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[1]LI Jing,ZHOU He,CHEN Zhi,et al.Degassing Characteristics of CO2 and Rn from the Active Fault in Western Beijing and Their Environmental Impact[J].Journal of Seismological Research,2023,46(01):49-57.[doi:10.20015/j.cnki.ISSN1000-0666.2023.0011 ]

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Degassing Characteristics of CO₂ and Rn from the Active Fault in Western Beijing and Their Environmental Impact

Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume: 46 Number of periods: 2023 01 Page number: 49-57 Column: 地震地下流体监测预报理论及技术应用专栏 Public date: 2023-01-01

Title:: Degassing Characteristics of CO₂ and Rn from the Active Fault in Western Beijing and Their Environmental Impact

Author(s):: LI Jing¹; 4; ZHOU He²; CHEN Zhi³; LU Lina¹; 4; DU Jianguo³; (1.Institute of Disaster Prevention,Sanhe 065201,Hebei,China)(2.Petro China Jidong Oilfield Company,Tangshan 063000,Hebei,China)(3.Key Laboratory of Earthquake Prediction,Institute of Earthquake Forecasting,China Earthquake Administration,Beijing 100036,China)(4.Hebei Key Laboratory of Earthquake Dynamics,Langfang 065201,Hebei,China)

Keywords:: soil gas; active fault; degassing; western Beijing; CO₂; Rn

CLC:: P315.72

DOI:: 10.20015/j.cnki.ISSN1000-0666.2023.0011

Abstract:: The concentrations and fluxes of CO₂ and Rn degassing from the Huangzhuang-Gaoliying fault,the Babaoshan fault and the Nankou piedmont fault in western Beijing were measured in two consecutive years using the cross-fault soil gas measurement method,and the fault degassing characteristics in the study area and their environmental impact were analyzed.The results indicated that:The average soil gas concentration and KQ value of the Xiwanglu survey area in the northern section of the Huangzhuang-Gaoliying fault are the largest,which indicated the strong tectonic activity in the northern segment of the fault.The average soil gas concentration and tectonic activity of the three faults in the study area characterized higher in the East and lower in the West which are consistent with the geochemical background characteristics of the soil gas in the capital area.The total annual output of CO₂ from the three active fault are approximately 0.45×10⁶ t.The average concentration of Rn in soil gas in the Xiwanglu survey area is higher than 20 kBq?m^-3,the ground floor anti-cracking measures should be taken for nearby buildings,and in some measured points which the concentration of Rn in soil gas are higher than 30 kBq?m^-3or 50 kBq?m^-3,waterproof treatment or comprehensive radon prevention measures are required to prevent Rn diffusing into the buildings.

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Last Update: 2023-01-01