Diffuse Soil Degassing in Hydrothermal Areas of Mt. Melbourne, Antarctica: Insights for the Understanding of Cryovolcanism on Earth
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Title
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Diffuse Soil Degassing in Hydrothermal Areas of Mt. Melbourne, Antarctica: Insights for the Understanding of Cryovolcanism on Earth
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Other Titles
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남극 멜버른 산(Mt. Melbourne) 지열 지역에서의 확산성 토양 탈가스: 지구에서의 크라이오화산 활동 이해를 위한 시사점
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Authors
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Lee, Hyunwoo
Lee, Wonhee
Lee, Mi Jung
Lee, Yongmoon
Park, Jonghoon
Cha, Hyerin
Naoto Takahata
Yuji Sano
Tobias P. Fischer
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Keywords
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Antarctica; Carbon Dioxide; Cryovolcanism; Helium; Hydrothermal Degassing; Mt. Melbourne
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Issue Date
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2025-07
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Citation
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Lee, Hyunwoo, et al. 2025. "Diffuse Soil Degassing in Hydrothermal Areas of Mt. Melbourne, Antarctica: Insights for the Understanding of Cryovolcanism on Earth". ACS Earth and Space Chemistry, 9(8): 2092-2101.
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Abstract
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Cryovolcanism is a phenomenon reported in dwarf planets and satellites in the solar system and is characterized by the eruptions of volatiles under low-temperature conditions. However, there are clearly limitations to understanding it fully from observations far from Earth. From this point of view, Antarctica is one of the most extreme environments on Earth and is a very important region for modeling the extraterrestrial environment. Here, we report a maximum soil CO2 flux value of 6120 g m?2 d?1 and a total CO2 output of 8355 t d?1 from the hydrothermal environment (up to 57.6 °C) of Mt. Melbourne, an active volcano located in Antarctica. In addition, fumarolic gases have δ13C values of ?13.9 to ?4.2‰ with CO2 concentrations of 21.2?36.2 vol %. The corrected helium isotope ratios (Rc/Ra) of the gases are up to 2.21, indicating the magma degassing of Mt. Melbourne. However, hydrogen and oxygen isotopes of the ice samples inside the ice caves and ice towers in the hydrothermal region, similar to their surroundings, suggest that they are of largely atmospheric origin. Nevertheless, the circulated water caused hydrothermal alteration, producing minerals such as kaolinite and gibbsite, which greatly affected the moss habitat and microbial distribution of small greenhouse systems. Thus, the observations in this Antarctic hydrothermal system could potentially provide clues about extraterrestrial biological activity through cryovolcanism.
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URI
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https://repository.kopri.re.kr/handle/201206/16581
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DOI
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https://doi.org/10.1021/acsearthspacechem.5c00099
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Type
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Article
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Station
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Jang Bogo Station
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Indexed
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SCIE
- Appears in Collections
- 2025-2025, 남극권 맨틀활동과 지체구조진화 연구 (25-25) / 박숭현 (PE25050)
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