Geochemical and H-O-Sr-Nd isotope evidence for magmatic processes and meteoric-water interactions in the basal complex of La Gomera, Canary Islands

Détails

ID Serval
serval:BIB_ADF59E7ABD00
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Geochemical and H-O-Sr-Nd isotope evidence for magmatic processes and meteoric-water interactions in the basal complex of La Gomera, Canary Islands
Périodique
Mineralogy and Petrology
Auteur(s)
Demény A., Casillas R., Hegner E., Vennemann T.W., Nagy G., Sipos P.
ISSN-L
0930-0708
Statut éditorial
Publié
Date de publication
2010
Peer-reviewed
Oui
Volume
98
Pages
181-195
Langue
anglais
Résumé
The plutonic rocks of the Basal Complex of La Gomera, Canary Islands,
Spain, were studied by means of major and trace element contents and by
H-O-Sr-Nd isotope compositions in order to distinguish primary magmatic
characteristics and late-stage alteration products. Deciphering the
effects of alteration allowed us to determine primary, plume-related
compositions that indicated D- and (18)O-depletion relative to normal
upper mantle, supporting the conclusions of earlier studies on the
plutonic rocks of Fuerteventura and La Palma. Late-stage alteration took
place during the formation of the intrusive series induced by
interaction with meteoric water. Inferred isotopic compositions of the
meteoric water indicate that the water infiltrated into the rock edifice
at a height of about 1500 m above sea level, suggesting the existence of
a subaerial volcano which was active during the intrusive activity and
that it has been either distroyed or remain buried by later volcanic and
landslide events.
Création de la notice
29/09/2012 16:22
Dernière modification de la notice
20/08/2019 15:17
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