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handle: 10261/252969
Se investigó la gran erupción del Complejo Volcánico de Cerro Blanco (CVCB), en la Zona Volcánica Central de los Andes, NO Argentina, datada en 4410¿4150 a cal AP, confirmando que es uno de los principales eventos eruptivos del Holoceno en el mundo (Fernández-Turiel et al., 2019). Los resultados evidencian una erupción explosiva riolítica con depósitos piroclásticos de caída cineríticos a más de 400 km de distancia, cubriendo un área de aproximadamente 500,000 km2 con un volumen >100 km3 (volumen total bruto, equivalente a unos 70 km3 de volumen DRE). Este último valor excede el umbral inferior del Índice de Explosión Volcánica (VEI) de 7. Asimismo, los depósitos de flujos piroclásticos inundaron los valles vecinos alcanzando distancias de varias decenas de kilómetros.
The major eruption of the Cerro Blanco Volcanic Complex (CBVC), in the Central Volcanic Zone of the Andes, NW Argentina, dated at 4410–4150 a cal BP, was investigated confirming that is one the major Holocene eruptive events in the world (Fernandez-Turiel et al., 2019). Results provide evidence for a major rhyolitic explosive eruption that spread ash-fall deposits at distances > 400 km, mantled the region over an area of about 500,000 km2 and accumulating >100 km3 of tephra (bulk volume, equivalent to about 70 km3 DRE). This last value exceeds the lower threshold of Volcanic Explosive Index (VEI) of 7. On the other hand, thick pyroclastic-flow deposits (ignimbrites) filled neighbouring valleys up to several tens of kilometres from the vent
Esta investigación fue financiada por los Proyectos ASH y QUECA (MINECO, CGL2008-00099 y GL2011-23307). Agradecemos el apoyo analítico del Laboratorio de Geoquímica labGEOTOP (infraestructura cofinanciada por ERDF-EU Ref. CSIC08-4E-001) y del Laboratorio de DRX (infraestructura cofinanciada por ERDF-EU Ref. CSIC10-4E¿141) de ICTJA-CSIC, y los laboratorios de EPMA y SEM de CCiTUB. Este estudio se realizó en el marco de los Grupos Consolidados de Investigación GEOVOL (Gobierno de Canarias) y GEOPAM (Generalitat de Catalunya, 2017SGR 1494).
X Congreso Geológico de España, 5-7 Julio 2021, Vitoria - Gasteiz
Riolita, Argentina, Holoceno, Andes, Complejo Volcánico de Cerro Blanco
Riolita, Argentina, Holoceno, Andes, Complejo Volcánico de Cerro Blanco
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