STUDY ON THE VARIATION CHARACTERISTICS OF GRAVITY FIELD AND APPARENT DENSITY IN URUMQI AND ITS SURROUNDING AREAS

doi:10.3969/j.issn.0253-4967.2024.05.008

SEISMOLOGY AND GEOLOGY ›› 2024, Vol. 46 ›› Issue (5): 1123-1150.DOI: 10.3969/j.issn.0253-4967.2024.05.008

STUDY ON THE VARIATION CHARACTERISTICS OF GRAVITY FIELD AND APPARENT DENSITY IN URUMQI AND ITS SURROUNDING AREAS

KONG Xiang-kui¹⁾(), LIU Dai-qin²^,³^,⁴⁾^,^*(), AILIXIATI·Yushan²^,³⁾, LI Jie²^,⁴⁾, CHEN Li²⁾, LI Rui²^,⁴⁾, CHEN Rong-liu¹⁾

¹⁾ Xinjiang University, Urumqi 830046, China
²⁾ Earthquake Agency of Xinjiang Uygur Autonomous Region, Urumqi 830011, China
³⁾ School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China
⁴⁾ Urumqi Institute of Central Asia Earthquake, CEA, Urumqi 830011, China

Received:2023-09-01 Revised:2023-10-16 Online:2024-10-20 Published:2024-11-22

乌鲁木齐及周边地区重力场及视密度变化特征

孔祥魁¹⁾(), 刘代芹²^,³^,⁴⁾^,^*(), 艾力夏提·玉山²^,³⁾, 李杰²^,⁴⁾, 陈丽²⁾, 李瑞²^,⁴⁾, 陈荣柳¹⁾

¹⁾ 新疆大学, 乌鲁木齐 830046
²⁾ 新疆维吾尔自治区地震局, 乌鲁木齐 830011
³⁾ 中国科学技术大学, 地球和空间科学学院, 合肥 230026
⁴⁾ 中国地震局乌鲁木齐中亚地震研究所, 乌鲁木齐 830011

通讯作者: *刘代芹, 男, 1979年生, 正高级工程师, 博士生导师, 主要从事大地测量、重力测量及地壳形变研究工作, E-mail: xjdzjldq@126.com。
作者简介:
孔祥魁, 男, 1998年生, 现为中国地质大学(北京)地球物理学专业在读博士研究生, 研究方向为深部地球物理, E-mail: 154716419@qq.com。
基金资助:
新疆维吾尔自治区重点研发专项(2020B03006-2); 地震科技星火计划项目(XH22007YA); 新疆维吾尔自治区自然科学基金(2022D01A106); 新疆维吾尔自治区自然科学基金(2023D01A105); 国家自然科学基金(42274014); 国家重点研发计划项目(2022YFC3003703); 国家外国专家局引智项目(G2022045013L); 第3次新疆综合科学考察(2022XJKK1305); 新疆地震局科技创新团队计划(XJDZCXTD2020-1)

Abstract

Abstract:

Using seasonal gravity observation data from Urumqi and its surrounding areas, collected between April 2019 and April 2022, this paper applies absolute gravity control to perform classical adjustment calculations, identifying the spatial-temporal evolution characteristics of the gravity field in the study area. The relationship between seismic activity and gravity change has long been a topic of interest. The time-varying gravity field is a fundamental physical field that reflects the migration of mass and directly represents the internal tectonic movements of the Earth and surface mass redistribution. The link between earthquakes and gravity changes is primarily related to tectonic movement and variations in mass(density)within the Earth’s interior.

By examining gravity field changes at half-year and one-year scales and analyzing gravity profile images in relation to geological structures, this paper explores the characteristics of gravity field variations in Urumqi and its surrounding areas. To effectively separate gravity anomalies at different depth levels, wavelet multi-resolution analysis is employed to decompose the gravity field anomalies, distinguishing regional from local anomalies in the study area. Specifically, the wavelet multi-scale analysis method is applied to process gravity field dynamic data from 2019-2020, 2020-2021, and 2021-2022. This method helps isolate and interpret abnormal signals in the gravity field, improving the reliability of earthquake precursor gravity anomalies.

