Abstract

The Xiadian active fault is one of the most important seismological faults in the vicinity of Beijing-Tianjin-Hebei region. This paper mainly focuses on the geochemical characteristics of the fault to unveil and evaluate its activity. Via the application of soil gaseous radon measurement, a detailed field study at Qixinzhuang segment of Xiadian fault is proposed. Based on all the radon impulse value we acquired of 3 profiles in the study area. We plotted the radon impulse trend chart of 3 profiles, analyzed anomaly distribution of soil gaseous radon and discussed the scale and activity of the Xiadian fault. The radon multiple-peaks anomaly of Qixinzhaung segemnt demonstrates the hidden faults underground exist.

Highlights

  • The Xiadain fault is an important hidden active fault of Beijing plain area [1,2], located in the north of the North China Plate, general trend is NE45°,extends 45 km

  • According to the radon impulse trend charts, we analyzed the characteristics of soil gaseous radon anomaly distribution and the spacial location of the fault in Qixinzhuang section and discussed the scale and activity of Xiadian fault

  • The soil gaseous radon impulse anomaly of Xiadian fault indicates that the multiple peaks anomaly of Radon impulse value at Qixinzhaung section where multiple hidden faults exist

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Summary

Introduction

The Xiadain fault is an important hidden active fault of Beijing plain area [1,2], located in the north of the North China Plate, general trend is NE45°,extends 45 km. A large number of data shows that the more active the fault is, the more fault-gas it has [3,4,5,6]. Based on this idea, In this paper, we used the method of soil gaseous radon measurement in Qixinzhuang section and carried on a detailed field survey on site. According to the radon impulse trend charts, we analyzed the characteristics of soil gaseous radon anomaly distribution and the spacial location of the fault in Qixinzhuang section and discussed the scale and activity of Xiadian fault

Geological setting
Measuring line layout
Instrument introduction
Shahejie
Fault spacial location analysis
Fault scale and activity analysis
Summary

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