新保安—沙城断裂带土壤气地球化学特征分析

Abstract

Abstract: Measurement of soil gas concentration in fault zone is one of the important ways to monitoring fracture activity and seismic risk. We surveyed the soil gas concentrations (H₂, He, CO₂, Rn, Hg) and soil gas flux (CO₂, Rn, Hg) of the Xinbaoan—Shacheng fault in Huailai in May, 2014. The results show that the ranges of concentration of H₂, He, CO₂, Rn, Hg are respectively (0.4~34.2)×10^-6, (2.8~7)×10^-6, (0.051~1.19)%, (0.31~18.22) kBq/m³, (2~54)ng/m³. Soil gases of H₂ and Rn are effective parameters to reveal the fault location, which show significantly high value anomaly in the fault and scarp areas. We can preliminary confirm that there is higher gas effusion by the study results of soil gas concentrations and gas flux in Xinbaoan—Shacheng fault, which is related to seismic activity in this region.

Key words: Soil gas, Geochemistry, Xinbaoan—Shacheng fault

CLC Number:

P315.7

SHENG Yan-rui, ZHANG Zi-guang, ZHOU Xiao-cheng, DU Jian-guo, ZHOU Yue-ling, ZHANG Guan-ya, ZHAN Rui-xin, Liu Yong-mei, SUN Yu-tao, DING Zhi-hua. Geochemical Characteristics of Soil Gas in the Xinbaoan—Shacheng Fault[J]. EARTHQUAKE, 2015, 35(4): 90-98.

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Geochemical Characteristics of Soil Gas in the Xinbaoan—Shacheng Fault

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