The gravity source characteristics provide insight into the physical property changes of the crust. In this study, the “equivalent source” inversion model is used to determine the dynamic characteristics of the crust’s apparent density. The multi-period gravity point values obtained through the adjustment method serve as input data for the equivalent source apparent density change model in the study area.

The results indicate that the gravity field in the study area exhibits clear zonation, with predominant negative changes and alternating positive and negative gravity anomalies. The wavelet gravity details show that the anomaly areas align with geological structures, and the estimated source depth, as determined by the power spectrum, is consistent with the Crust1.0 model. The inversion of the flow gravity data reveals the variation characteristics of the crust’s equivalent apparent density, which correlate well with the time-varying gravity field. Multi-scale decomposition of gravity anomalies at different depth levels further illuminates the physical property changes of the crustal medium, as reflected by the equivalent source density model. These findings, when combined with the regional tectonic background and seismic activity, offer valuable insights. The research presented in this paper provides a foundational understanding of gravity field trends in Urumqi and its surrounding areas, contributing to future predictions of gravity field changes in the region.

Key words: Variation of gravitational field, wavelet decomposition, power spectrum, apparent density inversion, earthquake

摘要：

文中基于2019年4月—2022年4月乌鲁木齐及周边地区流动重力观测资料, 采用绝对重力控制进行经典平差计算, 获取研究区重力场时空演化特征图像。针对0.5a尺度和1a尺度重力场变化并结合构造地质部位分析重力剖面变化图像, 分析了乌鲁木齐及周边地区的重力场变化特征。此外, 文中采用小波多尺度分析方法, 对乌鲁木齐及周边地区2019—2020年、 2020—2021年和2021—2022年3a的重力场动态变化数据进行处理, 分解不同场源异常, 并对分离出的异常信息进行解释和分析, 以此提升地震前兆重力异常的可信度。结果表明, 研究区重力场具有明显的分区特征, 整体以负值变化为主, 正、负重力变化交替出现; 小波重力细节反映异常区域与地质构造吻合, 功率谱估算的近似场源深度与crust1.0模型相近; 此外, 基于流动重力观测资料反演得到研究区地壳内部等效视密度变化特征。文中的研究成果将为研判乌鲁木齐及周边地区未来的重力场变化趋势提供初步依据。

关键词: 重力场变化, 小波分解, 功率谱, 视密度反演, 地震

KONG Xiang-kui, LIU Dai-qin, AILIXIATI·Yushan, LI Jie, CHEN Li, LI Rui, CHEN Rong-liu. STUDY ON THE VARIATION CHARACTERISTICS OF GRAVITY FIELD AND APPARENT DENSITY IN URUMQI AND ITS SURROUNDING AREAS[J]. SEISMOLOGY AND GEOLOGY, 2024, 46(5): 1123-1150.

孔祥魁, 刘代芹, 艾力夏提·玉山, 李杰, 陈丽, 李瑞, 陈荣柳. 乌鲁木齐及周边地区重力场及视密度变化特征[J]. 地震地质, 2024, 46(5): 1123-1150.

Figures/Tables 14

Fig. 1 Comprehensive deformation monitoring network of Urumqi “Capital Circle”.

