汤东活动断裂带土壤H2、 Rn地球化学特征

地震 ›› 2019, Vol. 39 ›› Issue (2): 174-182.

汤东活动断裂带土壤H₂、 Rn地球化学特征

胡宁¹, 马志敏², 王明亮³, 王宇¹, 娄露玲¹, 夏修军³, 张宝山¹, 王文净¹, 郭德科³

1.河南省新乡市地震局, 河南新乡 453000;
2.河南省新乡市第一中学, 河南新乡 453000;
3.河南省地震局, 河南郑州 450000

收稿日期:2017-12-15 出版日期:2019-04-30 发布日期:2019-08-09
通讯作者: 王明亮, 工程师。 E-mail: 704397278@qq.com
作者简介:胡宁(1983-), 男, 河南罗山人, 高级工程师, 博士, 主要从事第四纪地质环境研究
基金资助:
中国地震局三结合项目(CEA-JC/3JH-171706); 中国地震局星火计划攻关项目(XH16026); 中国地震局星火计划青年项目(XH19028YSX)

Geochemical Characteristics of Soil Gas H₂ and Rn in the Tangdong Active Fault

HU Ning¹, MA Zhi-min², WANG Ming-liang³, WANG Yu¹, LOU Lu-ling¹, XIA Xiu-jun³, ZHANG Bao-shan¹, WANG Wen-jing¹, GOU De-ke³

1.Earthquake Administration of Xinxiang City, Henan Xinxiang 453000, China;
2.Xinxiang No.1 High School, Henan Xinxiang 453000, China;
3.Henan Earthquake Administration, Henan Zhengzhou 450000, China

Received:2017-12-15 Online:2019-04-30 Published:2019-08-09

摘要/Abstract

摘要： 为研究汤东断裂带土壤气体地球化学特征及其所反映的构造地球化学背景, 采用野外监测的方法分析了张河村与邢李庄村两条测线的土壤H₂、 Rn分布特征。结果表明, 张河村H₂浓度、 Rn活度浓度的分布范围分别为0.24×10^-6～174.7×10^-6、 13.3～69.8 kBq·m^-3, 背景值分别为14.26×10^-6, 24.8 kBq·m^-3。邢李庄测线H₂浓度、 Rn活度浓度的分布范围11.8×10^-6～67.06×10^-6、 43.6～72.6 kBq·m^-3, 背景值分别为37.13×10^-6、 72.6 kBq·m^-3。张河村测线在90～105 m处, H₂、 Rn出现强烈高值异常, 而120～150 m处出现高值异常。异常值位于断裂带附近, H₂、 Rn气体测值对断裂位置具有良好的指示作用。气体异常主要受汤东活动断裂构造控制, 汤东断裂下方的深大断裂和汤阴地堑中下地壳的低速体对深部气体释放有重要作用。

关键词: 断裂带, H₂、 Rn异常成因, 构造条件, 汤东活动断裂

Abstract: In order to study the geochemical characteristics of soil gas and the tectono-geochemical background reflected by fault gas in the Tong-Dong fault zone, the field monitoring method was used to analyze the concentration distribution of soil H₂ and Rn in the two observation lines of Zhanghe village and Xinglizhuang village. The results show that the distributions of H₂ and Rn concentration in Zhanghe village ranged from 0.24 to 174.7×10^-6 and 13.3 to 69.8 kBq·m^-3, respectively. The background values of H₂ and Rn concentration are 14.26×10^-6 and 24.8 kBq·m^-3, respectively. The range of concentration distribution of H₂ and Rn in Xinglizhuang observation line ranged from 11.8 to 67.06×10^-6 and 43.6 to 72.6 kBq·m^-3 respectively, with background values of 37.13×10^-6 and 72.6 kBq·m^-3, respectively. In the measure line of Zhanghe village, strong anomaly of H₂ and Rn appeared at 90～105 m, but a higher anomaly occurred at 120～150 m, with anomalous values near the fault zone, which indicates the location of the fracture effectively. Integrated geological structure and physical geography, it is concluded that the high value anomaly of the gas composition in the survey line are mainly controlled by the tectonic conditions, and it is also affected by sediment properties and meteorological factors. Therefore, we should further track and monitor the gas composition in the soil layer of the target fault zone, and analyze the temporal and spatial variation of fault activity, and take gas isotope techniques to explore the source of the components, so as to enhance the important role of gas geochemical indicators for fault tectonics activity and to strengthen the efficiency of earthquake prevention.

Key words: Active fault zone, Soil gas, Construction conditions, Tangdong Fault

中图分类号:

P315.7

胡宁, 马志敏, 王明亮, 王宇, 娄露玲, 夏修军, 张宝山, 王文净, 郭德科. 汤东活动断裂带土壤H₂、 Rn地球化学特征[J]. 地震, 2019, 39(2): 174-182.

HU Ning, MA Zhi-min, WANG Ming-liang, WANG Yu, LOU Lu-ling, XIA Xiu-jun, ZHANG Bao-shan, WANG Wen-jing, GOU De-ke. Geochemical Characteristics of Soil Gas H₂ and Rn in the Tangdong Active Fault[J]. EARTHQUAKE, 2019, 39(2): 174-182.

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汤东活动断裂带土壤H₂、 Rn地球化学特征

Geochemical Characteristics of Soil Gas H₂ and Rn in the Tangdong Active Fault

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