汤东活动断裂带气体地球化学特征

胡宁 马志敏 娄露玲 张宝山 王宇 王明亮 王文净 郭德科

胡宁, 马志敏, 娄露玲, 张宝山, 王宇, 王明亮, 王文净, 郭德科. 2019: 汤东活动断裂带气体地球化学特征. 地震学报, 41(4): 524-535. doi: 10.11939/jass.20180131
引用本文: 胡宁, 马志敏, 娄露玲, 张宝山, 王宇, 王明亮, 王文净, 郭德科. 2019: 汤东活动断裂带气体地球化学特征. 地震学报, 41(4): 524-535. doi: 10.11939/jass.20180131
Hu Ning, Ma Zhimin, Lou Luling, Zhang Baoshan, Wang Yu, Wang Mingliang, Wang Wenjing, Guo Deke. 2019: Geochemical characteristics of soil gas in Tangdong active fault zone. Acta Seismologica Sinica, 41(4): 524-535. doi: 10.11939/jass.20180131
Citation: Hu Ning, Ma Zhimin, Lou Luling, Zhang Baoshan, Wang Yu, Wang Mingliang, Wang Wenjing, Guo Deke. 2019: Geochemical characteristics of soil gas in Tangdong active fault zone. Acta Seismologica Sinica, 41(4): 524-535. doi: 10.11939/jass.20180131

汤东活动断裂带气体地球化学特征

doi: 10.11939/jass.20180131
基金项目: 地震科技星火计划项目(XH19028YSX和XH16026)和国家自然科学基金(41601584)共同资助
详细信息
    通讯作者:

    张宝山,e-mail:tuoniao667@163.com

  • 中图分类号: P315.7

Geochemical characteristics of soil gas in Tangdong active fault zone

  • 摘要: 本文采用野外多期跨断层流动观测测定了汤东活动断裂带H2,Rn和CO2的分布特征,以此分析了该断裂带的气体地球化学特征及其活动背景,从而揭示了气体地球化学特征与构造之间的联系。分析结果显示:不同测量期次的H2,Rn和CO2浓度存在显著差异,其中张河村测线的各期次测量结果中6月份各组分气体浓度均显著高于其它期次,而邢李庄测线的测量结果中1月份各组分气体浓度均显著高于其它期次;各测量期次的各气体组分分布曲线特征相似,高值异常点的重现性较好。张河村测线多期测量的H2和Rn浓度背景值分别为(8.93±3.92)×10−6和(17.38±4.28) kBq/m3,在测线西部距汤东主断裂135 m和230 m处H2与Rn同步出现高值异常;邢李庄测线H2和Rn的背景值分别为(41.20±16.64)×10−6和(29.00±8.28) kBq/m3,H2与Rn在测线西部距汤东主断裂60 m处同步出现异常。两测线的气体浓度高值异常部位与地球物理、跨断层联合钻孔详勘结果之间存在较好的对应关系,由此可推断观测气体浓度能够敏感地指示断裂带位置,而且H2和Rn浓度是汤东断裂带气体地球化学观测的关键指标。

     

  • 图  1  研究区区域构造及测线位置

    F1:汤西断裂;F2:汤中断裂;F3:汤东断裂带;F4:新商断裂;F5:盘古寺断裂;F6:凤凰岭断裂

    Figure  1.  Regional geology structure and location of observation lines for the target fault

    F1:Tangxi fault;F2:Tangzhong fault; F3:Tangdong fault zone; F4:Xinshang fault;F5:Pangusi fault;F6:Fenghuangling fault

    图  2  张河村测线H2 (a,b),Rn (c,d)和CO2 (e,f)浓度的分布特征

    Figure  2.  Distribution characteristics of soil H2 (a,b),Rn (c,d) and CO2 (e,f)concentrations on Zhanghecun measurement line

    图  3  邢李庄测线H2 (a,b),Rn (c,d)和CO2 (e,f)分布特征

    Figure  3.  Distribution characteristics of soil H2 (a,b),Rn (c,d) and CO2 (e,f)concentrations on Xinglizhuang meansurement line

    图  4  2018年1月(a)和6月(b)汤东断裂Rn浓度与CO2浓度的相关性

    Ⅰ表示气体浅部循环,Ⅱ表示可能包含部分深部来源气体,Ⅲ表示气体水平迁移

    Figure  4.  The relationships between Rn and CO2 concentration in Tangdong active fault zone

    Ⅰ indicates that Rn mainly comes from shallow gas circulation,Ⅱ indicates that the fault gases could contain partial deep-source information,Ⅲ indicates that CO2 mainly comes from gas horizontal migration

    表  1  汤东活动断裂带土壤气H2,Rn和CO2浓度分布特征

    Table  1.   Statistics on characteristics of soil H2,Rn and CO2 concentrations on Tangdong active fault zone

    测线指标时间测点数最大值最小值平均值中值下四
    分位
    上四
    分位
    四分位
    间距
    标准差峰背比背景值


    H2/10−610月3423.701.076.295.002.3810.678.295.254.398.93
    1月3244.422.788.476.024.368.143.788.326.75
    6月30110.401.5821.4713.655.6126.1020.4925.858.02
    Rn/(kBq·m−310月3438.148.5618.2017.5614.0821.477.396.662.2517.38
    1月3237.359.7617.5417.0113.4519.816.365.722.21
    6月3046.704.6419.6817.5213.6325.0511.428.892.58
    CO21月170.54%0.15%0.29%0.22%0.19%0.40%0.21%0.12 %1.99
    6月165.00%0.73%2.00%1.47%0.92%3.13%2.21%1.34%2.78


    H2/10−610月3382.1911.4137.6234.8322.7649.0926.3317.772.3541.20
    1月30185.310.658.7044.4819.7177.1757.4647.573.98
    6月3087.790.2734.8130.9416.2644.2628.0124.732.82
    Rn/(kBq·m−3)10月3362.6010.1128.3924.9119.6936.7217.0412.672.3829.00
    1月3062.2114.035.2933.9324.0845.2821.2012.481.81
    6月3059.967.5224.5822.0112.6933.3520.6614.022.71
    CO21月160.78%0.16%0.38%0.36%0.19%0.50%0.31%0.20%2.22
    6月142.00%0.52%1.09%0.98%0.63%1.53%0.91%0.51%2.04
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  • 收稿日期:  2019-01-09
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