Table 1 The main fault zones in the study area

断裂名称	长度/km	走向	倾向	倾角	运动性质	活动时代
八钢-石化隐伏断裂	41	NEE	SSE	75°~85°	逆冲	上更新统
九家湾断裂	3~5	50°	NNW、SSE	53°~84°	正断	全新统
王家沟断裂	9~15	NEE	NNW	33°~78°	逆冲	全新统
西山断裂	>35	近EW	NNW	45°~75°	逆冲	上更新统
碗窑沟断裂	55	NE	NW	45°~75°	逆冲	上更新统
雅玛里克断裂	>45	NE	SE	70°~80°	逆冲	上更新统
红雁池断裂	35	NWW	SSW	25°	左旋走滑逆冲	上更新统
大草滩隐伏断裂	26	近EW	N	陡倾	逆冲	中更新统
柴窝堡坳陷北缘隐伏断裂	88、40	EW、NE	NNE	陡	逆冲	中更新统
柴窝堡盆地南缘断裂	70	近EW	S	陡	逆冲	全新统
二道沟断裂	130	近EW	S	40°~70°	逆冲	全新统
依连哈比尔尕断层断裂	374	305°	SW	40°~70°	右旋走滑逆冲	上更新统

Fig. 2 Geographical location and geological structure of the study area(modified after Wu et al., 2022).

Fig. 3 Gravity field variation at half-year scale in the study area.

Fig. 4 Temporal and spatial variations of gravity field at one-year and three-year scales in the study area.

Fig. 5 Gravity profile and gravity variation in the study area.

Fig. 6 Map of gravity field wavelet decomposition approximation(and in some details)in 2019—2020.

Fig. 7 Map of gravity field wavelet decomposition approximation(and in some details)in 2020—2021.

Fig. 8 Map of gravity field wavelet decomposition approximation(and in some details)in 2021—2022.

Fig. 9 The radial power spectrum of wavelet detail field with order of 2~5 in the study area.

Table 2 The equivalent source depth of wavelet detail field with order of 2-5 in the study area

阶次	2019—2020年近似场源深度/km	2020—2021年近似场源深度/km	2021—2022年近似场源深度/km
D₂	6.7	7.2	7.0
D₃	13.6	15.1	14.3
D₄	25.7	35.4	29.6
D₅	40.1	45.1	42.9

Fig. 10 Gravimetric net resolution detection board.

Fig. 11 Image showing distribution feature of field source apparent density from April 2019 to April 2022.

Fig. 12 Apparent density anomaly mode obtained from inversion in the study area.

