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[1]WANG Jiang,CHEN Zhi,ZHANG Fan,et al.Spatial Distribution and Movement of Active Faults in Xiong'an New Area: Insights from Geochemical Soil Gas[J].Journal of Seismological Research,2022,45(02):264-274.[doi:10.20015/j.cnki.ISSN1000-0666.2022.0019 ]

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Spatial Distribution and Movement of Active Faults in Xiong'an New Area: Insights from Geochemical Soil Gas

Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume: 45 Number of periods: 2022 02 Page number: 264-274 Column: Public date: 2022-05-20

Title:: Spatial Distribution and Movement of Active Faults in Xiong'an New Area: Insights from Geochemical Soil Gas

Author(s):: WANG Jiang¹; 2; CHEN Zhi³; ZHANG Fan¹; 2; ZHANG Zhixiang¹; 2; LIU Zhaofei³; HE Hongyi³; TANG Jie¹; 2; DING Zhihua¹; 2; ZHANG Suxin¹; 2; (1.Hebei Hongshan National Observatory on Thick Sediments and Seismic Hazards,Xingtai 054000,Hebei,China)(2.Hebei Earthquake Agency,Shijiazhuang 050021,Hebei,China)(3.Key Laboratory of Earthquake Prediction,Institute of Earthquake Forecasting,China Earthquake Administration,Beijing 100036,China)

Keywords:: Xiong'an New Area; soil gas; geochemistry; gas concentration; buried fault; fault activity

CLC:: P315.724

DOI:: 10.20015/j.cnki.ISSN1000-0666.2022.0019

Abstract:: The geochemical observation of the soil gas in the fault zone is one of the most important means of detecting buried faults and analyzing fault activity.The spatial distribution of the concentration of soil gases Rn,CO₂,and Hg are obtained by field measurement at 542 equispaced points and on 6 profiles across 5 active faults in Xiong'an New Area.Clustered distribution of the soil gas Rn,CO₂,and Hg with high concentration along the Niudong fault,Branch 1 of the Niudong fault,Branch 2 of the Niudong fault,Rongcheng fault and Xushui-dacheng fault are presented in the geochemical background using Kriging interpolation.This indicates that the five faults are more active.The fault outlines are further delineated according to the distribution of the soil gas concentration and the results from urban active fault detection.In addition,the relative intensity of the soil gas concentration in the 5 active faults decreases from the southeast to the northwest in Xiong'an New Area,suggesting the weakening of faults' activity from the southeast to the northwest,and the Niudong fault in the southeast of Xiong'an New Area could be the most active; the relative-intensity value of Rn concentration in this fault is higher than those in the other 18 major active faults in the Capital area.There is little difference between the movement of the sections of the 5 active faults in Xiong'an New Area.

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Last Update: 2022-05-20