Volcanogenic CO<sub>2</sub> Degassing in the Songliao Continental Rift System, NE China

Zhao, Wenjin; Guo, Zhengfu; Lei, Ming; Zhang, Maoliang; Ma, Lin; Fortin, Danielle; Zheng, Guodong

doi:10.1155/2019/8053579

Cited by 6 publications

(2 citation statements)

References 66 publications

(117 reference statements)

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“…The regional variations in 3 He/ 4 He, δ 13 C of CO 2 , δ 15 N, and 87 Sr/ 86 Sr values of hydrothermal fluids along an intra-arc fault system in the southern Volcanic Zone of the Chilean Andes indicated the geothermal gas was a mixture of mantle-derived gas and radiogenic gas in the crust (Tardani et al, 2016). The molecular and isotopic data of hot spring fluids and fumarolic gases in the Tateyama volcanic hydrothermal system in Japan (Seki et al, 2019), the Tengchong volcanic area (Du et al, 2005) and western Sichuan Province (Du et al, 2006) in southwestern China, and the Wudalianchi volcanic field (Du et al, 1999;Xu et al, 2013), Changbaishan volcano (CBV) (Wei et al, 2016), and the Songliao continental rift system (Zhao et al, 2019) in NE China indicated the gases were predominantly derived from the mantle and crustal sources.…”

Section: Introductionmentioning

confidence: 99%

Contribution of deep-earth fluids to the geothermal system: A case study in the Arxan volcanic region, northeastern China

et al. 2023

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Investigations of the hot spring water and gas in the volcanic region are involved in assessing geothermal resources and understanding groundwater circulation, volcano, and earthquake activities. The origins of water and gas of the hot springs, lakes, rivers, and rain in the Arxan volcanic region (AVR), northeastern (NE) China, were investigated by conducting a field survey and geochemical analysis. The low electrical conductivity (40–835 μS/cm) and low total dissolved solids (TDS, 23.83–540.00 mg/L) of the water samples indicate that they are fresh water. δ18O and δD values of the water samples range from −4.1% to −16.0% and from −61.3% to −119.9%, respectively. Enrichment of heavy isotopes in the rainwater and the crater lake waters was caused by evaporation. The component H2O of the water samples predominantly originated from the meteoric water, with less than 1 vol% contributed by deep-earth fluids. Ions in the rain sample were predominantly derived from sea salt and continental aerosol. Ions in the surface water samples had multiple origins (mineral dissolution, atmospheric, and anthropogenic sources). While the ions in the hot spring water were predominantly derived from both the dissolution of rocks and deep-earth fluids, the latter contributed 73%–87% of Cl− and 86%–99% of Na+ to the hot spring waters. Gases from the hot springs were composed of more than 95% N2 and less than 5% O2 and Ar, with 3He/4He ratios of 0.14–1.17 RA (RA=1.4×10−6). Excess N2, Ar, He, and CO2 of the hot springs were mainly derived from both the crust and upper mantle. About 3%–23% of the total He in the bubbling gases from the crater lake waters and hot springs is derived from the mantle, implying a supplement of heat energy from the mantle to the geothermal systems. Significantly, about 12% of the He dissolved in the Budonghe water is derived from the mantle, indicating that plenty of mantle-derived heat transported by deep-earth fluids keeps the river water from freezing. Our results indicate that Cl and Na ions and 3He/4He ratio are the feasible geochemical indicators for source partitioning of geothermal fluids.

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Section: Introductionmentioning

confidence: 99%

Contribution of deep-earth fluids to the geothermal system: A case study in the Arxan volcanic region, northeastern China

et al. 2023

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“…It has been demonstrated that 14 volcanoes in mainland China erupted during the Holocene (wei et al, 1998;Wei et al, 2003;Pan et al, 2021) and are currently in a dormant state. Among the current dormant volcanoes in China, the Changbaishan, Tengchong, and Wudalianchi volcanoes have been investigated by numerous studies to determine their fluid backgrounds (Du et al, 1999;Shangguan et al, 2008;Zhang et al, 2011;2018 ;Liu et al, 2011;Guo et al, 2015;Li, 2015;Zhao, 2012;Wei et al, 2021;Zhao et al, 2019). Some studies on the geothermal fluids in the Arxan volcano have been conducted, but studies focusing on the volcanic greenhouse gas emissions in this area are scarce.…”

Section: Introductionmentioning

confidence: 99%

Investigation of hot spring gas components and soil gas fluxes in Arxan Holocene volcanic field, Inner Mongolia, NE China

Pan,

Gu,

Han

et al. 2023

Front. Earth Sci.

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The latest research results show that there is a unified magma system and heating channel beneath the Arxan volcanic field, indicating a potential risk of eruption. The Arxan volcanic field features multiple gas emission sites (e.g., Jinjianggou hot springs and Yinjianggou hot springs) and exhibits strong hydrothermal activity. In this study, measurements of the hot spring gas composition and soil CO2 flux in the Arxan Holocene volcanic field were conducted, and the results were combined with previous research results to analyze the degassing characteristics of this region. The results show that the volcanic gases in the Arxan volcanic field are composed of 0.07%–1.09% CO2, 0.33–12 ppm CH4, 1.57–53 ppm H2, 800–30,241 ppm He, and 1.14%–1.86% Ar. The He content in this area is notably higher than that in other dormant volcanoes in China. This difference is possibly caused by U–Th decay in the Mesozoic granodiorite and acidic volcanic rocks in the study area, which can produce substantial radiogenic He. The soil gas concentrations near the Jinjianggou and Yinjianggou hot springs are higher than those of two Holocene volcanoes. The peak CO2 concentration in the soil near the Jinjianggou hot spring can reach 35,161 ppm. The single-site soil microseepage CO2 flux in the Arxan volcanic field is 4.66–107.18 g m−2 d−1, and the estimated annual CO2 emission flux from the volcanic field to the atmosphere is 0.63 × 105 t, which also demonstrates that soil CO2 flux of Arxan volcano is comparable to the soil CO2 emission level of the Iwojima volcano.

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Higher diversity of sulfur-oxidizing bacteria based on soxB gene sequencing in surface water than in spring in Wudalianchi volcanic group, NE China

Geng,

Yang,

Liu

et al. 2024

Int Microbiol

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Volcanogenic CO₂ Degassing in the Songliao Continental Rift System, NE China

Cited by 6 publications

References 66 publications

Contribution of deep-earth fluids to the geothermal system: A case study in the Arxan volcanic region, northeastern China

Contribution of deep-earth fluids to the geothermal system: A case study in the Arxan volcanic region, northeastern China

Investigation of hot spring gas components and soil gas fluxes in Arxan Holocene volcanic field, Inner Mongolia, NE China

Higher diversity of sulfur-oxidizing bacteria based on soxB gene sequencing in surface water than in spring in Wudalianchi volcanic group, NE China

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Volcanogenic CO2 Degassing in the Songliao Continental Rift System, NE China

Cited by 6 publications

References 66 publications

Contribution of deep-earth fluids to the geothermal system: A case study in the Arxan volcanic region, northeastern China

Contribution of deep-earth fluids to the geothermal system: A case study in the Arxan volcanic region, northeastern China

Investigation of hot spring gas components and soil gas fluxes in Arxan Holocene volcanic field, Inner Mongolia, NE China

Higher diversity of sulfur-oxidizing bacteria based on soxB gene sequencing in surface water than in spring in Wudalianchi volcanic group, NE China

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Volcanogenic CO₂ Degassing in the Songliao Continental Rift System, NE China