References 50

[1]	艾力夏提·玉山, 李瑞, 刘代芹, 等. 2017. 2017年精河 M_S6.6 地震前重力变化特征分析[J]. 中国地震, 33(4): 749—756.
	AILIXIATI Yu-shan, LI Rui, LIU Dai-qin, et al. 2017. Analysis of gravity changes before the jinghe M_S6.6 earthquake of 2017[J]. Earthquake Research in China, 33(4): 749—756 (in Chinese).
[2]	艾力夏提·玉山, 刘代芹, 阿卜杜塔伊尔·亚森, 等. 2024. 北天山流动重力测网场源分辨能力[J]. 大地测量与地球动力学, 44(3): 272—276.
	AILIXIATI Yu-shan, LIU Dai-qin, ABUDUTAYIER Ya-sen, et al. 2024. Field source resolution of mobile gravity network in Northern Tianshan[J]. Journal of Geodesy and Geodynamics: 44(3): 272—276 (in Chinese).
[3]	艾力夏提·玉山, 刘代芹, 李杰, 等. 2014. 新疆南天山地区重力场动态变化特征研究[J]. 内陆地震, 28(2): 176—181. doi: 10.16256/j.issn.1001-8956.02.012.
	AILIXIATI Yu-shan, LIU Dai-qin, LI Jie, et al. 2014. Study on dynamic evolution features of gravity field in southern Tianshan area, Xinjiang[J]. Inland Earthquake, 28(2): 176—181 (in Chinese).
[4]	陈丽, 艾力夏提·玉山, 朱治国, 等. 2020. 北天山中段时变重力场离散小波多尺度分解[J]. 中国地震, 36(4): 935—944.
	CHEN li, AILIXIATI Yu-shan, ZHU Zhi-guo, et al. 2020. Multi-scale decomposition of wavelet of the temporal gravity variation in Northern Tianshan Mountain[J]. Earthquake Research in China, 36(4): 935—944 (in Chinese).
[5]	邓起东, 冯先岳, 张培震, 等. 2000. 天山活动构造[M]. 北京: 地震出版社.
	DENG Qi-dong, FENG Xian-yue, ZHANG Pei-zhen, et al. 2000. Tianshan Active Tectonics[M]. Seismological Press, Beijing (in Chinese).
[6]	刁博, 王家林, 程顺有. 2007. 重力异常小波多分辨分析分解阶次的确定[J]. 地球科学(中国地质大学学报), 32(4): 564—568.
	DIAO BO, WANG Jia-lin, CHENG Shun-you, et al. 2007. The confirmation of decomposition level in wavelet multi-resolution analysis for gravity anomalies[J]. Earth Science(Journal of China University of Geosciences), 32(4): 564—568 (in Chinese).
[7]	方东. 2021. 青藏高原东缘重力场及其变化的多尺度分析研究[D]. 湖北: 中国地震局地震研究所.
	FANG Dong. 2021. Multi-scale analysis of the gravity field and its variations in the eastern Qinghai-Tibet Plateau[D]. Institute of Seismology, China Earthquake Administration, Hubei (in Chinese).
[8]	方盛明, 张先康, 嘉世旭, 等. 2002. 华北地区布格重力异常的多尺度分解特征与地震活动性[J]. 大地测量与地球动力学, 22(1): 34—39.
	FANG Sheng-ming, ZHANG Xian-kang, JIA Shi-xu, et al. 2002. Multis-scale decomposition of Bouguer gravity anomaly and seismic activity in North China[J]. Journal of Geodesy and Geodynamics, 22(1): 34—39 (in Chinese).
[9]	高德章, 侯遵泽, 唐建. 2000. 东海及邻区重力异常多尺度分解[J]. 地球物理学报, 43(6): 842—849.
	GAO De-zhang, HOU Zun-ze, TANG Jian. 2000. Multiscale analysis of gravity anomalies on East China Sea and adjacent regions[J]. Chinese Journal of Geophysics, 43(6): 842—849 (in Chinese).
[10]	郭良辉, 孟小红, 石磊, 等. 2012. 优化滤波方法及其在中国大陆布格重力异常数据处理中的应用[J]. 地球物理学报, 55(12): 4078—4088.
	GUO Liang-hui, MENG Xiao-hong, SHI Lei, et al. 2012. Preferential filtering method and its application to Bouguer gravity anomaly of Chinese continent[J]. Chinese Journal of Geophysics, 55(12): 4078—4088 (in Chinese).
[11]	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 Min-zhang, HAO Hong-tao, LI Hui, et al. 2019. Quantitative analysis of gravity changes for earthquake prediction[J]. Earthquake Research in China, 35(3): 417—430 (in Chinese).
[12]	李宏, 谢富仁, 王海忠, 等. 2012. 乌鲁木齐市断层附近地应力特征与断层活动性[J]. 地球物理学报, 55(11): 3690—3698.
