Características composicionales y procesos de evolución magmática en el complejo volcánico Sur - II de Fuerteventura (Islas Canarias).
- C.R. Cubas 1
- F. Hernán 1
- E. Ancochea 2
- J.L. Brandle 2
- M.J. Huertas 2
- 1 Dpto. Edafología y Geología. Universidad de La Laguna. Tenerife.
- 2 Dpto. Petrología y Geoquímica. Universidad Complutense- lnst. Geología Económica. C.S.I.C. Fac. C. Geológicas. Madrid.
ISSN: 0213-683X
Año de publicación: 1996
Número: 20
Páginas: 546-549
Tipo: Artículo
Otras publicaciones en: Geogaceta
Resumen
The Southern Volcanic Complex II consists mainly o( basalts wilh some lrachybasalls and basa/tic trachyandesites. Its lower sequence is formed by middle a/kaline rocks whilsl in lhe upper one only mildly all ali Hy+OI -normative rocks are found. The variations in composilion are largely expfainec/ by similar C1ystal fractionation mode/s far both the lower and the upper sequence5. The varialion among different basa/tic types is due to different extraction rales of about 10-15¾, olivine being lhe dominanl phase, followed, in a lesser proportion, by clinopyroxene. The differencc bclwccn thc most diffcrcntialcc/ basalts and trachybasa/ts or basa/tic trachyandesiles could be explainec/ by exlraction o( clominanl clinopyroxene wilh pfagioc/ase and Fe-Ti oxides.