Seismic activity and an anomalous fumarolic chemical composition due to seal effect in the volcanic system of Deception Island (Antarctica)

In this communication, the genesis of great anomalous seismic activity registered during austral summer 2003/2004 on Deception Island (Antarctica) is discussed, and related with changes on the chemical composition of fumarolic gases and vent deposits. Here we present a comparative analysis performed...

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Bibliographic Details
Main Authors: Caselli, Alberto T., Bengoa, Cintia L., Agusto, Mariano Roberto
Language:unknown
Published: 2007
Subjects:
Online Access:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v62_n4_p545_Caselli
https://hdl.handle.net/20.500.12110/paper_00044822_v62_n4_p545_Caselli
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Summary:In this communication, the genesis of great anomalous seismic activity registered during austral summer 2003/2004 on Deception Island (Antarctica) is discussed, and related with changes on the chemical composition of fumarolic gases and vent deposits. Here we present a comparative analysis performed to explain this activity. We propose a possible parcial seal of the microfracture system. This effect allows an increase on pressure follow by reopening of microfractures, resulting on a sequence of seismic events and changes on the chemical composition of fumarolic emissions. Fil:Caselli, A.T. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Bengoa, C.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Agusto, M.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.