	LI Hong, XIE Fu-ren, WANG Hai-zhong, et al. 2012. Characteristics of in-situ stress measurements near the fault and fault activity in Urumqi City[J]. Chinese Journal of Geophysics, 55(11): 3690—3698 (in Chinese).
[13]	刘代芹, 陈石, 王晓强, 等. 2021. 伽师6.4级地震前后震源区视密度变化及其构造意义[J]. 地震地质, 43(2): 311—328. doi: 10.3969/j.issn.0253-4967.2021.02.004.
	LIU Dai-qin, CHEN Shi, WANG Xiao-qiang, et al. 2021. The apparent density variation of the focal area before and after Jiashi M_S6.4 earthquake and its tectonic significance[J]. Seismology and Geology, 43(2): 311—328 (in Chinese).
[14]	刘代芹, 李杰, 王晓强, 等. 2015. 北天山中段近期重力场变化特征研究[J]. 地震工程学报, 37(4): 1001—1006.
	LIU Dai-qin, LI Jie, WANG Xiao-qiang, et al. 2015. Recent variation characteristics of gravity field in the middle segment of North Tianshan[J]. China Earthquake Engineering Journal, 37(4): 1001—1006 (in Chinese).
[15]	刘代芹, 王晓强, 李杰, 等. 2009. 新疆南天山地区重力场动态演化特征[J]. 西北地震学报, 31(2): 174—178.
	LIU Dai-qin, WANG Xiao-qiang, LI Jie, et al. 2009. The dynamic evolution features of gravity field in southern Tianshan area, Xinjiang[J]. Northwestern Seismological Journal, 31(2): 174—178 (in Chinese).
[16]	刘代芹, 朱治国, 王晓强, 等. 2012. 新疆天山中部重力场时空变化特征研究[J]. 地震研究, 35(4): 506—513, 597.
	LIU Dai-qin, ZHU Zhi-guo, WANG Xiao-qiang, et al. 2012. Research on the temporal-spatial variation characteristic of gravity field in the central Tianshan, Xinjiang[J]. Journal of Seismological Research, 35(4): 506—513, 597 (in Chinese).
[17]	刘天佑. 2017. 位场勘探数据处理新方法[M]. 北京: 科学出版社.
	LIU Tian-you. 2017. New Method for Data Processing of Potential Field Exploration[M]. Science Press, Beijing (in Chinese).
[18]	路晓翠. 2012. 川滇地区重力场及深部构造特征研究[D]. 山东: 山东科技大学.
	LU Xiao-cui. 2012. Study of the gravitational field and deep tectonic characteristics in Sichuan-Yunnan[D]. Shandong University of Science and Technology, Shandong (in Chinese).
[19]	毛经伦, 祝意青. 2018. 地面重力观测数据在地震预测中的应用研究与进展[J]. 地球科学进展, 33(3): 236—247.
	MAO Jing-lun, ZHU Yi-qing. 2018. Progress in the application of ground gravity observation data in earthquake prediction[J]. Advances in Earth Science, 33(3): 236—247 (in Chinese).
[20]	宋和平, 沈军, 向志勇, 等. 2009. 乌鲁木齐市活断层探测与地震危险性评价[M]. 北京: 地震出版社.
	SONG He-ping, SHEN Jun, XIANG Zhi-yong, et al. 2009. The Active Fault Detecting And Seismic Risk Assessment In Urumqi City[M]. Seismological Press, Beijing (in Chinese).
[21]	沈军, 宋和平. 2008. 乌鲁木齐城市活断层探测与地震危险性评价主要成果简介[J]. 地震地质, 30(1): 273—288.
	SHEN Jun, SONG He-ping. 2008. Brief introduction on the predominant results of the active fault detecting and seismic risk assessment in Urumqi City[J]. Seismology and Geology, 30(1): 273—288 (in Chinese).
[22]	唐丽华, 李山有, 吴传勇, 等. 2014. 2013年8月30日乌鲁木齐5.1级地震灾害特征分析[J]. 地震工程与工程振动, 34(S1): 977—982.
	TANG Li-hua, LI Shan-you, WU Chuan-yong, et al. 2014. Analysis on disaster characteristics of Urumqi M_S5.1 earthquake, August, 30th, 2013[J]. Earthquake Engineering and Engineering Dynamics, 34(S1): 977—982 (in Chinese).
[23]	王林海, 陈石, 张贝, 等. 2021. 2013年芦山 M_S7.0 地震前重力场源变化分析[J]. 地震, 41(1): 78—92.
	WANG Lin-hai, CHEN Shi, ZHANG Bei, et al. 2021. Analysis of the variation of gravity field source before the 2013 Lushan M_S7.0 earthquake[J]. Earthquake, 41(1): 78—92 (in Chinese).
[24]	王万银. 2009. 位场边缘识别方法技术研究[D]. 陕西: 长安大学.
	WANG Wan-yin. 2009. The research on the edge recognition methods and techniques for potential field[D]. Changan University, Shaanxi (in Chinese).
[25]	王志农, 孙成禹, 伍敦仕. 2019. 基于最佳小波基的地震面波插值方法[J]. 物探与化探, 43(1): 189—198.
	WANG Zhi-nong, SUN Cheng-yu, WU Dun-shi. 2019. Seismic surface wave interpolation method based on optimistic wavelet basis[J]. Geophysical and Geochemical Exploration, 43(1): 189—198 (in Chinese).
[26]	隗寿春, 祝意青, 赵云峰, 等. 2019. CG-5重力仪格值系数对重力数据处理的影响[J]. 大地测量与地球动力学, 39(2): 210—214.
	WEI Shou-chun, ZHU Yi-qing, ZHAO Yun-feng, et al. 2019. Impact on gravity data process of scale factor coefficient of CG-5 gravimeter[J]. Journal of Geodesy and Geodynamics, 39(2): 210—214 (in Chinese).
[27]	徐志萍, 姜磊, 杨利普, 等. 2015. 利用布格重力资料研究太行山东南缘断裂构造特征[J]. 大地测量与地球动力学, 35(3): 503—507.
	XU Zhi-ping, JIANG Lei, YANG Li-pu, et al. 2015. Structure characteristics of faults in the southeast segment of Taihang Mountain using Bouguer gravity data[J]. Journal of Geodesy and Geodynamics, 35(3): 503—507 (in Chinese).
[28]	杨文采, 施志群, 侯遵泽, 等. 2001. 离散小波变换与重力异常多重分解[J]. 地球物理学报, 44(4): 534—541, 582.
	YANG Wen-cai, SHI Zhi-qun, HOU Zun-ze, et al. 2001. Discrete wavelet transform for multiple decomposition of gravity anomalies[J]. Chinese Journal of Geophysics, 44(4): 534—541, 582 (in Chinese).
[29]	张永志, 丁平, 王继英, 等. 1997. 河西重力变化的小波分解与地震活动关系的研究[J]. 地壳形变与地震, 17(3): 28—34.
	ZHANG Yong-zhi, DING Ping, WANG Ji-ying, et al. 1997. Relationship between wavelet analysis results of gravity and earthquakes in Hexi region[J]. Crustal Deformation and Earthquake, 17(3): 28—34 (in Chinese).
[30]	张永奇, 韩美涛, 张恩会, 等. 2022. 渭河盆地及邻区重力异常小波多尺度分解与解释[J]. 地震研究, 45(1): 75—87.
	ZHANG Yong-qi, HAN Mei-tao, ZHANG En-hui, et al. 2022. Multi-scale wavelet decomposition and interpretation of gravity anomalies in the Weihe Basin and its adjacent areas[J]. Journal of Seismological Research, 45(1): 75—87 (in Chinese).
[31]	张站稳, 高国明, 王树琴, 等. 2023. 青藏高原东北缘及其邻区重力异常小波多尺度特征分析[J]. 云南大学学报(自然科学版), 45(4): 866—874.
	ZHANG Zhan-wen, GAO Guo-ming, WANG Shu-qin, et al. 2023. Study on the transverse variation characteristics of gravity anomalies in the northeastern margin of the Tibetan plateau and its adjacent areas, based on wavelet multi-scale analysis[J]. Journal of Yunnan University(Natural Sciences Edition), 45(4): 866—874 (in Chinese).
[32]	祝意青, 刘芳, 张国庆, 等. 2022a. 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 Yi-qing, LIU Fang, ZHANG Guo-qing, et al. 2022a. Mobile gravity monitoring and earthquake prediction in China[J]. Geomatics and Information Science of Wuhan University, 47(6): 820—829 (in Chinese).
[33]	祝意青, 申重阳, 刘芳, 等. 2020. 重力观测地震预测应用研究[J]. 中国地震, 36(4): 708—717.
	ZHU Yi-qing, SHEN Chong-yang, LIU Fang, et al. 2020. Application of earthquake prediction based on gravity observation[J]. Earthquake Research in China, 36(4): 708—717 (in Chinese).
[34]	祝意青, 张勇, 杨雄, 等. 2022b. 时变重力在地震研究方面的进展与展望[J]. 地球与行星物理论评, 53(3): 278—291.
	ZHU Yi-qing, ZHANG Yong, YANG Xiong, et al. 2022b. Progress of time-varying gravity in seismic research[J]. Reviews of Geophysics and Planetary Physics, 53(3): 278—291 (in Chinese).
[35]	Akaike H. 1980. Likelihood and the Bayes procedure[G]//Bernardo J M, De Groot M H, Lindley D V, et al.(eds). Selected Papers of Hirotugu Akaike. Bayesian Statistics, University Press, Valencia: 143—166.
[36]	Bouih M, Panet I, Remy D, et al. 2022. Deep mass redistribution prior to the 2010 M_W8.8 Maule(Chile)earthquake revealed by GRACE satellite gravity[J]. Earth and Planetary Science Letters, 584:117465. doi: 10.1016/j.pngl.
[37]	Chen Y T, Gu H D, Lu Z X. 1979. Variations of gravity before and afterthe Haicheng earthquake, 1975, and the Tangshan earthquake, 1976[J]. Physics of the Earth and Planetary Interiors, 18(4): 330—338.
[38]	Hinderer J, Hector B, Memin A, et al. 2016. Hybrid gravimetry as a tool to monitor surface and under ground mass changes[C]. International Symposium on Earth and Environmental Sciences for Future Generations. International Association of Geodesy Symposia: 123—130. doi: 10.1007/1345_2016_253.
[39]	Li Y, Oldenburg D W. 1998. 3-D inversion of gravity data[J]. Geophysics, 63(1): 109—119.
[40]	Meng X H, Guo L H, Chen Z X, et al. 2009. A method for gravity anomaly separation based on preferential continuation and its application[J]. Applied Geophysics, 6(3): 217—225. doi: 10.1007/s11770-009-0025-y.
[41]	Okubo S. 2020. Advances in gravity analyses for studying volcanoes and earthquakes[J]. Proceedings of the Japan Academy Ser B Physical and Biological Sciences, 96(2): 50—69. doi: 10.2183/pjab.96.005.
[42]	Shaw J H, Suppe J. 1996. Earthquake hazards of active blind-thrust faults under the Central Los Angeles Basin, California[J]. Journal of Geophysical Research Atmospheres, 101:8623—8642. https://doi.org/10.1029/95JB03453.
[43]	Spector A, Grant F S. 1970. Statistical models for interpreting aeromagnetic data[J]. Geophysics, 35(2): 293—302.
[44]	Suppe J. 1983. Geometry and kinematics of fault-bend folding[J]. American Journal of Science, 283: 684—721.
[45]	Tanaka Y, Kato A, Sugano T, et al. 2010. Gravity changes observed between 2004 and 2009 near the Tokai slow-slip area and prospects for detecting fluid flow during future slow-slip events[J]. Earth, Planets and Space, 62(12): 905—913. doi: 10.5047/eps.
[46]	Tapley B, Bettadpur S, Ries John C, et al. 2004. GRACE measurements of mass variability in the earth system[J]. Science, 305(5683): 503—505.
[47]	Walsh J B. 1975. An analysis of local changes in gravity due to deformation[J]. Pure and Applied Geophysics, 113: 97—106.
[48]	Wang L, Burgmann R. 2019. Statistical significance of precursory gravity changes before the 2011 M_W9.0 Tohoku-Oki earthquake[J]. Geophysical Research Letters, 46(13): 7323—7332. doi: 10.1029/2019GL082682.
[49]	Wang L H, Chen S, Zhuang J C, et al. 2023. Gravity field changes reveal deep mass transfer before and after the 2013 Lushan earthquake[J]. Communications Earth and Environment, 4:194—208. doi: 10.1038/s43247-023-00860-z.
[50]	Wu C Y, Liu J M, He X H, et al. 2022. Structural geometry of the Urumqi foreland thrust system, northern Tian Shan: Insights into the seismotectonics of the 2013 M5.1 Urumqi earthquake and deformation pattern in the Urumqi area[J]. Tectonophysics, 829: 229—294.

