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Monitoring of magmatic?hydrothermal system by noble gas and carbon isotopic compositions of fumarolic gases
https://nied-repo.bosai.go.jp/records/2913
https://nied-repo.bosai.go.jp/records/2913c5e5cb5b-7920-476d-8359-b6d169ecb26e
| Item type | researchmap(1) | |||||||||||||||||||||
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| 公開日 | 2023-03-30 | |||||||||||||||||||||
| タイトル | ||||||||||||||||||||||
| 言語 | en | |||||||||||||||||||||
| タイトル | Monitoring of magmatic?hydrothermal system by noble gas and carbon isotopic compositions of fumarolic gases | |||||||||||||||||||||
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| 言語 | eng | |||||||||||||||||||||
| 著者 |
Tomoya Obase
× Tomoya Obase
× Hirochika Sumino
× Kotaro Toyama
× Kaori Kawana
× Kohei Yamane
× Muga Yaguchi
× Akihiko Terada
× Takeshi Ohba
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| 抄録 | ||||||||||||||||||||||
| 内容記述タイプ | Other | |||||||||||||||||||||
| 内容記述 | Abstract We repeatedly measured isotopic compositions of noble gases and CO<sub>2</sub> in volcanic gases sampled at six fumaroles around the Kusatsu-Shirane volcano (Japan) between 2014 and 2021 to detect variations reflecting recent volcanic activity. The synchronous increases in <sup>3</sup>He/<sup>4</sup>He at some fumaroles suggest an increase in magmatic gas supply since 2018. The increase in magmatic gas supply is also supported by the temporal variations in <sup>3</sup>He/CO<sub>2</sub> ratios and carbon isotopic ratios of CO<sub>2</sub>. The <sup>3</sup>He/<sup>40</sup>Ar* ratios (<sup>40</sup>Ar*: magmatic <sup>40</sup>Ar) show significant increases in the period of high <sup>3</sup>He/<sup>4</sup>He ratios. The temporal variation in <sup>3</sup>He/<sup>40</sup>Ar* ratios may reflect changes in magma vesicularity. Therefore, the <sup>3</sup>He/<sup>40</sup>Ar* ratio of fumarolic gases is a useful parameter to monitor the current state of degassing magma, which is essential for understanding the deep process of volcanic unrest and may contribute to identifying precursors of a future eruption.?These results provide additional validation for the use of noble gas and carbon isotopic compositions of fumarolic gases for monitoring magmatic?hydrothermal systems. |
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| 言語 | en | |||||||||||||||||||||
| 書誌情報 |
en : Scientific Reports 巻 12, 号 1, p. :17967, 発行日 2022-11-21 |
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| 出版者 | ||||||||||||||||||||||
| 言語 | en | |||||||||||||||||||||
| 出版者 | Springer Science and Business Media LLC | |||||||||||||||||||||
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| 収録物識別子タイプ | EISSN | |||||||||||||||||||||
| 収録物識別子 | 2045-2322 | |||||||||||||||||||||
| DOI | ||||||||||||||||||||||
| 関連識別子 | 10.1038/s41598-022-22280-3 | |||||||||||||||||||||
