1.中国地质大学(武汉)地理与信息工程学院,湖北 武汉,430074
2.武汉大学测绘遥感信息工程全国重点实验室,湖北 武汉,430079
3.中国科学院精密测量科学与技术创新研究院,湖北 武汉,430077
吴云龙,教授,研究方向为重力反演及地球深部构造。wuyunlong@cug.edu.cn
储日升,博士,研究员。chur@apm.ac.cn
收稿:2025-03-08,
纸质出版:2025-11-05
移动端阅览
吴云龙,李好,张帆,等.西藏定日县Ms 6.8地震深部构造特征与孕震环境分析[J].武汉大学学报(信息科学版),2025,50(11):2163-2175.
WU Yunlong,LI Hao,ZHANG Fan,et al.Analysis of Deep Tectonic Characteristics and Seismogenic Environment of the Ms 6.8 Earthquake in Dingri, Xizang, China[J].Geomatics and Information Science of Wuhan University,2025,50(11):2163-2175.
吴云龙,李好,张帆,等.西藏定日县Ms 6.8地震深部构造特征与孕震环境分析[J].武汉大学学报(信息科学版),2025,50(11):2163-2175. DOI:10.13203/j.whugis20250052
WU Yunlong,LI Hao,ZHANG Fan,et al.Analysis of Deep Tectonic Characteristics and Seismogenic Environment of the Ms 6.8 Earthquake in Dingri, Xizang, China[J].Geomatics and Information Science of Wuhan University,2025,50(11):2163-2175. DOI:10.13203/j.whugis20250052
2025-01-07,在西藏日喀则定日县发生了Ms 6.8地震,此次地震震级高、烈度大,是该地区近年来发生的最大规模地震事件。地震的发生是地球内部能量释放的复杂过程,其成因主要与板块运动、地质构造活动以及深部构造特征和动力学环境等因素密切相关。为进一步探究定日县及周边地区地震活动性规律、提高区域地震风险防控能力,亟需在研究区域开展动力学过程和孕震环境的研究。基于XGM2019e全球重力场模型,采用重力均衡分析、小波多尺度分析和三维地壳密度结构反演等方法,分析了发震区域地壳密度结构和动力学过程。研究显示,震源区及周边地区布格重力异常呈现显著的负异常状态,其异常值介于-653~-101 mGal之间。研究区域南北走向断裂处于不均衡状态,地壳活动性较为强烈。地壳内部出现大量的南北向高密度异常区域,佐证了在印度-欧亚板块持续挤压的背景下,块体内部发生大规模的东西向伸展变形。因此,青藏高原南部地区地震多发态势主要受控于板块挤压诱发的深部物质运移与地壳内部东西向伸展变形,这种多尺度动力学过程共同构成了该区域的孕震环境。
Objectives
2
This study aims to investigate the deep tectonic characteristics and seismogenic environment of the 2025 Dingri Ms 6.8 earthquake in Tibet. By analyzing crustal density structures and dynamic processes using gravity data
the research seeks to enhance understanding of seismic activity patterns in the region. Specifically
it focuses on deciphering how Indian-Eurasian plate interactions
combined with intraplate deformation
contribute to the formation of seismogenic zones. The findings aim to provide critical insights for improving regional earthquake hazard assessment and mitigation strategies in the seismically active southern Tibetan Plateau.
Methods
2
The research utilizes the XGM2019e global gravity field model and shuttle radar topography mission 3 digital elevation data to compute Bouguer gravity anomalies. Gravity isostatic equilibrium analysis
based on the Airy model
is applied to evaluate crustal balance and derive Moho depths. Wavelet multi-scale decomposition is employed to separate gravitational signals at different depths
enabling identification of shallow and deep-seated density anomalies. A three-dimensional crustal density inversion
constrained by CRUST1.0 model data
is performed to resolve fine-scale density variations. These methods collectively allow for a comprehensive analysis of crustal structure
fault activity
and material migration processes.
Results
2
Key results reveal pronounced negative Bouguer gravity anomalies (-653 to -101 mGal) in the epicentral region
indicative of thickened crust and significant crustal heterogeneity. Wavelet analysis identifies active north-south trending faults
such as the Dengmecuo Fault
as zones of high gravitational gradient
coinciding with aftershock clusters. Gravity isostatic equilibrium calculations show disequilibrium along north-south faults
with large negative residual forces (-20 to -10 MPa)
suggesting ongoing crustal sinking and mantle-crust interactions. Three-dimensional density inversion highlights north-south oriented high-density anomalies in the upper crust
corroborating east-west extensional deformation driven by plate convergence. The seismogenic zone at 10 km depth exhibits mixed high/low density structures
aligning with fault zones and stress accumulation areas.
Conclusions
2
The study concludes that the Dingri earthquake was triggered by complex interactions between Indian-Eurasian plate collision and intraplate east-west extension. The persistent northward extrusion of the Indian Plate induces deep material migration
creating structural weaknesses along north-south faults. These faults
in a state of disequilibrium
facilitate stress accumulation and sudden release
leading to seismic events. The identified high-density anomalies in the crust reflect tectonic stretching and gravitational instability
further enhancing seismic potential. These findings underscore the importance of integrating multi-scale gravity analysis with structural geology to unravel seismogenic mechanisms in collision zones. The results provide a scientific basis for refining earthquake hazard models and developing targeted mitigation strategies in southern Tibet.
王楠 , 李永生 , 申文豪 , 等 . 2025年1月7日西藏定日Ms 6.8地震震源机制InSAR反演及强地面运动快速模拟 [J]. 武汉大学学报 (信息科学版) , 2025 , 50 ( 2 ): 404 - 411 .
WANG Nan , LI Yongsheng , SHEN Wenhao , et al . Source Parameters and Rapid Simulation of Strong Ground Motion of the Ms 6.8 Earthquake on January 7, 2025 in Dingri (Xizang,China) Derived from InSAR Observation [J]. Geomatics and Information Science of Wuhan University , 2025 , 50 ( 2 ): 404 - 411 .
肖懿思 , 方荣新 , 李瑜 , 等 . 利用高频GNSS观测研究2025年西藏定日Ms 6.8地震地表形变及预警震级 [J]. 武汉大学学报 (信息科学版) , 2025 , DOI: 10.13203/j.whugis20250049 http://dx.doi.org/10.13203/j.whugis20250049 .
XIAO Yisi , FANG Rongxin , LI Yu , et al . Surface Displacement and Early Warning Magnitude of the 2025 Dingri, Xizang Ms 6.8 Earthquake Using High-Rate GNSS Observations [J]. Geomatics and Information Science of Wuhan University , 2025 , DOI: 10.13203/j.whugis20250049 http://dx.doi.org/10.13203/j.whugis20250049 .
白玲 , 陈治文 , 王绍俊 . 2025年西藏定日6.8级地震: 构造背景分析与震源特征探讨 [J]. 地球与行星物理论评(中英文) , 2025 , 56 ( 3 ): 258 - 263 .
BAI Ling , CHEN Zhiwen , WANG Shaojun . The 2025 Dingri Ms 6.8 Earthquake in Xizang: Analysis of Tectonic Background and Discussion of Source Characteristics [J]. Reviews of Geophysics and Planetary Physics , 2025 , 56 ( 3 ): 258 - 263 .
铁永波 , 高云建 , 张宪政 , 等 . 西藏定日县Ms 6.8级地震区地质灾害发育规律与减灾对策研究 [J]. 沉积与特提斯地质 , 2025 , 40 ( 1 ): 212 - 224 .
TIE Yongbo , GAO Yunjian , ZHANG Xianzheng , et al . Study on the Development Laws and Mitigation of Geological Hazards in Dingri Ms 6.8 Earthquake Region, Xizang Autonomous Region [J]. Sedimentary Geology and Tethyan Geology , 2025 , 40 ( 1 ): 212 - 224 .
谭莎莎 , 杨莹辉 , 许强 , 等 . 2025年1月7日西藏定日县Ms 6.8级强震地表同震形变特征与房屋建筑震损分析 [J]. 成都理工大学学报(自然科学版) , 2025 , 52 ( 2 ): 212 - 222 .
TAN Shasha , YANG Yinghui , XU Qiang , et al . Coseismic Deformation and Seismic Damage Assessment of Buildings from the Ms 6.8 Earthquake in Dingri, Xizang, on January 7, 2025 [J]. Journal of Chengdu University of Technology(Science & Technology Edition) , 2025 , 52 ( 2 ): 212 - 222 .
李莹 , 田建慧 , 李心怡 , 等 . 2022年9月5日四川泸定Ms 6.8地震深部构造特征 [J]. 地球物理学报 , 2023 , 66 ( 4 ): 1385 - 1396 .
LI Ying , TIAN Jianhui , LI Xinyi , et al . Deep Tectonic Pattern of the Luding Ms 6.8 Earthquake on 5th September 2022 in Sichuan Province, China [J]. Chinese Journal of Geophysics , 2023 , 66 ( 4 ): 1385 - 1396 .
王泽 , 吴云龙 , 张毅 , 等 . 巴东-秭归地区地壳密度反演及其构造特征 [J]. 武汉大学学报(信息科学版) , 2020 , 45 ( 11 ): 1763 - 1770 .
WANG Ze , WU Yunlong , ZHANG Yi , et al . Crustal Density Inversion and Its Tectonic Structure in Badong-Zigui Area [J]. Geomatics and Information Science of Wuhan University , 2020 , 45 ( 11 ): 1763 - 1770 .
曾华霖 . 重力场与重力勘探 [M]. 北京 : 地质出版社 , 2005 .
ZENG Hualin . Gravity Field and Gravity Exploration [M]. Beijing : Geological Publishing House , 2005 .
KUSKY T M , MENG J N . Perspectives on the M 7.1 2025 Southern Tibetan Plateau (Xizang) Earthquake [J]. Journal of Earth Science , 2025 , 36 ( 2 ): 843 - 846 .
滕吉文 , 司芗 , 王谦身 , 等 . 青藏高原地球科学研究中的核心问题与理念的厘定 [J]. 地球物理学报 , 2015 , 58 ( 1 ): 103 - 124 .
TENG Jiwen , SI Xiang , WANG Qianshen , et al . Collation and Stipulation of the Core Science Problems and Theoretical Concept in the Geoscience Study on the Tibetan Plateau [J]. Chinese Journal of Geophysics , 2015 , 58 ( 1 ): 103 - 124 .
梁生贤 , 王绪本 , 徐铮伟 , 等 . 重力异常揭示印度大陆地幔岩石圈在喜马拉雅东部之下陡俯冲 [J]. 中国科学: 地球科学 , 2023 , 53 ( 9 ): 2018 - 2034 .
LIANG Shengxian , WANG Xuben , XU Zhengwei , et al . Steep Subduction of the Indian Continental Mantle Lithosphere Beneath the Eastern Himalaya Revealed by Gravity Anomalies [J]. Scientia Sinica (Terrae) , 2023 , 53 ( 9 ): 2018 - 2034 .
ARMIJO R , TAPPONNIER P , MERCIER J L , et al . Quaternary Extension in Southern Tibet: Field Observations and Tectonic Implications [J]. Journal of Geophysical Research: Solid Earth , 1986 , 91 ( B14 ): 13803 - 13872 .
ENGLAND P , HOUSEMAN G . Extension During Continental Convergence, with Application to the Tibetan Plateau [J]. Journal of Geophysical Research: Solid Earth , 1989 , 94 ( B12 ): 17561 - 17579 .
AN Y , KAPP P A , MURPHY M A , et al . Significant Late Neogene East-West Extension in Northern Tibet [J]. Geology , 1999 , 27 ( 9 ): 787 .
李楠 , 刘陇强 , 朱利东 , 等 . 喜马拉雅北缘丁木错地堑第四纪软沉积物变形构造 [J]. 成都理工大学学报(自然科学版) , 2024 , 51 ( 6 ): 1048 - 1056 .
LI Nan , LIU Longqiang , ZHU Lidong , et al . Quaternary Soft-Sediment Deformation Structures in the Dingmucuo Graben, Northern Himalaya [J]. Journal of Chengdu University of Technology (Science & Technology Edition) , 2024 , 51 ( 6 ): 1048 - 1056 .
ELLIOTT J R , WALTERS R J , ENGLAND P C , et al . Extension on the Tibetan Plateau: Recent Normal Faulting Measured by InSAR and Body Wave Seismology [J]. Geophysical Journal International , 2010 , 183 ( 2 ): 503 - 535 .
田婷婷 , 吴中海 . 西藏申扎-定结裂谷南段丁木错正断层的最新史前大地震事件及其地震地质意义 [J]. 地质论评 , 2023 , 69 ( S1 ): 53 - 55 .
TIAN Tingting , WU Zhonghai . The Latest Prehistoric Earthquake Event of Dingmucuo Normal Fault in the Southern Section of Shenzha-Dingjie Rift in Tibet and Its Seismic Geological Significance [J]. Geological Review , 2023 , 69 ( S1 ): 53 - 55 .
庞琪沛 , 吴云龙 , 徐景田 , 等 . 甘肃积石山Ms 6.2地震深部构造特征和动力学过程 [J]. 武汉大学学报(信息科学版) , 2025 , 50 ( 2 ): 356 - 367 .
PANG Qipei , WU Yunlong , XU Jingtian , et al . Deep Structural Characteristics and Dynamic Processes of the Ms 6.2 Jishishan Earthquake and Its Adjacent Areas [J]. Geomatics and Information Science of Wuhan University , 2025 , 50 ( 2 ): 356 - 367 .
ZINGERLE P , PAIL R , GRUBER T , et al . The Combined Global Gravity Field Model XGM2019e [J]. Journal of Geodesy , 2020 , 94 ( 7 ): 66 .
Farr T G , Rosen P A , Caro E , et al . The Shuttle Radar Topography Mission [J]. Reviews of Geophysics , 2007 , 45 ( 2 ).
庞琪沛 , 吴云龙 , 张毅 , 等 . 淮北及邻区地壳均衡异常与构造背景 [J]. 地球物理学报 , 2024 , 67 ( 9 ): 3341 - 3356 .
PANG Qipei , WU Yunlong , ZHANG Yi , et al . Isostasic Anomaly and Tectonic Background in Huaibei City, Anhui and Its Adjacent Areas [J]. Chinese Journal of Geophysics , 2024 , 67 ( 9 ): 3341 - 3356 .
冯锐 . 中国地壳厚度及上地幔密度分布(三维重力反演结果) [J]. 地震学报 , 1985 , 7 ( 2 ): 143 - 157 .
FENG Rui . Crustal Thickness and Densities in the Upper Mantle Beneath China—The Results of Three Dimensional Gravity Inversion [J]. Acta Seismologica Sinica , 1985 , 7 ( 2 ): 143 - 157 .
郭凌冬 , 付广裕 , 佘雅文 , 等 . 雅鲁藏布江桑日—墨脱段岩石圈均衡研究以及虚拟水库诱发地震危险性分析 [J]. 地球物理学报 , 2021 , 64 ( 9 ): 3220 - 3231 .
GUO Lingdong , FU Guangyu , SHE Yawen , et al . Study on Lithospheric Equilibrium of Sangri-Medog Section of Yarlung Zangbo River and Analysis of Earthquake Risk Induced by Virtual Reservoir [J ]. Chinese Journal of Geophysics , 2021 , 64 ( 9 ): 3220 - 3231 .
FU G Y , GAO S H , FREYMUELLER J T , et al . Bouguer Gravity Anomaly and Isostasy at Western Sichuan Basin Revealed by New Gravity Surveys [J]. Journal of Geophysical Research: Solid Earth , 2014 , 119 ( 4 ): 3925 - 3938 .
FU G Y , SHE Y W . Gravity Anomalies and Isostasy Deduced from New Dense Gravimetry Around the Tsangpo Gorge, Tibet [J]. Geophysical Research Letters , 2017 , 44 ( 20 ): 10233 - 10239 .
刘威 , 王绪本 , 王向鹏 , 等 . 小波多尺度分析在青藏高原东缘重力场的应用 [J]. 物探化探计算技术 , 2022 , 44 ( 1 ): 77 - 87 .
LIU Wei , WANG Xuben , WANG Xiangpeng , et al . Application of Wavelet Multi-Scale Analysis in the Gravity Field on the Eastern Edge of the Qinghai-Tibet Plateau [J]. Computing Techniques for Geophysical and Geochemical Exploration , 2022 , 44 ( 1 ): 77 - 87 .
陈兆辉 , 陈石 , 张双喜 , 等 . 青藏高原东南缘多尺度重力场及构造含义 [J]. 地震 , 2021 , 41 ( 1 ): 25 - 39 .
CHEN Zhaohui , CHEN Shi , ZHANG Shuangxi , et al . Multi-Scale Gravity Field of Southeastern Tibetan Plateau and Its Tectonic Significance [J]. Earthquake , 2021 , 41 ( 1 ): 25 - 39 .
黎莎 . 小波变换在重力异常提取中的研究及应用 [D]. 成都 : 成都理工大学 , 2015 .
LI Sha . Study and Application of Local Gravity Anomaly Extraction Based on Wavelet Transform [D]. Chengdu : Chengdu University of Technology , 2015 .
杨文采 , 施志群 , 侯遵泽 , 等 . 离散小波变换与重力异常多重分解 [J]. 地球物理学报 , 2001 , 44 ( 4 ): 534 - 541 .
YANG Wencai , SHI Zhiqun , HOU Zunze , et al . Discrete Wavelet Transform for Multiple Decomposition of Gravity Anomalies [J]. Chinese Journal of Geophysics , 2001 , 44 ( 4 ): 534 - 541 .
SPECTOR A , GRANT F S . Statistical Models for Interpreting Aeromagnetic Data [J]. Geophysics , 1970 , 35 ( 2 ): 293 - 302 .
LI Y G , OLDENBURG D W . 3-D Inversion of Magnetic Data [J]. Geophysics , 1996 , 61 ( 2 ): 394 - 408 .
ZHANG Y , YAN J G , LI F , et al . A New Bound Constraints Method for 3-D Potential Field Data Inversion Using Lagrangian Multipliers [J]. Geophysical Journal International , 2015 , 201 ( 1 ): 267 - 275 .
孙少波 , 陈石 , 龚立卓 , 等 . 青藏高原及周边地壳均衡模式与强震活动 [J]. 地震学报 , 2018 , 40 ( 3 ): 341 - 350 .
SUN Shaobo , CHEN Shi , GONG Lizhuo , et al . Crustal Isostasy Model and Strong Earthquakes in the Tibetan Plateau and Its Surroundings [J]. Acta Seismologica Sinica , 2018 , 40 ( 3 ): 341 - 350 .
方东 , 胡敏章 , 郝洪涛 . 青藏高原东南缘重力场多尺度分析及其构造含义 [J]. 地震地质 , 2021 , 43 ( 5 ): 1208 - 1232 .
FANG Dong , HU Minzhang , HAO Hongtao . Multi-scale Analysis of the Gravity Field in the Southeastern Qinghai-Tibet Plateau and Its Tectonic Implications [J]. Seismology and Geology , 2021 , 43 ( 5 ): 1208 - 1232 .
李健 , 周云轩 , 许惠平 . 重力场数据处理中小波母函数的选择 [J]. 物探与化探 , 2001 , 25 ( 6 ): 410 - 417 .
LI Jian , ZHOU Yunxuan , XU Huiping . The Selection of Wavelet Generating Functions in Data-Processing of Gravity Field [J]. Geophysical and Geochemical Exploration , 2001 , 25 ( 6 ): 410 - 417 .
BILHAM R , GAUR V K , MOLNAR P . Himalayan Seismic Hazard [J]. Science , 2001 , 293 ( 5534 ): 1442 - 1444 .
张涛 . 青藏高原南部及其东南缘弧形构造带地应力场特征研究 [D]. 武汉 : 长江科学院 , 2020 .
ZHANG Tao . Study on the Characteristics of In-Situ Stress Field in the Southern Tibetan Plateau and Its Arc Structural Belt in Southeastern Margin [D]. Wuhan : Changjiang River Scientiffic Research Institute , 2020 .
梁晓峰 , 陈凌 , 田小波 , 等 . 青藏高原地壳结构特征指示的高原隆升机制 [J]. 中国科学: 地球科学 , 2023 , 53 ( 12 ): 2808 - 2829 .
LIANG Xiaofeng , CHEN Ling , TIAN Xiaobo , et al . Uplifting Mechanism of The Tibetan Plateau Inferred from The Characteristics of Crustal Structures [J]. Science China Earth Sciences , 2023 , 53 ( 12 ): 2808 - 2829 .
LASKE G , MASTERS G , MA Z , et al . CRUST1.0: An Updated Global Model of Earth’s Crust [J]. Geophysical Research Abstracts. EGU , 2012 , 14 : 743 .
张进江 , 丁林 . 青藏高原东西向伸展及其地质意义 [J]. 地质科学 , 2003 , 38 ( 2 ): 179 - 189 .
ZHANG Jinjiang , DING Lin . East West Extension in Tibetan Plateau and Its Significance to Tectonic Evolution [J]. Scientia Geologica Sinica , 2003 , 38 ( 2 ): 179 - 189 .
张佳伟 , 李汉敖 , 张会平 , 等 . 青藏高原新生代南北走向裂谷研究进展 [J]. 地球科学进展 , 2020 , 35 ( 8 ): 848 - 862 .
ZHANG Jiawei , LI Han’ao , ZHANG Huiping , et al . Research Progress in Cenozoic N-S Striking Rifts in Tibetan Plateau [J]. Advances in Earth Science , 2020 , 35 ( 8 ): 848 - 862 .
黄星 , 高原 . 青藏高原及其周缘地区各向异性研究进展 [J]. 地震学报 , 2014 , 36 ( 6 ): 1141 - 1151 .
HUANG Xing , GAO Yuan . Reviews on the Anisotropy Studies in the Tibetan Plateau and Its Adjacent Areas [J]. Acta Seismologica Sinica , 2014 , 36 ( 6 ): 1141 - 1151 .
周征宇 , 廖宗廷 . 印度板块向欧亚板块俯冲碰撞的新模式及其对青藏高原构造演化的影响 [J]. 沉积与特提斯地质 , 2005 , 25 ( 4 ): 27 - 32 .
ZHOU Zhengyu , LIAO Zongting . The Model for the Subduction and Collision of the Indian Plate with the Eurasian Plate and Its Implications for the Tectonic Evolution of the Qinghai-Xizang Plateau [J]. Sedimentary Geology and Tethyan Geology , 2005 , 25 ( 4 ): 27 - 32 .
宛家宽 . 联合重力和面波相速度反演青藏高原地壳上地幔密度结构 [D]. 武汉 : 华中科技大学 , 2021 .
WAN Jiakuan . A Density Model of the Crust and Upper Mantle in Tibetan Plateau from the joint Inversion of Gravity and Surface Wave Phase Velocity [D]. Wuhan : Huazhong University of Science and Technology , 2021 .
王双杰 . 花岗岩部分熔融电导率研究及其对青藏高原地壳高导异常的启示 [D]. 北京 : 中国地震局地震预测研究所 , 2020 .
WANG Shuangjie . Study on Partial Melting Conductivity of Granite and Its Enlightenment to Crustal High Conductivity Anomaly in Qinghai-Tibet Plateau [D]. Beijing : Institute of Earthquake Forecasting China , 2020 .
张培震 , 邓起东 , 张竹琪 , 等 . 中国大陆的活动断裂、地震灾害及其动力过程 [J]. 中国科学: 地球科学 , 2013 , 43 ( 10 ): 1607 - 1620 .
ZHANG Peizhen , DENG Qidong , ZHANG Zhuqi , et al . Active Faults, Earthquake Hazards and Associated Geodynamic Processes in Continental China [J]. Scientia Sinica (Terrae) , 2013 , 43 ( 10 ): 1607 - 1620 .
CHEN N S , TIAN S F , WANG F W , et al . Multi-wing Butterfly Effects on Catastrophic Rockslides [J]. Geoscience Frontiers , 2023 , 14 ( 6 ): 101627 .
YIN A , HARRISON T M . Geologic Evolution of the Himalayan-Tibetan Orogen [J]. Annual Review of Earth and Planetary Sciences , 2000 , 28 : 211 - 280 .
0
浏览量
159
下载量
0
CSCD
关联资源
相关文章
相关作者
相关机构
京公网安备11010802024621