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  1. 防災科研関係論文

A magmatic source for fumaroles and diffuse degassing from the summit crater of Teide Volcano (Tenerife, Canary Islands): a geochemical evidence for the 2004-2005 seismic-volcanic crisis

https://nied-repo.bosai.go.jp/records/4161
https://nied-repo.bosai.go.jp/records/4161
934a8c92-8621-4618-8477-88a1131c0ca2
Item type researchmap(1)
公開日 2023-03-30
タイトル
言語 en
タイトル A magmatic source for fumaroles and diffuse degassing from the summit crater of Teide Volcano (Tenerife, Canary Islands): a geochemical evidence for the 2004-2005 seismic-volcanic crisis
言語
言語 eng
著者 G. Melian

× G. Melian

en G. Melian

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F. Tassi

× F. Tassi

en F. Tassi

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N. Perez

× N. Perez

en N. Perez

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P. Hernandez

× P. Hernandez

en P. Hernandez

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F. Sortino

× F. Sortino

en F. Sortino

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O. Vaselli

× O. Vaselli

en O. Vaselli

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E. Padron

× E. Padron

en E. Padron

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D. Nolasco

× D. Nolasco

en D. Nolasco

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J. Barrancos

× J. Barrancos

en J. Barrancos

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G. Padilla

× G. Padilla

en G. Padilla

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F. Rodriguez

× F. Rodriguez

en F. Rodriguez

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S. Dionis

× S. Dionis

en S. Dionis

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D. Calvo

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en D. Calvo

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K. Notsu

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en K. Notsu

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H. Sumino

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en H. Sumino

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抄録
内容記述タイプ Other
内容記述 The present work reports the results of 15 studies of diffuse CO2 degassing performed at Teide Volcano crater (Canary Island, Spain) and the chemical and isotopic compositions of fluids discharged from a fumarolic field located at the top of the volcano as measured between 1991 and 2010. A higher contribution of magmatic gases accompanied by enhanced total diffuse CO2 emissions were observed in relation with a seismic crisis that occurred in Tenerife Island between 2001 and 2005, with the main peak of seismic activity between April and June 2004. A significant pulse in total diffuse CO2 emission was observed at the crater of Teide (up to 26.3 t day(-1)) in 2001. In December 2003, the chemical composition of the Teide fumarole changed significantly, including the appearance of SO2, an increase in the HCl and CO concentrations and in the C2H6/C2H4 and C3H8/C3H6 ratios, and a decrease in the H2S, CH4, and C6H6 concentrations and in the gas/steam ratio. A few months after a drastic decrease in seismic activity, the SO2, HCl, and CO concentrations and the C2H6/C2H4 and C3H8/C3H6 ratios strongly decreased, whereas the CH4 and C6H6 concentrations and the gas/steam ratios increased. According to the trends shown by both the geochemical parameters and the seismic signals late in the observation period, the risk of a rejuvenation of volcanic activity at Teide is considered to be low. The associated temporal changes in seismic activity and magmatic degassing indicate that geophysical and fluid geochemistry signals in this system are related. Future monitoring programs aimed at mitigating volcanic hazard on Tenerife Island should involve coupled geophysical and geochemical studies.
言語 en
書誌情報 en : BULLETIN OF VOLCANOLOGY

巻 74, 号 6, p. 1465-1483
出版者
言語 en
出版者 SPRINGER
ISSN
収録物識別子タイプ ISSN
収録物識別子 0258-8900
DOI
関連識別子 10.1007/s00445-012-0613-1
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