Mesozoic and Cenozoic Magmatism in the Betics

• Autores: María Teresa Gómez Pugnaire, Vicente López Sánchez-Vizcaíno, Juan Manuel Fernández Soler, Antonio Acosta Vigil
• Localización: The Geology of Iberia. A Geodynamic Approach.: Volume 3: The Alpine Cycle / coord. por Cecilio Quesada Ochoa, José Tomás de Oliveira, 2019, ISBN 978-3-030-11294-3, págs. 545-566
• Idioma: inglés
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• Resumen

  • Metamorphosed mafic igneous rocks (blueschists and eclogites) of the Nevado-Filábride Complex mainly occur as subparallel, multiple-injection dikes crosscutting shallow marine, Permo-Triassic metasediments or, locally, metaperidotites (rodingites). Radiometric data yields magmatic ages for zircons at around 185 ± 3 Ma. Chemical data indicate an E-MORB affinity of the melt. A continental or oceanic-continental transition setting is proposed for this magmatism. On the other hand, the volcanic region of SE Spain developed from 15 to 2.8 Ma producing four main groups of rocks: crustal contaminated, mantle derived, calc-alcaline andesitic to rhyolitic series; peraluminous volcanic rocks formed by anatectic processes of crustal sources; small ultrapotassic (lamproite) volcanic centres and intraplate alkaline basalts and basanites. Most models have explained this volcanism in relation to subduction processes.