Características composicionales y procesos de evolución magmática en el complejo volcánico sur-III de Fuerteventura (Islas Canarias)
- F. Hernán 1
- C.R. Cubas 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 Geoqufmica. Universidad Complutense - lnst. Geologfa Económica. C.S.I.C. Fac. C. Geológicas. Madrid
ISSN: 0213-683X
Año de publicación: 1996
Número: 20
Páginas: 550-553
Tipo: Artículo
Otras publicaciones en: Geogaceta
Resumen
The Southern Volcanic Complex 111 is formed by basalts, a lesser amount of trachybasa/ts and some scarce trachytes, ali of them mildly alkaline. Crystal fractionation was in an early stage, controled by crystallisation and extraction of olivine (60%) and clinopyroxene (40%). The crystallisation path is, then, ru/ed by dominant clynopyroxene and lesser proportions of plagioclase and Ti-magnetite. Later extraction of plagioclase and clinopyroxene and some other differenLation processes, cou/d account far the presence of trachytes. The Angostura Formation representing the most recent activity within the entire Southern Volcanic Complex, consists of strongly alkaline and u/traa/kaline rocl<s. These rocks are scarcely differentiated, though certain fractionation tendences dominated by olivine extraction are observed.