欢迎访问《地震》，
地震

地震 ›› 2005, Vol. 25 ›› Issue (1): 15-21.

• • 上一篇    下一篇

中国大陆科学钻探工程主孔地下流体特征及与地震活动的关系初步研究

孙青1, 李圣强2, 罗立强1   

  1. 1.国家地质实验测试中心, 北京 100037;
    2.中国地震局地震预测研究所, 北京 100036
  • 收稿日期:2004-08-18 修回日期:2004-09-16 出版日期:2005-01-31 发布日期:2021-11-10
  • 作者简介:孙青(1967-), 女, 安徽寿县人, 1998年获博士学位, 副研究员, 主要从事地球化学等研究。
  • 基金资助:
    “九五”国家重大科学工程项目“中国大陆科学钻探工程”、 国家自然科学基金重大项目(40399144)和国家重点基础研究发展规划项目(2003CB716508)

Geochemistry of some fluid compositions in the mud of CCSD main well and their relations to seismicity

SUN Qing1, LI Sheng-qiang2, LUO LI-qiang1   

  1. 1. Institute of Rock and Mineral Analysis, Chinese Academy of Geological Sciences, Beijing 100037;
    2. Institute of Earthquake Science, CEA, Beijing 100036, China
  • Received:2004-08-18 Revised:2004-09-16 Online:2005-01-31 Published:2021-11-10

PDF (PC)

163

摘要： 收集了中国大陆科学钻探主孔工程(CCSD)主孔中117～2045 m深度地下流体某些组分(He、 Ar、 CO2、 CH4)的浓度资料和2001年7月1日至2002年4月30日时间段内钻孔周围500 km范围内震级ML≥1.0地震目录资料, 对其流体资料进行日均值处理、 差分分析和最大相关系数处理。 由日均值浓度看出地震前后He、 Ar、 CO2、 CH4浓度存在明显异常; 最大相关系数分析表明, CH4和CO2组分两者相关性好, 最大相关系数平均值为0.95, 均方差为0.08, 说明两者可能具有相同的来源。 CH4和CO2浓度日均值最大相关系数在地震前后出现明显的异常波动。 主孔中的地下流体特征及与周围地震活动的对应关系揭示大陆科学钻探主孔中的地下流体异常与区内地震活动可能存在一定关系。

关键词: 地下流体, 地球化学特征, 地震活动, CCSD主孔

Abstract: The concentrations of some fluid compositions such as He, Ar, CO2 and CH4 in the mud of CCSD main well at depths between 100 and 2045m are collected and analyzed in this paper. To study the relationship between the anomalous variations of fluids and seismic activities within the focus area, the authors have obtained and compiled seismic catalogues with magnitude over 1.0 in the period of July 1, 2002~April 30, 2002. The concentrations of these fluid components (He, Ar, CO2 and CH4) are analyzed and processed using the daily statistics, the calculus of difference and the maximum coefficient of correlation of CO2-CH4. It is indicated from these results that the anomalous variation occurs before or after seismic activity. From the features of some fluid composition in the CCSD main well and the seismic activity at CCSD site within the radius if 500 km, it can be concluded that the features of fluids in the main well were possibly responsible for seismic activity.

Key words: Fluid, Geochemistry, Seismic activity, CCSD main well

中图分类号: