Eruptive Activity from Lascar Volcano ( 2003-2005).

AGUILERA F., MEDINA, E., VIRAMONTE, J., GUZMÁN, K., BECCHIO, R., DELGADO, H., ARNOSIO, M.

Antofagasta, Chile

Congreso; X Congreso Geológico Chileno; 2006

Universidad Católica del Norte

1. INTRODUCTION Lascar Volcano has been a constant study case due an its very high activity, reflected by its high eruptive rate (2.5 and 0.8 eruptions/year considering eruptive plumes higher than 5,000 and 1,000 m above crater, respectively). Diverse efforts have been made it to understand its eruptive behaviour, being only a very short eruptive period related to growth–and–collapse dome between 1986–1994 characterized (Matthews et al., 1997). However, the eruptive behaviour before and after of this period is not clear. Is considered that the understanding of process that trigger the eruptions can help to determine the eruptive behaviour of a particular volcano, therefore, in this work are presented field, satellite, air fall deposits and gas data from 2003–2005 eruptive period, with the objective to characterize this eruptive period and to determine the process that have triggered the eruptions. after of this period is not clear. Is considered that the understanding of process that trigger the eruptions can help to determine the eruptive behaviour of a particular volcano, therefore, in this work are presented field, satellite, air fall deposits and gas data from 2003–2005 eruptive period, with the objective to characterize this eruptive period and to determine the process that have triggered the eruptions. et al., 1997). However, the eruptive behaviour before and after of this period is not clear. Is considered that the understanding of process that trigger the eruptions can help to determine the eruptive behaviour of a particular volcano, therefore, in this work are presented field, satellite, air fall deposits and gas data from 2003–2005 eruptive period, with the objective to characterize this eruptive period and to determine the process that have triggered the eruptions.