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Le magmatisme basique hercynien et post-hercynien du Système central espagnol : essai de caractérisation des sources mantelliques |
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| Authors: | Carlos Villaseca David Orejana Christian Pin José-Angel López Garcı́a Pilar Andonaegui |
| Institution: | 1. Departamento de Petrolog??a y Geoqu??mica, Facultad Geolog??a, UCM, 28040 Madrid, Espagne;2. CNRS UMR 6524, département de géologie, université Blaise-Pascal, 63038 Clermont-Ferrand, France;3. Departamento de Cristalograf??a y Mineralog??a, Facultad Geolog??a, UCM, 28040 Madrid, Espagne |
| Abstract: | Basic magmatism in central Spain occurred sporadically during a long period of ca. 140 Ma. The geochemical data on representative samples from the five igneous episodes show that different mantle reservoirs were tapped. Crustal involvement (via recycling in mantle sources or by hybridization at emplacement levels) was important in the basic magmas related to the Hercynian orogeny (Gb1 to Gb3 suites). Samples occurring as later dykes have signatures ranging from OIB-like values (Gb4 alkaline lamprophyres) to those of a formerly enriched subcontinental lithospheric mantle (tholeiites Gb5). To cite this article: C. Villaseca et al., C. R. Geoscience 336 (2004). |
| Keywords: | roches basiques manteau sous-continental géochimie isotopes du Sr et Nd Système central espagnol basic rocks subcontinental mantle geochemistry (Sr Nd) isotopes Spanish Central System |
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