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

Details

Serval ID
serval:BIB_ADF59E7ABD00
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Geochemical and H-O-Sr-Nd isotope evidence for magmatic processes and meteoric-water interactions in the basal complex of La Gomera, Canary Islands
Journal
Mineralogy and Petrology
Author(s)
Demény A., Casillas R., Hegner E., Vennemann T.W., Nagy G., Sipos P.
ISSN-L
0930-0708
Publication state
Published
Issued date
2010
Peer-reviewed
Oui
Volume
98
Pages
181-195
Language
english
Abstract
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.
Create date
29/09/2012 16:22
Last modification date
20/08/2019 15:17
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