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U-Pb isotopic ages and Hf isotope composition of zircons in Variscan gabbros from central Spain: evidence of variable crustal contamination

Villaseca, Carlos; Orejana, David; Belousova, Elena; Armstrong, Richard; Perez-Soba, Cecilia; Jeffries, Teresa E.

Description

Ion microprobe U-Pb analyses of zircons from three gabbroic intrusions from the Spanish Central System (SCS) (Talavera, La Solanilla and Navahermosa) yield Variscan ages (300 to 305 Ma) in agreement with recent studies. Only two zircon crystals from La Solanilla massif gave slightly discordant Paleoproterozoic ages (1,848 and 2,010 Ma). Hf isotope data show a relatively large variation with the juvenile end-members showing e{open}Hfi values as high as +3.6 to +6.9 and +1.5 to +2.9 in the...[Show more]

CollectionsANU Research Publications
Date published: 2010
Type: Journal article
URI: http://hdl.handle.net/1885/59304
Source: Mineralogy and Petrology
DOI: 10.1007/s00710-010-0142-6

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