«上一篇/Previous Article|本期目录/Table of Contents|下一篇/Next Article»

HTML)

《地震研究》[ISSN:1000-0666/CN:53-1062/P]

卷:: 47
期数:: 2024年02期

页码:: 245-252

栏目:

出版日期:: 2024-06-01

文章信息/Info

Title:: Study on Deep Electrical Structure Characteristics of the Shulan Section of the Yilan-Yitong Fault Zone

作者:: 操聪¹; 2; 赵凌强^2; 齐彦福¹; 吕宏斌²; 郑勇²; 杨雄²; (1.长安大学地质工程与测绘学院,陕西西安 710054; 2.中国地震局第二监测中心,陕西西安 710043)

Author(s):: CAO Cong¹; 2; ZHAO Lingqiang²; QI Yanfu¹; LU Hong Bin²; ZHENG Yong²; YANG Xiong²; (1.School of Geological Engineering and Geomatics,Chang’an Univesity,Xi’an 710054,Shaanxi,China)(2.The Second Monitoring and Application Center,China Earthquake Administration,Xi’an 710043,Shaanxi,China)

关键词:: 大地电磁; 电性结构; 依兰—伊通断裂; 舒兰段

Keywords:: hot spring; chemical composition of water; hydrogen and oxygen isotope; the Quannan-Xunwu fault zone

分类号:: P315.2

DOI:: 10.20015/j.cnki.ISSN1000-0666.2024.0018

摘要:: 依兰—伊通断裂带是划分我国中蒙和中朝2个活动地块的重要边界断裂,也是东北地区规模最大的断裂系统,以往研究认为该断裂活动较弱,但该断裂舒兰段在全新世有过强烈活动。针对这一问题,2021年在穿过依兰—伊通断裂带舒兰段位置布设了一条大地电磁剖面,对所获取的14个宽频测点数据进行了精细化处理和二维反演,获得了断裂带及其两侧地块的深部电性结构特征。结果表明:依兰—伊通断裂带舒兰段及其邻近地区电性结构表现为东西横向分块的特点,其中主断裂呈现延伸至中下地壳的中低阻条带,强度较弱,其东西两侧为高阻,强度较强。结合中国大陆其他活动断裂区的大地电磁探测结果,推测依兰—伊通断裂带舒兰段的电性结构分布特点有利于断层活动和形变累积,未来需要注意其地震孕育的风险。

Abstract:: The Yilan-Yitong fault zone is an important boundary of the China-Mongolia active block and the China-Korea active block,and it is the largest fault system in Northeast China.The latest research results show that the Shulan segment of the Yilan-Yitong fault zone was intensively active in the Holocene,which challenges the previous conclusion that the fault activity in the Holocene was weak.In this paper,a broadband magnetotelluric profile data obtained at 14 measuring sites across the Shulan section of the Yilan-Yitong fault zone have been refined and inversed in 2D space,and the characteristics of the deep electrical structure along the Shulan section of the Yilan-Yitong fault zone have been obtained.The characteristics of the deep electrical structure of the blocks on both sides of the Shulan section have been obtained too.The results show that the electrical structure of the Shulan section and its adjacent areas is characterized by East-West lateral blocking; the main fault of the Shulan section is embeded in the unstable medium-low-resistivity bands extending to the middle-lower-crust,on east side and west side of the Shulan section there exist the high-resistivity bodies.Referring to the magnetotelluric detection results of other active-fault areas in Chinese Mainland,we speculate that the electrical structure feature of the Shulan section is conductive to stress accumulation and faulting.There exists earthquake risk in this area in the future.

参考文献/References:

