría temática ISO 19115 biota
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Nombre del autor Álvarez Valero, A.M. y Kriegsman, L.M.
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Identificador alternativo DOI: 10.1016/j.lithos.2007.08.016
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