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EARTHQUAKE ›› 2024, Vol. 44 ›› Issue (3): 196-214.doi: 10.12196/j.issn.1000-3274.2024.03.013

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Characteristics of Carbonaceous Gas Emissions from Changbaishan Tianchi Volcano, Northeast China

GU Guo-hui1,2, PAN Xiao-dong1,2, GUAN Sheng1,2, ZHONG Guang-pei1, SONG Yu-jia1,2, HU Le3, LI Ying3   

  1. 1. Jilin Changbaishan Volcano National Observation and Research Station, Jilin Earthquake Agency, Changchun 130117, China;
    2. Institute of Volcanology, China Earthquake Administration, Changchun 130117, China;
    3. Institute of Earthquake Forecasting, China Earthquake Administration, Beijing 100036, China
  • Received:2024-04-24 Accepted:2024-06-11 Online:2024-07-31 Published:2024-08-28

Abstract: Identifying the scale and spatial distribution characteristics of volcanic gas releases is of great significance for volcano monitoring and eruption prediction, assessing greenhouse gas releases from geological sources, and understanding climate changes. This paper investigates the scale and spatial characterization of greenhouse gas release in the volcanic area of Changbaishan Tianchi using the accumulation chamber method and hyperspectral gas method. The results of the study showed that: ① CO2 fluxes in the volcanic area of Changbaishan Tianchi were in the range of 0.16~1051.39 g·m-2·d-1; CH4 flux values were -0.05~4.68 g·m-2·d-1. The gas release from Changbaishan Tianchi volcano was spatially characterized by a ring-band distribution, with weaker gas release at the periphery of the caldera, and the strongest gas release occurring in the Julong Hot Spring Group, Jinjiang Hot Spring Group, and the cone within the range of 1800~2200 m above sea level. ② The surface and hyperspectral satellite observations of carbonaceous gases release from Changbaishan Tianchi Volcano are correlated on both temporal and spatial scales. ③ Spatial differences in carbonaceous gas emissions from Changbaishan Tianchi volcano may be controlled by the special conditions of the caldera, fault tectonics, hot spring geothermal reservoirs, and magmatism.

Key words: Changbaishan Tianchi volcano, Gas fluxes, Hyperspectral gas, Spatial characteristics, Controlling factor

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