Estudios Geológicos, Vol 64, No 1 (2008)

Mezcla de magmas en Vulcanello (Isla Vulcano, Italia)


https://doi.org/10.3989/egeol.08641458

A. Aparicio
Departamento de Volcanología. Museo Nacional de Ciencias Naturales (CSIC). Madrid, España

G. Frazzetta
Istituto Nazionale de Geofisica e Volcanologia. Sezione di Catania (INGV-Catania). Catania, Italia

Resumen


La actividad volcánica de Isla Vulcano comienzó aproximadamente hace 350.000 años y continúa hasta la actualidad con el desarrollo de tres grandes episodios correspondientes a las caldera de Piano, caldera de Fossa y a Vulcanello, que han emitido piroclastos y coladas de composiciones muy variadas, desde riolitas a traquibasaltos. Esta variedad litológica ha sido relacionada con procesos petrogenéticos tan diversos como cristalización fraccionada, asimilación simultánea con cristalización (ACF), mezcla de magmas, etc.

El episodio de Vulcanello emite rocas traquiandesíticas, con composiciones shoshoníticas y latíticas. Un proceso de mezcla de magmas es reconocido entre traquitas y shoshonitas para generar latitas. Traquitas y riolitas son producidas por procesos de cristalización fraccionada simple y por ACF con asimilación de rocas sedimentarias a partir de magmas traquiandesíticos.

Palabras clave


Shosonitas; latitas; mezcla de magmas; Vulcano; Italia

Texto completo:


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Referencias


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