摘要
泥火山活动能够将地球深部的碳输送到大气圈,是地质碳排放和深部碳循环的重要形式。在全球变暖的背景下,定量化地研究泥火山活动对大气圈温室气体含量增加的贡献具有至关重要的意义。乌苏艾其沟泥火山位于新疆准噶尔盆地南缘,地处北天山山前凹陷带的北阿尔钦沟背斜轴部。本文中结合该领域国际先进的测试技术,基于月尺度监测新疆乌苏艾其沟泥火山温室气体宏渗漏规模,分析了2021年新疆尼勒克M_(S)4.2地震前后研究区气体组分的变化情况。结果显示:CH_(4)和CO_(2)气体通量在地震前有显著前兆异常,异常幅度约是背景值的2倍。通过对震前艾其沟泥火山温室气体排放通量前兆特征分析,可为该地区地震短临预报趋势研判提供重要的参考依据。
Many studies show deep-seated carbon could be transported from Eart h’ s interior into atmosphere by mud volcano activities,which play an important role in geologic carbon degassing.Under the background of global warming,it is of great significance to quantitatively study the contribution of mud volcano to the increase of greenhouse gas content in the atmosphere.Aiqigou mud volcano is located on the axis of North Aerqingou anticline in the northern Tianshan piedmont depression,which lies in the southern margin of Junggar Basin,northwestern China.Combined with the international advanced testing technology in this field,this paper analyzes the macro emission scale of greenhouse gases from Aiqigou mud volcano in Wusu every month.The change of gas flux in the study area before and after Nileke M_(S)4.2 earthquake in 2021 was analyzed.The results showed that CH_(4) and CO_(2) gas flux changed significantly before the earthquake,and the anomaly amplitude was 2 times of the average.Precursory characteristics of greenhouse gas emission flux from Aiqigou mud volcano before the earthquake can provide an important reference for the study and judgment of the short-term and imminent earthquake prediction trend in this area.
作者
麻荣
朱成英
李新勇
汪成国
刘建明
刘代芹
李杰
MA Rong;ZHU Cheng-ying;LI Xin-yong;WANG Cheng-guo;LIU Jian-ming;LIU Dai-qin;LI Jie(Earthquake Agency of Xinjiang Uygur Autonomous Region,Urumqi 830011,Xinjiang,China)
出处
《内陆地震》
2022年第3期218-226,共9页
Inland Earthquake
基金
地震科技星火计划项目(XH20066)
新疆地震科学基金(202117).
