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Title: | Petrogénesis de los basaltos alcalinos de la Garrotxa, región volcánica del NE de España |
Authors: | López Ruiz, J. CSIC; Rodríguez Badiola, Eduardo CSIC; Cebriá Gómez, J. M. CSIC | Keywords: | Upper Mantle Mediterranean volcanism Leucite-basanites Nepheline-basanites Olivine basalts Partial melting Fractional crystallization |
Issue Date: | Dec-1986 | Publisher: | Sociedad Geológica de España | Citation: | Geogaceta, Nº1, 28-31 | Abstract: | Compositional trends and trace elements abundance in leucite-basanites, nepheline-basanites and olivíne basalts from la Garrotxa (NE Spain region), suggest that the parental magma were originated from an homogeneous lherzolite source, strongly enriched in incompatible elements (between x15-x4 the chondritic values for the highly incompatible elements and between x5-x2 for the moderately incompatible), in which neither kaersutite, phlogopite or apatite remained as residual phases. The leucite-basanite magmas were derived by lower degrees of melting (7-10%) than the basanite s,s. and the olivine basalt magmas (13-15%). Except some primary leucite-basanites, the lavas from La Garrotxa underwent a moderate fractionation (~20%) of ol + cpx + mg, in proportion that range between 75-40%, 55-10% and 15-0 %, respectively. | URI: | http://hdl.handle.net/10261/3034 | ISSN: | 0213-683X |
Appears in Collections: | (MNCN) Artículos |
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Petrogénesis Basaltos NE de España.pdf | 6,99 MB | Adobe PDF | ![]() View/Open |
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