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地震 ›› 2018, Vol. 38 ›› Issue (4): 109-119.

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河南太康县群井异常现象的地球化学成因分析

钟骏1, 周志华1, 李源2, 王博1, 夏修军2   

  1. 1.中国地震台网中心, 北京 100045;
    2.河南省地震局, 河南 郑州 450016
  • 收稿日期:2017-02-04 发布日期:2019-08-15
  • 通讯作者: 周志华,副研究员。E-mail:zhouzhihua@seis.ac.cn
  • 作者简介:钟骏(1988-),男,江西赣州人,研究实习员,主要从事地下流体动力学和地震预测研究
  • 基金资助:
    国家自然科学基金青年项目(41503114); 地震科技星火计划项目(XH15011); 中国地震台网中心青年基金项目(QNJJ201506、 QNJJ201610)

Geochemical Analysis of Anomaly Phenomena of Some Wells in Taikang County, Henan

ZHONG Jun1, ZHOU Zhi-hua1, LI Yuan2, WANG Bo1, XIA Xiu-jun2   

  1. 1.China Earthquake Network Center, Beijing 100045, China;
    2.Henan Earthquake Administration, Henan Zhengzhou 450016, China
  • Received:2017-02-04 Published:2019-08-15

摘要: 2016年5月23日河南太康县1 km范围内7口农业灌溉井出现了翻花、 冒泡、 响声等宏观异常现象。 为判定异常现象是否与区域内构造活动和地下应力改变有关, 2016年5月26~28日采集了16个灌溉井水样、 2个引黄水样及4个灌溉井气样, 获取了水的离子浓度和氢氧同位素组成以及气体组分和碳同位素组成等地球化学数据。 结果表明: 区域内井水与引黄河水存在一定的水力联系, 与深部地下水没有明显的水力联系; 井水中富含Cl-、 SO2-4及NO-3等离子是人类活动影响所致; 井内逸出气体主要是生物成因。 结合区域内异常发生前, 两次引水灌溉规模资料, 认为2016年5月23日河南太康群井异常现象是人为引水灌溉引起的, 与区域内构造活动和地下应力改变没有直接联系, 排除其是地震宏观前兆的可能。

关键词: 宏观异常, 地球化学, 异常成因

Abstract: Macro anomalies, such as strong roll, bubbles and sound in 7 irrigation wells within 1 km of Taikang County, Henan Province, occurred on 23rd May 2016. The field investigation was conducted in order to judge whether the phenomena are related to regional tectonic activity or the change of underground stress. 16 samples of well water, 2 samples of drawing water from the Yellow River and 4 samples of well gas were collected. Ion concentration, isotopic ratios and gas composition of the samples were measured. The results indicated that ① there is a certain hydraulic connection between well water and water drawing from the Yellow River, but hydraulic connection between well water and deep groundwater is not obvious; ② the enrichment of Cl-, SO2-4 and NO-3 in well waters is caused by human activity; and ③ the escaped gases in the wells are mainly biogenic. The anomaly phenomena were caused by artificial irrigation based on two irrigation data before occurrence of anomalies, and no evidence for the correlation between the genesis of anomalies and regional tectonic activity or the change of underground stress was found. Consequently, the possibility of seismic macro precursor is eliminated.

Key words: Macro Anomaly, Geochemistry, Water wells

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