2014年在山西地震带北段和张家口-渤海地震带布设35个测量剖面，测量土壤气CO2、Rn浓度及深度20 cm、1 m的CO2和Rn通量。测量结果表明：①CO2、Rn浓度与深度20 cm、1 m的CO2、Rn通量的平均值和最大值变化趋势大致相同，均呈自西向东的增大趋势；②深度20 cm、1 m的CO2和Rn通量相关性均不明显，但1 m深的CO2、Rn通量明显较高；③CO2和Rn浓度、通量变化主要与区域复杂的地震活动性和断层活动性有关，主要受到地表化学成分和区域岩石地球化学影响。
Using observations at 35 measurement profiles arranged in the northern Shanxi seismic zone and Zhang Jiakou-Bohai seismic zone in 2014, we investigated CO2 and Rn concentrations, and the gas fluxes of the CO2 and Rn at the depths of 20 cm and 1 m. The results showed that:①The variation trends of the average and maximum values of CO2 and Rn soil gas concentrations, 20 cm deep and 1m deep CO2 and Rn fluxes were basically the same, which both showed an increasing trend from west to east; ②The correlation coefficient of CO2 and Rn fluxes at the depths of 20 cm and 1 m were both low, but the CO2, Rn fluxes at the depth of 1 m were significantly higher than that of 20 cm; ③The concentrations and fluxes of CO2 and Rn are mainly related to regional complex seismicity and fault activity and affected by surface chemical composition and regional rock geochemistry.
2020,41(2): 113-122 收稿日期：2019-10-11
DOI：10.3969/j.issn.1003-3246.2020.02.013
基金项目：中国地震局地震预测研究所基本科研业务费（项目编号：2016IES010304，2017IES010205，2018IES010104）；国家重点研发计划（项目编号：2017YFC1500501）；国家自然科学基金面上项目（项目编号：41673106）
作者简介：赵红坤(1993-),女,硕士研究生在读,研究方向:应用地球化学。E-mail:878063323@qq.com
*通讯作者：周晓成(1978-),男,研究员,主要研究方向:构造地球化学,流体地球化学。E-mail:zhouxiaocheng188@163.com
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