蔡军涛,陈小斌.2010.大地电磁资料精细处理和二维反演解释技术研究(二)——反演数据极化模式选择[J].地球物理学报,53(11):2703-2714.
Cai J T,Chen X B.2010.Refined techniques for data processing and two-dimensional inversion in magnetotelluricⅡ:which data polarization mode should be used in 2D inversion?[J].Chinese Journal of Geophysics,53(11):2703-2714.(in Chinese)
操聪,赵凌强,党昊,等.2022.内蒙古狼山山前断裂中段大地电磁探测研究[J].大地测量与地球动力学,42(9):976-979.
Cao C,Zhao L Q,Dang H,et al.2022.Study on magnetotelluric detection of the middle section of Langshan piedmont fault in inner Mongolia[J].Journal of Geodesy and Geodynamics,42(9):976-979.(in Chinese)
陈乐寿,王光锷.1990.大地电磁测深法[M].北京:地质出版社,10-15.
Chen L S,Wang G E.1990.Magnetotelluric sounding[M].Beijing:Geological Publishing House,10-15.(in Chinese)
陈小斌,赵国泽,詹艳.2004.MT资料处理与解释的Windows可视化集成系统[J].石油地球物理勘探,39(Sl):11-16.
Chen X B,Zhao G Z,Zhan Y.2004.A visual integrated windows system for MT data processing and interpretation[J].Oil Geophysical Prospecting,39(S1):11-16.(in Chinese)
邓起东,张培震,冉勇康,等.2003.中国活动构造与地震活动[J].地学前缘,10(S1):66-73.
Deng Q D,Zhang P Z,Ran Y K,et al.2003a.Active tectonics and earthquake activities in China[J].Earth Science Frontiers,10(S1):66-73.(in Chinese)
荆凤,申旭辉,洪顺英,等.2006.基于遥感技术研究依兰伊通断裂带[J].地震,26(3):79-84.
Jing F,Shen X H,Hong S Y,et al.2006.A study on Yilan-Yitong fault zone based on remote sensing technology[J].Earthquake,26(3):79-84.(in Chinese)
闵伟,焦德成,周本刚,等.2011.依兰—伊通全新世活动的新发现及其意义[J].地震地质,33(1):74-79.
Min W,Jiao D C,Zhou B G,et al.2011.The significance of discovery on Holocene activity on the Yilan-Yitong fault in northeast china[J].Seismology and Geology,33(1):74-79.(in Chinese)
疏鹏,闵伟,刘玉刚,等.2014.依兰—伊通断裂方正段晚第四纪以来的构造活动及其地貌表现[J].震灾防御技术,9(2):226-237.
Shu P,Min W,Liu Y G,et al.2014.Tectonic activity and geomorphic features of the Fangzheng section of Yilan-Yitong fault in the late quaternary period[J].Technology for Earthquake Disaster Prevention,9(2):226-237.(in Chinese)
余中元,张培震,闵伟,等.2016.依舒断裂尚志段晚全新世以来的强震复发间隔:来自古地震与历史文献的约束[J].地震地质,38(4):844-861.
Yu Z Y,Zhang P Z,Min W,et al.2016.Lake Holocene average recurrence interval of great earthquakes of shangzhi part of the Yilan-Yitong fault zone,nechina:Constraints from paleo-earthquakes and historical written records[J].Seismology and Geology,38(4):844-861.(in Chinese)
詹艳,梁明剑,孙翔宇,等.2021.2021年5月22日青海玛多M_S7.4地震深部环境及发震构造模式[J].地球物理学报,64(7):2232-2252.
Zhan Y,Liang M J,Sun X Y,et al.2021.Deep structure and seismogenic pattern of the 2021.5.22 Maduo(Qinghai)M_S7.4 earthquake[J].Chinese Journal of Geophysics,64(7):2232-2252.(in Chinese)
赵凌强,孙翔宇,詹艳,等.2022a.2022年1月8日青海门源M_S6.9级地震孕震环境和冷龙岭断裂分段延展特征[J].地球物理学报,65(4):1536-1546.
Zhao L Q,Sun X Y,Zhan Y,et al.2022a.The seismogenic model of Menyuan M_S6.9 earthquake on January 8,2022,Qinghai Province and segmented extensional characteristic of the Lenglongling fault[J].Chinese Journal of Geophysics,65(4):1536-1546.(in Chinese)
赵凌强,詹艳,孙翔宇,等.2019.利用大地电磁技术揭示2016年1月21日青海门源M_S6.4地震隐伏地震构造和孕震环境[J].地球物理学报,62(6):2088-2100.
Zhao L Q,Zhan Y,Sun X Y,et al.2019.The hidden seismogenic structure and dynamic environment of the 21 january Menyuan,Qinghai,M_S6.4 earthquake derived from magnetotelluric imaging[J].Chinese Journal of Geophysics,62(6):2088-2100.(in Chinese)
