Caracterización geoquímica del complejo lóbulo-hialoclastítico submarino de la Caldera de Taburiente (La Palma, Islas Canarias)
- J. De la Nuez 1
- R. Casillas 1
- M.L. Quesada 1
- C. Fernández 2
- J.R. Colmenero 3
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1
Universidad de La Laguna
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2
Universidad de Huelva
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3
Universidad de Salamanca
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ISSN: 1576-5172
Any de publicació: 2016
Títol de l'exemplar: IX CONGRESO GEOLÓGICO DE ESPAÑA
Número: 16
Pàgines: 407-410
Tipus: Article
Altres publicacions en: Geotemas (Madrid)
Resum
A geochemical characterization of felsic submarine rocks of the La Palma island has been carried out. These felsic rocks are forming a lobe-hyaloclastite complex in the Caldera de Taburiente and they are classified as trachytes, although due to their hydrothermal alteration they should be considered as metatrachytes. By the incompatible trace element behaviour the variety of these trachytic rocks (porphyritic or aphanitic terms) could be explained as a crystal fractionation process. On the other hand, the incompatible trace element and rare earth features indicate that these trachytes are not cogenetic with the submarine basaltic and trachybasaltic rocks of the Basal Complex of La Palma, but the trachytic magma responsible of the lobe-hyaloclastite complex formation would have been resulted in the late evolution of a basaltic magma whose edifice does not currently crop out.