2012年6月30日新源Ms6.6地震前后北天山泥火山及温泉的水化学变化

地震 ›› 2014, Vol. 34 ›› Issue (3): 97-107.

2012年6月30日新源M_s6.6地震前后北天山泥火山及温泉的水化学变化

陈志^1,2, 杜建国², 周晓成², 崔月菊², 刘雷², 李营², 张文来³, 高小其³, 许秋龙³, 王海涛³

1.中国科学技术大学地球与空间科学学院,安徽合肥230026;
2.中国地震局地震预测重点实验室,中国地震局地震预测研究所,北京100036;
3.新疆维吾尔自治区地震局,新疆乌鲁木齐830011

收稿日期:2012-10-30 修回日期:2014-03-19 出版日期:2014-07-31 发布日期:2020-09-08
作者简介:陈志(1983-),男,湖北咸宁人,助理研究员,主要从事流体地球化学和地震地质研究。
基金资助:
中国地震局地震预测研究所基本科研业务费(2012IES0309)和国家科技支撑计划项目(60093301)资助

Hydrogeochemical Changes of Mud V olcanoes and Springs in North Tianshan Related to the June 30,2012 Xinyuan M_s6.6 Earthquake

CHEN Zhi^1,2, DU Jian-guo², ZHOU Xiao-cheng², CUI Yue-ju², LIU Lei², LI Ying²

1. School of Earth and Space Sciences,University of Science and Technology of China, Hefei 230026,China;
2. Key Laboratory of Eart hquake Prediction, Institute of Eart hquake Science, CEA, Beijing 100036, China;
3. Earthqua ke Administration of Xinjiang Uygur Autonomous Region, Urumqi 830011, China

Received:2012-10-30 Revised:2014-03-19 Online:2014-07-31 Published:2020-09-08

摘要/Abstract

摘要： 2012年6月30日新源-和静M_s6.6地震前后,新疆北天山地区的泥火山及温泉出现了明显的水化学异常。在地震前后4天内,采集了两批泥火山和温泉水样品,测定了泥火山和温泉水样的水化学参数。资料表明,泥火山喷溢水属于低温、弱碱性咸水或盐水,水化类型为CI-Na,来源于储存在封闭构造中并与干旱海相、河湖相沉围岩发生了漫长而复杂水岩作用的大气降水。温泉水为中温、弱碱性SO₄·CI-Na型淡水,形成于地表水沿断裂深循环过程中的水岩作用。安集海泥火山出现同震喷溢,震后泥水温度(T)、总矿化度(TDS)、K+、Na+及Ca2+大幅上升;独山子、白杨沟及AM02泥火山为震前喷溢,独山子、白杨沟泥火山表现为T.TDS、EC、Na+、CI的升高和K⁺、Ca²⁺、Mg²⁺的降低;AM02泥火山K⁺、Mg⁺明显降低,Ca²⁺上升达223%。震后沙湾25号泉T降低7℃, TDS、电导率(EC)、K⁺、Na⁺、 Ca²⁺、 .Mg²⁺、CI^-及$SO_{4}^{2-}$升高。研究结果可用于北天山地区的地震趋势分析和改进利用各泥火山、温泉进行北天山地区地震活动性监测的水化学方法。

关键词: 水化学, 泥火山, 温泉, 2012年新源—和静M_s6.6地震

Abstract: Hydrogeochemical anomalies of mud volcanoes and springs in the North Tians-han were found before and after the June 30,2012 Xinyuan-Hejing M_s6.6 earthquake in Xinjiang Uyger autonomous region, China. Water samples from the hot springs and mud volcanoes were collected 4-days before and after the earthquake, and hydrogeochemical par rameters were measured. The data indicate that water from mud volcanoes are brine with weak alkaline and low temperatures, whose chemical type is CI-Na and may originate from the meteoric water stored in the closed structures and react with the surrounding rock complex. Water from springs is fresh with weak alkaline and medium temperatures, whose chemical type is SO4·Cl-Na, probably owing to the deep circulation of the ground-water along the faults. The Anjihai mud volcano showed coseismic anomaly, with temper ature (T), total dissolved solids (TDS),K⁺,Na⁺ and Ca²⁺ increasing greatly after the . earthquake. Mud volcanoes in Dushanzi, Baiyanggou and Aiqigou showed pre-seismic a-nomaly, with the T, TDS, conductivity(EC),Na⁺ and CI^-increasing, and K⁺,Ca²⁺ and Mg²⁺ decreasing before the earthquake in Dushanzi and Baiyanggou mud volcanoes. In Aiqigou mud volcano, there were significantly decreases in K⁺ and Mg²⁺,but Ca²⁺ in-creased by 223%. For the Shawan No. 25 spring, there were significantly decreases in TDS, EC, K⁺,Na⁺,Ca²⁺,Mg²⁺, CI^-and $SO_{4}^{2-}$ but the temperature decreased by 7℃. These results may help earthqua ke tendency analysis and improvement of hydrogeochemi-cal monitoring methods.

Key words: Hydrogeochemical changes, Mud volcanoes, hot spring, The June 30, 2012 Xinyuan earthquake

中图分类号:

P315.7

陈志, 杜建国, 周晓成, 崔月菊, 刘雷, 李营, 张文来, 高小其, 许秋龙, 王海涛. 2012年6月30日新源M_s6.6地震前后北天山泥火山及温泉的水化学变化[J]. 地震, 2014, 34(3): 97-107.

CHEN Zhi, DU Jian-guo, ZHOU Xiao-cheng, CUI Yue-ju, LIU Lei, LI-Ying. Hydrogeochemical Changes of Mud V olcanoes and Springs in North Tianshan Related to the June 30,2012 Xinyuan M_s6.6 Earthquake[J]. EARTHQUAKE, 2014, 34(3): 97-107.

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