欢迎访问《地震》,

地震 ›› 2025, Vol. 45 ›› Issue (2): 85-99.doi: 10.12196/j.issn.1000-3274.2025.02.006

• • 上一篇    下一篇

2020年嫩江ML4.6地震前断层土壤气地球化学特征与构造活动关系研究

李继业1, 马龙辰1, 胡澜缤2, 康健1, 刘双1, 年华1   

  1. 1.黑龙江省地震局, 黑龙江 哈尔滨 150000;
    2.哈尔滨市应急救援保障中心, 黑龙江 哈尔滨 150021
  • 收稿日期:2024-04-15 接受日期:2024-10-30 发布日期:2025-09-05
  • 作者简介:李继业(1981-), 男, 山东单县人, 高级工程师, 主要从事地下流体和地震综合预测研究。 E-mail: jiye_li@126.com
  • 基金资助:
    中国地震局科技星火计划攻关项目(XH19011); 地震预测开放基金项目(XH22035D)

Relationship between Geochemical Characteristics of Fault Soil Gas and Tectonic Activity before the 2020 Nenjiang ML4.6 Earthquake

LI Ji-ye1, MA Long-chen1, HU Lan-bin2, KANG Jian1, LIU Shuang1, NIAN Hua1   

  1. 1. Heilongjiang Earthquake Agency, Harbin 150000, China;
    2. Harbin Technical Center of Earthquake Prevention and Disaster Reduction, Harbin 150021, China
  • Received:2024-04-15 Accepted:2024-10-30 Published:2025-09-05

摘要: 流体地球化学在地震短临预测、 地震前兆研究以及构造活动分析中发挥着重要作用。 基于松辽盆地断层土壤气Hg和H2浓度野外定点连续观测及定期流动测量数据, 分析讨论了2020年2月7日黑龙江嫩江ML4.6地震前, 气体地球化学短临异常与火山区小震活动、 卫星热红外长波辐射以及日本海板块俯冲动力作用的关系。 取得认识如下: ① 肇东断层土壤气Hg和H2浓度在嫩江ML4.6地震前存在准同步异常。 ② 2020年嫩江ML4.6地震前, 讷谟尔河断裂上的龙河镇与和平镇测线土壤气H2浓度低值异常与五大连池火山区小震活动频度下降相关。 ③ 嫩江ML4.6地震前后热红外长波辐射涡度场存在明显的时空演化特征, 空间上, 涡度场异常区沿嫩江断裂向震中区逐渐演化; 时间上, 低值异常时段与土壤气H2浓度低值、 火山区小震活动年度低频较为同步。 ④ 嫩江ML4.6地震前断层土壤气异常与构造活动存在一定的内在联系。

关键词: 流体地球化学, 断层土壤气, 构造活动, 2020年嫩江ML4.6地震

Abstract: Fluid geochemistry plays an important role in short-term and imminent earthquake prediction, earthquake precursor research and tectonic activity analysis. Based on field fixed-point observations and flow measurements of fault soil gas Hg and H2 concentrations in the Songliao Basin, the relationship between short-term and imminent gas geochemical anomalies and small earthquakes in volcanic areas, satellite thermal red long-wave radiation, and the subduction dynamics of the Japan Sea plate before the Nenjiang ML4.6 earthquake in Heilongjiang on February 7, 2020 is analyzed and discussed. The conclusions are as follows: ① There is a quasi-synchronous anomaly in soil gas Hg and H2 concentrations in Zhaodong fault before the Nenjiang ML4.6 earthquake. ② Before the Nenjiang ML4.6 earthquake in 2020, the low value anomaly of soil gas H2 concentration on the Longhe Town and Heping Town survey lines on the Nemoer River fault was related to the decrease in the frequency of small earthquakes in the Wudalianchi Volcanic Area. ③ The vorticity field of thermal red long-wave radiation before and after the Nenjiang ML4.6 earthquake has obvious temporal and spatial evolution characteristics. In space, the vorticity field anomaly area gradually evolves along the Nenjiang fault to the epicenter area; In time, the low value anomaly period is synchronized with the low value of soil gas H2 concentration and the annual low frequency of small earthquakes in volcanic areas. ④ Before the Nenjiang ML4.6 earthquake, the fault soil gas anomaly is intrinsically related to tectonic activity.

Key words: Fluid geochemistry, Fault soil gas, Tectonic activity, the 2020 Nenjiang ML4.6 earthquake

中图分类号: