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《地震研究》[ISSN:1000-0666/CN:53-1062/P]

卷:

期数:

2025年04期

页码:

623-630

栏目:

重力场及其变化观测与地球科学应用专辑

出版日期:

2025-05-01

文章信息/Info

Title:

Spatio-temporal Characteristics of the Gravity Field in the West Yunnan Earthquake Test Site Area before and after the Lijiang M_S7.0 Earthquake in 1996

作者:

王斌¹; 黄江培²; 杨雄¹; 祝意青¹; 隗寿春¹; 李岩¹; 徐佰翔¹; 刘蜀¹; 苏晓明¹

(1.中国地震局第二监测中心,陕西 西安 710054; 2.云南省地震局,云南 昆明 650224)

Author(s):

WANG Bin¹; HUANG Jiangpei¹; YANG Xiong¹; ZHU Yiqing¹; WEI Shouchun¹; LI Yan¹; XU Baixiang¹; LIU Shu¹; SU Xiaoming¹

(1.Second Crust Monitoring and Application Center,China Earthquake Administration,Xi'an 710054,Shaanxi,China)(2.Yunnan Earthquake Agency,Kunming 650224,Yunnan,China)

关键词:

滇西地震预报实验场;  丽江M_S7.0地震;  重力场;  时变特征

Keywords:

the West Yunnan Earthquake Test Site;  the Lijiang M_S7.0 earthquake;  gravity field;  time-varing characteristics

分类号:

P315.726

DOI:

10.20015/j.cnki.ISSN1000-0666.2025.0063

摘要:

利用1989—1996年滇西地震预报实验场绝对重力和相对重力观测资料,采用逐年差分和多年累积的方法,分析滇西地震预报实验场内部不同时间尺度的重力场演变特征及其与丽江地震在时空上的对应关系,结果表明:①1992年以前,研究区内部重力场变化平稳,1993年出现局部变化,1995年变化急剧加大,震后快速反向调整,变化量值基本与震前多年累积相当,重力场演化特征与丽江地震存在高度时空对应关系,表明该时段重力场变化为丽江地震的孕震特征。②研究区差分及累积重力场动态演化过程中,在川滇菱形块体与滇西块体边界产生重力变化梯度带,表明这2个块体构造活动剧烈。③沿红河断裂带出现(-60～90)×10^-8 m/s²的重力变化高梯度带,其走向与红河断裂构造高度一致,反映区域重力场变化受主要活动构造控制,是地下深部壳幔物质运移的表现。

Abstract:

Based on the results from the absolute gravity measurement and the relative gravity measurement in the period 1989-1996,the gravity field characteristics in the West Yunnan Earthquake Test Site area in different time scales and the gravity's spatio-temporal correspondence with the 1996 Lijiang M_S7.0 earthquake were analyzed by the method of year-by-year differential and years of accumulation.The results reveal that:① Before 1992,the gravity field in the study area changed steadily,and there were partial changes in 1993.In 1995,the alteration increased rapidly and readjusted conversely after the Lijiang earthquake.The variation amplitude was basically equivalent to the accumulated values prior to the earthquake.The variation of the gravity field was spatially and temporally corresponded with the Lijiang earthquake,which demonstrated the seismogenesis of the Lijiang earthquake.② A gravity gradient zone was generated along the boundary between the Sichuan-Yunnan rhombic block and the western Yunnan block during the dynamic evolution of the gravity field differential and cumulation,indicating intense tectonic activity along both blocks; ③ A high gravity gradient zone which was highly consistent with the strike of the Red River fault appeared,with the value of-60×10^-8 m/s² to the value of 90×10^-8 m/s².This reflects that the changes in the regional gravity field are controlled by the main active structures and this unveils the migration of the deep Crust-Mantle material.

参考文献/References:

顾功叙,刘克人,郑金涵,等.1997.中国京津唐张地区时间上连续的重力变化与地震的孕育和发生[J].科学通报,42(18):1919-1930.
Gu G X,Liu K R,Zheng J H,et al.1997.Continuous gravity changes and earthquakes occur in the time of Beijing,Tianjin,Tangshan and Zhangjiakou regions of China[J].Chinese Science Bulletin,42(18):1919-1930.(in Chinese)
胡敏章,郝洪涛,李辉,等.2019.地震分析预报的重力变化异常指标分析[J].中国地震,35(3):417-430.
Hu M Z,Hao H T,Li H,et al.2019.Quantitation analysis of gravity changes for earthquake prediction[J].Earthquake Research in China,35(3):417-430.(in Chinese)
黄江培,曹颖,刘东,等.2022.漾濞M_S6.4地震前后的重力变化特征及其孕震含义分析[J].地震地质,44(6):1557-1573.
Huang J P,Cao Y,Liu D,et al.2022.Analysis of gravity variation characteristics and seismogenic meaning before and after Yangbi M_S6.4 earthquake[J].Seismology and Geology,44(6):1557-1573.(in Chinese)
贾民育,邢灿飞,孙少安.1995.滇西重力变化的二维图象及其与5级(M_S)以上地震的关系[J].地壳形变与地震,15(3):9-19.
Jia Y M,Xing C F,Sun S A.1995.Two dimensional image of gravity variation in western Yunnan and its relationship with earthquakes of magnitude 5(M_S)or above[J].Crustal Deformation And Earthquake,15(3):9-19.(in Chinese)
李树鹏,胡敏章,祝意青,等.2024.不同类型地震震级与重力变化异常的统计特征及其机理分析[J].地球物理学报,67(8):3032-3059.
Li S P,Hu M Z,Zhu Y Q,et al.2024.Statistics relationship between earthquake magnitude and gravity changes and their mechanism analysis of different categories of earthquakes[J].Chinese Journal of Geophysics,67(8):3032-3059.(in Chinese)
申重阳,李辉,付广裕.2003.丽江7.0级地震重力前兆模式研究[J].地震学报,25(2):163-171.
Shen C Y,Li H,Fu G Y.2003.Study on a gravity precursor mode of Lijiang earthquake with M_S=7.0[J].Acta Seismologica Sinica,25(2):163-171.(in Chinese)
苏生瑞,王运生,王士天.2004.丽江地震区应力场研究[J].地质论评,50(1):57-64.
Su S R,Wang Y S,Wang S T.2004.A study on the stress field in the region of the Lijiang earthquake[J].Geological Review,50(1):57-64.(in Chinese)
孙和平.2004.重力场的时间变化与地球动力学[J].中国科学院院刊,19(3):189-193.
Sun H P.2004.Time variation of gravity field and geodynamics[J].Bulletin of Chinese Academy of Sciences,19(3):189-193.(in Chinese)
王绍晋,龙晓帆,罗淑进.1997.丽江地震序列的震源机制,发震应力场和破裂特征[J].地震研究,20(1):26-34.
Wang S J,Long X F,Luo S J.1997.The focal mechanism,seismogenic stress field and rupture characteristics of the Lijiang earthquake sequence[J].Journal of Seismological Research,20(1):26-34.(in Chinese)
王勇,张为民,詹金刚,等.2004.重复绝对重力测量观测的滇西地区和拉萨点的重力变化及其意义[J].地球物理学报,47(1):95-100.
Wang Y,Zhang W M,Zhan J G,et al.2004.Gravity change detected by repeated absolute gravity measurements in the western Yunnan and Lhasa,China and its implication[J].Chinese Journal of Geophysics,47(1):95-100.(in Chinese)
王运生,王士天,李渝生.2000.丽江7.0级大震发震机制新见[J].西北地震学报,22(4):442-446.
Wang Y S,Wang S T,Li Y S.2000.A new idea on the mechanism of Lijiang M_S7.0 earthquake[J].Northwestern Seismological Journal,22(4):442-446.(in Chinese)
吴中海,龙长兴,范桃园,等.2015.青藏高原东南缘弧形旋扭活动构造体系及其动力学特征与机制[J].地质通报,34(1):1-31.
