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http://dspace.mediu.edu.my:8181/xmlui/handle/10261/3034| Title: | Petrogénesis de los basaltos alcalinos de la Garrotxa, región volcánica del NE de España |
| Keywords: | Upper Mantle Mediterranean volcanism Leucite-basanites Nepheline-basanites Olivine basalts Partial melting Fractional crystallization |
| Publisher: | Sociedad Geológica de España |
| Description: | 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. Este trabajo forma parte del Proyecto de Investigación «El volcanismo del Neógeno-Cuaternario del Borde mediterráneo Ibérico: implicaciones sobre la naturaleza del Manto superior y tectónica asociada», subvencionado por la CAICYT Peer reviewed |
| URI: | http://dspace.mediu.edu.my:8181/xmlui/handle/10261/3034 |
| Other Identifiers: | Geogaceta, Nº1, 28-31 0213-683X http://hdl.handle.net/10261/3034 |
| Appears in Collections: | Digital Csic |
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