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Title:: Study on Geochemical Characteristics of Soil Gas in Jiangsu Section of Tanlu Fault Zone

Author(s):: ZHANG Yang¹; DAI Bo¹; ZHOU Xiao cheng²; (1. Earthquake Administration of Jiangsu Province, Nanjing 210014, Jiangsu, China)(2.Institute of Earthquake Science, CEA, Beijing 100036, China)

Keywords:: soil gas; geochemical feature; anomaly concentration contrast; Tanlu Fault Zone

摘要:: 为讨论郯庐断裂带江苏段土壤气体CO₂、Rn以及Hg的地球化学特征,在重岗、晓店、桥北和何庄4个地点跨断层测量了土壤气中CO₂、Rn以及Hg的浓度。测量结果表明:郯庐断裂带江苏段上土壤气CO₂、Rn和Hg的浓度异常衬度分别为2.74～3.75, 2.05～5.73和1.84～3.96。土壤气中CO₂、Rn和Hg的浓度异常主要集中分布在断裂带内及附近,且与活动断裂带地震活动性有很好的一致性。

Abstract:: In order to discuss the geochemical features of soil gas CO₂, Rn and Hg in Jiangsu section of Tanlu Fault Zone, we measured the concentration of CO₂, Rn and Hg across the fault in Chonggang, Xiaodian, Qiaobei and Hezhuang. The measurement results show that the anomaly concentration contrasts of soil gas CO₂, Rn and Hg are 2.74～3.75, 2.05～5.73 and 1.84～3.96 respectively in Jiangsu section of Tanlu Fault Zone. The distribution of anomaly concentration of soil gas CO₂, Rn and Hg concentrated within the fault zone and its nearby, and there had good consistency between the seismic activity of the active fault zones and the concentration anomaly of soil gas CO₂, Rn and Hg.