新保安—沙城断裂带土壤气地球化学特征分析

地震 ›› 2015, Vol. 35 ›› Issue (4): 90-98.

新保安—沙城断裂带土壤气地球化学特征分析

盛艳蕊¹, 张子广¹, 周晓成², 杜建国², 周月玲¹, 张冠亚², 张瑞鑫², 刘永梅³, 孙玉涛⁴, 丁志华¹

1.河北省地震局, 石家庄 050021;
2.中国地震局地震预测研究所, 北京 100036;
3.内蒙古自治区地震局, 呼和浩特 014400;
4.中国科学院地质与地球物理研究所, 北京 100029

收稿日期:2015-04-01 出版日期:2015-10-31 发布日期:2020-06-28
作者简介:盛艳蕊(1983-), 女, 河北衡水人, 工程师, 主要从事地震地下流体研究。
基金资助:
河北省地震科技星火计划项目(DZ20141226079)和中国地震局地震预测研究所基本科研业务费专项部门任务专项(2014IES0303)

Geochemical Characteristics of Soil Gas in the Xinbaoan—Shacheng Fault

SHENG Yan-rui¹, ZHANG Zi-guang¹, ZHOU Xiao-cheng², DU Jian-guo², ZHOU Yue-ling¹, ZHANG Guan-ya², ZHAN Rui-xin², Liu Yong-mei³, SUN Yu-tao⁴, DING Zhi-hua¹

1. Earthquake Administration of Hebei Province, Shijiazhuang 050021, China;
2. Institute of Earthquake Science, CEA, Beijing 100036,China;
3. Earthquake Administration of Inner Mongolia Autonomous Region, Hohhot 014400, China;
4. Institute of Geology and Geophysics, CAS, Beijing 100029, China

Received:2015-04-01 Online:2015-10-31 Published:2020-06-28

摘要/Abstract

摘要： 测量断裂带土壤气浓度变化, 是监测断裂活动性和地震危险性的重要途径之一。 2014年5月, 我们在怀来地区新保安-沙城断裂测量了断层土壤气H₂、 He、 CO₂、 Rn、 Hg浓度以及CO₂、 Rn、 Hg的通量。测量结果显示: H₂、 He、 CO₂、 Rn、 Hg浓度变化范围分别为, H₂: (0.4～34.2)×10^-6、 He: (2.8～7)×10^-6、 CO₂: (0.051～1.19)%、 Rn: (0.31～18.22) kBq/m³、 Hg: (2～54) ng/m³。土壤气H₂和Rn是揭示断层位置的有效参数之一, 在断层附近以及有陡坎的地区有明显高值异常。通过对怀来地区新保安-沙城断裂土壤气浓度及通量地球化学研究初步确定断裂带有较高的脱气强度, 与此区域地震活动性有一定的关系。

关键词: 土壤气, 气体地球化学, 新保安—沙城断裂

Abstract: Measurement of soil gas concentration in fault zone is one of the important ways to monitoring fracture activity and seismic risk. We surveyed the soil gas concentrations (H₂, He, CO₂, Rn, Hg) and soil gas flux (CO₂, Rn, Hg) of the Xinbaoan—Shacheng fault in Huailai in May, 2014. The results show that the ranges of concentration of H₂, He, CO₂, Rn, Hg are respectively (0.4~34.2)×10^-6, (2.8~7)×10^-6, (0.051~1.19)%, (0.31~18.22) kBq/m³, (2~54)ng/m³. Soil gases of H₂ and Rn are effective parameters to reveal the fault location, which show significantly high value anomaly in the fault and scarp areas. We can preliminary confirm that there is higher gas effusion by the study results of soil gas concentrations and gas flux in Xinbaoan—Shacheng fault, which is related to seismic activity in this region.

Key words: Soil gas, Geochemistry, Xinbaoan—Shacheng fault

中图分类号:

P315.7

盛艳蕊, 张子广, 周晓成, 杜建国, 周月玲, 张冠亚, 张瑞鑫, 刘永梅, 孙玉涛, 丁志华. 新保安—沙城断裂带土壤气地球化学特征分析[J]. 地震, 2015, 35(4): 90-98.

SHENG Yan-rui, ZHANG Zi-guang, ZHOU Xiao-cheng, DU Jian-guo, ZHOU Yue-ling, ZHANG Guan-ya, ZHAN Rui-xin, Liu Yong-mei, SUN Yu-tao, DING Zhi-hua. Geochemical Characteristics of Soil Gas in the Xinbaoan—Shacheng Fault[J]. EARTHQUAKE, 2015, 35(4): 90-98.

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