Wu Z H,Long C X,Fan T Y,et al.2015.The arc rotational-shear active tectonic system on the southeastern margin of Tibet Plateau and its dynamic characteristics and mechanism[J].Geological Bulletin,34(1):1-31.(in Chinese)
玄松柏,申重阳,李辉.2010.丽江7.0级地震前后地壳密度动态变化三维反演[J].大地测量与地球动力学,30(1):14-20.
Xuan S B,Shen C Y,Li H.2010.On 3D Inversion for crustal density change before and after Lijiang M_S7.0 earthquake[J].Journal of Geodesy and Geodynamics,30(1):14-20.(in Chinese)
杨雄,祝意青,赵云峰,等.2023.2021年漾濞M_S6.4地震前后重力场动态特征分析[J].地震学报,45(5):863-874.
Yang X,Zhu Y Q,Zhao Y F,et al.2023.Analysis of dynamic characteristics of gravity field before and after the 2021 Yangbi M_S6.4 earthquake[J].Acta Seismologica Sinica,45(5):863-874.(in Chinese)
祝意青,李铁明,郝明,等.2016.2016年青海门源M_S6.4地震前重力变化[J].地球物理学报,59(10):3744-3752.
Zhu Y Q,Li T M,Hao M,et al.2016.Gravity changes before the 2016 Mengyuan M_S6.4 earthquake in Qinghai Province[J].Chinese Journal of Geophysics,59(10):3744-3752.(in Chinese)
祝意青,梁伟锋,湛飞并,等.2012.中国大陆重力场动态变化研究[J].地球物理学报,55(3):804-813.
Zhu Y Q,Liang W F,Zhan F B,et al.2012.Study on the dynamic change of gravity field in China continent[J].Chinese Journal of Geophysics,55(3):804-813.(in Chinese)
祝意青,梁伟锋,赵云峰,等.2017.2017年四川九寨沟M_S7.0地震前区域重力场变化[J].地球物理学报,60(10):4124-4131.
Zhu Y Q,Liang W F,Zhao Y F,et al.2017.Gravity changes before the Jiuzhaigou,Sichuan,M_S7.0 earthquake of 2017[J].Chinese Journal of Geophysics,60(10):4124-4131.(in Chinese)
祝意青,刘芳,张国庆,等.2022.中国流动重力监测与地震预测[J].武汉大学学报(信息科学版),47(6):820-829.
Zhu Y Q,Liu F,Zhang G Q,et al.2022.Mobile gravity monitoring and earthquake prediction in China[J].Geomatics and Information Science of Wuhan University,47(6):820-829.(in Chinese)
祝意青,申重阳,张国庆,等.2018.我国流动重力监测预报发展之再思考[J].大地测量与地球动力学,38(5):441-446.
Zhu Y Q,Shen C Y,Zhang G Q,et al.2018.Rethinking the development of earthquake monitoring and prediction in mobile gravity[J].Journal of Geodesy and Geodynamics,38(5):441-446.(in Chinese)
祝意青,闻学泽,孙和平,等.2013.2013年四川芦山M_S7.0地震前的重力变化[J].地球物理学报,56(6):1887-1894.
Zhu Y Q,Wen X Z,Sun H P,et al.2013.Gravity changes before the Lushan,Sichuan M_S=7.0 earthquake of 2013[J].Journal of Geophysics,56(6):1887-1894.(in Chinese)
祝意青,徐云马,吕弋培,等.2009.龙门山断裂带重力变化与汶川8.0级地震关系研究[J].地球物理学报,52(10):2538-2546.
Zhu Y Q,Xu Y M,Lyu Y P,et al.2009.Relations between gravity variation of the Longmenshan fault zone and the Wenchuan M8.0 earthquake[J].Chinese Journal of Geophysics,52(10):2538-2546.(in Chinese)

备注/Memo

备注/Memo:

收稿日期:2024-10-27.
基金项目:国家自然科学基金(42374104,41874092); 陕西省自然基金(2024JC-YBMS-203); 云南省地震局地震科技专项(20242X03).
第一作者简介:王 斌(1990-),工程师,主要从事重力测量、地球重力场变化研究.E-mail:278802849@qq.com.
通信作者简介:黄江培(1984-),高级工程师,主要从事利用重力数据采集及资料分析应用工作.E-mail:164909307@qq.com.[TS)]

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更新日期/Last Update: 2025-05-01