Advances in Earth Science ›› 2017, Vol. 32 ›› Issue (8): 818-827. doi: 10.11867/j.issn.1001-8166.2017.08.0818
Special Issue: Seismic Survey;
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Zhou Xiaocheng 1, Shi Hongyu 1, Chen Chao 2, Zeng Linghua 2, Sun Fengxia 1, Li Jing 3, Chen Zhi 1, Lü Chaojia 1, Huang Dan 1, Du Jianguo 1
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Project supported by the Basic Research Project of Institute of Earthquake Science,China Earthquake Administration “Fluid geochemical characteristics of hot springs at the junction of Honghe fault and Xiaojiang fault”(No.2017IES010205); The National Natural Science Foundation of China “Degassing of CO2 along the Xianshuihe-Anninghe-Zemuhe-Xiaojiang active faults”(No.41673106)
Zhou Xiaocheng, Shi Hongyu, Chen Chao, Zeng Linghua, Sun Fengxia, Li Jing, Chen Zhi, Lü, Chaojia, Huang Dan, Du Jianguo. Spatial-temporal Variations of H 2 Concentration in Soil Gas in the Seismic Fault Zone Produced by the Wenchuan M S 8.0 Earthquake[J]. Advances in Earth Science, 2017, 32(8): 818-827.
Degassing of Hydrogen (H2) from fault may be a good indicator of fault activity. The concentration of H2 in soil gas in the seismic surface rupture zone produced by the Wenchuan MS 8.0 earthquake was investigated in twenty three measuring regions in order to explore the relationship between the spatio-temporal variations of H2 concentration in soil gas along the seismic rupture zone and the vertical displacements and aftershocks activities. The results indicated: ① the sources of H2 were directly related to from the release of natural gas reservoirs; ②the average concentration of H2 in soil gas spatially decreased from Yingxiu to Nanba; ③the magnitudes of the H2 concentration anomalies declined significantly with time. It is very significant to study the variation tendency of atmospheric environment with further research of degassing of H2 from faults.