Geoquímica de las rocas intrusivas sálicas del sur de la isla de Tenerife
- David Sanz-Mangas 1
- María José Huertas 1
- Eumenio Ancochea 1
- 1 Universidad Complutense de Madrid, España
ISSN: 0213-683X
Argitalpen urtea: 2017
Zenbakien izenburua: Comunicaciones presentadas en la LXII Sesión Científica / Guadalupe, 25 de Mayo de 2017
Zenbakia: 62
Orrialdeak: 79-82
Mota: Artikulua
Beste argitalpen batzuk: Geogaceta
Laburpena
In Roque del Conde Old Edifice at the south of Tenerife Island there are domatic structures called “roques” that are formed by intrusive salic rocks of acidic and intermediate compositions, and alkaline and strongly alkaline: trachyandesites, phonolites and trachytes. Some of the roques are compositionally homogeneous whereas others have a compositional variation in different zones. Trachyandesites follow a lineal pattern with the most basic rocks of Roque del Conde edifice and have been formed by a process of fractional crystallization. Trachytes and phonolites follow different patterns from the former. They are essentially controlled by fractional crystallization processes, where plagioclase and K-feldspars are the main removed phases. Accessory phases like Ti-magnetite, sphene and apatite, or amphibole have also an important role in these processes.