赵凌强,詹艳,王庆良,等.2020.祁连山东端冷龙岭隆起及邻区深部电性结构与孕震构造背景[J].地球物理学报,63(3):1013-1025.
Zhao L Q,Zhan Y,Wang Q L,et al.2020a.The deep electrical structure and seismogenic background of Lenglongling uplift and its adjacent areas in the eastern and of Qilian Mountains[J].Chinese Journal of Geophysics,63(3):1013-1025.(in Chinese)
赵凌强,詹艳,王庆良,等.2022b.大地电磁数据揭示的1303年洪洞8级地震区精细结构和孕震环境[J].地震地质,44(3):686-700.
Zhao L Q,Zhan Y,Wang Q L,et al.2022b.The seismogenic structure of the 1303 Hongtong M8 earthquake inferred from magnetotelluric imaging[J].Seismology and Geology,44(3):686-700.(in Chinese)
Bibby H M,Caldwell T G,Brown C.2005.Determinable and non-determinable parameters of galvanic distortion in magnetotellurics[J].Geophys,163:915-930.
Cai J T,Chen X B,Xu X W,et al.2017.Rupture mechanism and seismotectonics of the M_S6.5 Ludian earthquake inferred from three-dimensional magnetotelluric imaging[J].Geophys,44:1275-1285.
Caldwell T G,Bibby H M,Brown C,et al.2004.The magnetotelluric phase tensor[J].Geophys J Int,158:457-469.
Gu C C,Zhu G,Zhang M T,et al.2016.Features and origin timeof Mesozoic strike-slip structures in the Yilan-Yitong Fault Zone[J].ChinEarth Sci,59:2389-2410.
Gu C,Zhu G,Zhang S,et al.2017.Cenozoic evolution of the Yilan-Yitong graben in NE China:an example of graben formation controlled by pre-existing structures[J].Journal of Asian Earth Sciences,146:168-184.
Heise W,Caldwell T G,Bibby H M,et al.2008.Three-dimensional modelling of magnetotelluric data from the Rotokawa geothermal field,Taupo Volcanic Zone,New Zealand[J].Geophys J Int,173:740-750.
Min W,Liu Y G,Jiao D C,et al.2013.Evidence for Holocene activity of the Yilan-Yitong fault,northeastern section of the Tan-Lu fault zone in northeast China[J].Journal of Asian Earth Sciences,2:207-216.
Yu Z Y,Yin N,Shu P,et al.2018.Late Quaternary paleoseismicity and seismic potential of the Yilan-Yitong fault zone in NE China[J].Journal of Asian Earth Sciences,151:197-225.
Yu Z,Zhang P,Min W,et al.2017.Late Holocene slip rate and average recurrence interval of great earthquakeson the Shangzhi segment of the Yilan-Yitong fault zone,northeastern China:Constraints from paleo-earthquakes and historical written records[J].Island Arc,e12231.
Zhao G Z,Unsworth M J,Zhan Y,et al.2012.Crustal structure and rheology of the Longmenshan and Wenchuan M_W7.9 earthquake epicentral area from magnetotelluric data[J].Geology,40(12):1139-1142.
Zhu G,Hu W,Song L S,et al.2015.Quaternary activity along the Tan-Lu fault zone in the BohaiBay,East China:Evidence from seismic profiles[J].Journal of Asian Earth Sciences,114:5-17.

备注/Memo

备注/Memo:: 收稿日期:2022-10-24.
基金项目:国家自然科学基金(U1939205,41874092); 地震动力学国家重点实验室开放基金(LED2019B06,LED2021B04); 山西太原大陆裂谷动力学国家野外科学观测研究站项目(NORSTY20-07).
第一作者简介:操聪(1988-),工程师,主要从事地电场数据质量监控和大地电磁方法研究.E-mail:caocongccc@163.com.
通信作者简介:赵凌强(1988-),高级工程师,博士,主要从事大地电磁方法在深部构造探测中的应用.E-mail:zhaolingqiang0926@126.com.

更新日期/Last Update: 2024-03-20

《地震研究》[ISSN:1000-0666/CN:53-1062/P]

文章信息/Info

参考文献/References:

备注/Memo

常用功能

导航/Navigate

工具/Tools

统计/Statistics