北京平原区隐伏断裂与氡浓度响应关系

doi:10.11720/wtyht.2022.1066

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Abstract

Concealed faults are developed in the Beijing area. They intersect with NW- and NE-trending faults, forming a potential tectonic background of earthquakes in the future. To study the relationship between active faults and the radon concentration in soil, this study measured the radon concentration of two profiles (NW- and NE-trending) in plain areas of Beijing. Through tests and analysis, this study roughly ascertained the relationship between concealed structures and the radon concentration in soil, as well as the geological factors influencing the radon concentration of soil. The results show that the radon concentration in areas with active faults is significantly higher than that in the surrounding areas, and the radon concentration in areas with complex structure and highly active faults changes more noticeably. The depth of Cainozoic strata constrains the dissipation of radon to a certain extent, and there is a positive correlation between the depth of Cainozoic strata and the radon concentration in soil. The specific activity of radionuclides in parent rocks with different soil quality also affects the background value of regional radon concentration. The results of this study determined the relationship between concealed faults ahe specific activity of radionuclides in parent rocks with different soil quality also affect the background value of regional radon concentration. The results of this nd the radon concentration in soil and identified the influence of the thickness of Cainozoic strata and parent rocks with different soil quality on the radon concentration in soil, thus serving as an important reference and guidance for the surveys of concealed faults and the research on radon concentration in plain areas of Beijing in the future.

Key words： radon in soil specific activity of radionuclides radon concentration burial fault urban geology

Received: 03 February 2021 Published: 28 June 2022

ZTFLH:

P632

Corresponding Authors: BAI Ling-Yan E-mail: zxlddy@163.com;bly2030@126.com

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	Articles by authors
	Xiao-Liang ZHANG
	Ling-Yan BAI
	Jing-Bo NI
	Zhi-Hui WANG
	Yong ZHAO
	Fu-Bing HE

Cite this article:

Xiao-Liang ZHANG,Ling-Yan BAI,Jing-Bo NI, et al. Relationship between concealed faults and radon concentration in plain areas of Beijing[J]. Geophysical and Geochemical Exploration, 2022, 46(2): 344-351.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2022.1066 OR https://www.wutanyuhuatan.com/EN/Y2022/V46/I2/344

Tectonic map of the study area

Survey line in the working area

Statistics of radon concentration changes in two profiles

Composite profile of radon concentration and geological in D1

Statistical of radon concentration variation in profiles D1(aa')

Fig.3)
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Composite profile of radon concentration and geological in D2(the legend is the same as Fig.3)

Statistical of radon concentration variation in profiles D2(bb')

Dffusion coefficient about radon andthorium in different rocks

Histogram of different areas aboutnuclide specific activity

Histogram of different rocks about nuclide specific activity

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