The Geochemical Characteristics of Soil Gas in the Southeastern Part of Haiyuan Fault
详细信息
- 责任者：Zhou Xiaocheng (School of Earth and Space Sciences ; University of Science and Technology of China ; Hefei 230026 ; China) ; Wang Chuanyuan
- 刊名：Seismology and Geology
- 出版年：2011
- 卷期：33(1)
- 关键词：大震 ; great earthquakes ; 气体地球化学测量 ; gaseous geochemical surveys ; 宁夏 ; Ningxia
- 页码：p.123-132
- 图表：5 illus., 2 tables, 32 refs.
- 分类号：0500
- 出版序号：20120105
- issnNo：ISSN0253-4967
- isbnNo：CN11-2192/P
摘要
The concentration of soil gas He, H2, N2,O2, CH4, C2H6, Rn, Hg and flux of soil gas He, H2, CH4, Rn, Hg were surveyed at four sites (Xiaokou, Bazhiyao, Caixiangpu and Xiaonanchuan) in the southeastern part of Haiyuan Fault. Soil-gas concentrations of more than 200 samples were obtained. The results show that the background values of N2/O2, Hg, Rn were 4.2, 50.4 ng/m3and 5.8 k Bq/m3, respectively. The maximum concentrations of He and CH4 were 65.3 and 537.7 ppm, respectively, at the end of the southeastern part of Haiyuan Fault.Furthermore, soil gas He and CH4 were intensively degassed. The maximum flux of He and CH4 in soil gas was 6.9 and 390 mg m-2d-1, respectively.