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Carbon dioxide and helium dissolved gases in groundwater at central Tenerife Island, Canary Islands: chemical and isotopic characterization
https://nied-repo.bosai.go.jp/records/4171
https://nied-repo.bosai.go.jp/records/41719fc794d0-dc49-4a14-b705-1181d6b50417
| 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 | Carbon dioxide and helium dissolved gases in groundwater at central Tenerife Island, Canary Islands: chemical and isotopic characterization | |||||||||||||||||||||||||||||
| 言語 | ||||||||||||||||||||||||||||||
| 言語 | eng | |||||||||||||||||||||||||||||
| 著者 |
Rayco Marrero-Diaz
× Rayco Marrero-Diaz
× Dina Lopez
× Nemesio M. Perez
× Emilio Custodio
× Hirochika Sumino
× Gladys V. Melian
× Eleazar Padron
× Pedro A. Hernandez
× David Calvo
× Jose Barrancos
× German Padilla
× Francesco Sortino
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| 抄録 | ||||||||||||||||||||||||||||||
| 内容記述タイプ | Other | |||||||||||||||||||||||||||||
| 内容記述 | Seismic-volcanic unrest was detected between 2004 and 2005 in the central and northwest zones of Tenerife Island (Canary Islands, Spain). With the aim of strengthening the program of geochemical and seismic-volcanic surveillance, a study of the origin, characteristics, and spatial distribution of dissolved carbon dioxide (CO2) and helium (He) gases in the volcanic aquifer of central Tenerife Island and around Teide volcano was carried out. This work also improves the hydrogeological and hydrogeochemical conceptual model of groundwater flow. Dissolved CO2 concentrations in sampled groundwater are several orders of magnitude higher than that of air-saturated water (ASW) suggesting a significant contribution of non-atmospheric CO2, mainly magmatic, confirmed through measurement of isotopic compositions (delta C-13(TDIC)) and total dissolved inorganic carbon (TDIC) concentrations. A vertical stratification of dissolved CO2 and delta C-13(TDIC) values was observed in the volcanic aquifer at the eastern region of Las Canadas Caldera. Stratification seems to be controlled by both degree of magmatic CO2-water interaction and CO2 degassing and the original delta C-13(co2(g)) isotopic composition. The highest dissolved helium (He-4) concentrations in groundwater seem to be related to radiogenic contributions resulting from water-rock interactions, and increase with residence time, instead of with endogenous magmatic inputs. Isotopic systematics show that the dissolved gases in groundwater of central Tenerife are variable mixtures of CO2-He-3-rich fluids of volcanic-hydrothermal origin with both organic and atmospheric components. The results suggest that the eastern area of Las Canadas Caldera, the South Volcanic Ridge, and the Teide summit cone are the areas most affected by degassing of the volcanic-hydrothermal system, and they are therefore the most suitable zones for future geochemical monitoring. | |||||||||||||||||||||||||||||
| 言語 | en | |||||||||||||||||||||||||||||
| 書誌情報 |
en : BULLETIN OF VOLCANOLOGY 巻 77, 号 10, p. 86 |
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| 言語 | en | |||||||||||||||||||||||||||||
| 出版者 | SPRINGER | |||||||||||||||||||||||||||||
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| 収録物識別子タイプ | EISSN | |||||||||||||||||||||||||||||
| 収録物識別子 | 1432-0819 | |||||||||||||||||||||||||||||
| DOI | ||||||||||||||||||||||||||||||
| 関連識別子 | 10.1007/s00445-015-0969-0 | |||||||||||||||||||||||||||||