STUDY ON THE VARIATION CHARACTERISTICS OF GRAVITY FIELD AND APPARENT DENSITY IN URUMQI AND ITS SURROUNDING AREAS

乌鲁木齐及周边地区重力场及视密度变化特征

RichHTML

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 14

References 50

Related Articles 15

Recommended Articles

Metrics

Comments

[1]	XU Yong-qiang, LEI Jian-she, HU Xiao-hui. DOUBLE-DIFFERENCE RELOCATION OF YUNNAN YANGBI M_S6.4 EARTHQUAKE SEQUENCE ON MAY 21, 2021 AND TECTONIC IMPLICATIONS [J]. SEISMOLOGY AND GEOLOGY, 2024, 46(5): 1066-1090.
[2]	LIANG Xiao, CHU Fei, XU Ru-gang, SUN Hong-bo, XIAO Wei-peng, WANG Jun. THE CHARACTERISTICS AND MECHANISM OF GRAVITY AND MAGNETIC FIELD CHANGES BEFORE AND AFTER THE 2014 HUOSHAN M_S4.3 EARTHQUAKE [J]. SEISMOLOGY AND GEOLOGY, 2024, 46(5): 1151-1171.
[3]	LI Shu-peng, HU Min-zhang, ZHU Yi-qing, HAO Hong-tao, YIN Hai-tao, JIA Yuan, CUI Hua-wei, LU Han-peng, ZHANG Gang, WANG Feng-ji, LIU Hong-liang. GRAVITY CHANGES BEFORE THE PINGYUAN M_S5.5 EARTHQUAKE OF 2023 [J]. SEISMOLOGY AND GEOLOGY, 2024, 46(5): 1172-1191.
[4]	ZHANG An-he, ZHONG Mei-jiao, AISA Yisimayili, LIU Ping. THERMAL INFRARED ANOMALIES OF MODERATELY STRONG EARTHQUAKE IN XINJIANG AND SURROUNDING REGIONS [J]. SEISMOLOGY AND GEOLOGY, 2024, 46(5): 1192-1206.
[5]	JI Zhi-wei, LI Zong-chao, ZHANG Yan, JU Chang-hui. THE INFLUENCE OF SEISMIC SOURCE CHARACTERISTICS ON VELOCITY PULSE DISTRIBUTION IN SCENARIOS: A TEST IN HUYA FAULT [J]. SEISMOLOGY AND GEOLOGY, 2024, 46(5): 1207-1225.
[6]	CAO Jun, ZHOU Yi, GAO Chen, LIU Shu-feng, CHEN An, ZHANG Su-xin, FENG Xiang-dong, WU Peng, CHEN Zhao-dong. SEISMOGENIC FAULT OF THE TANGSHAN M_S5.1 EARTHQUAKE ON JULY 12, 2020 AND ITS IMPLICATIONS FOR REGIONAL TECTONICS [J]. SEISMOLOGY AND GEOLOGY, 2024, 46(5): 993-1011.
[7]	NIU Peng-fei, HAN Zhu-jun, GUO Peng, LI Ke-chang, LÜ Li-xing. THE DISASTER MECHANISM OF THE M_S6.9 EARTHQUAKE IN MENYUAN, QINGHAI PROVINCE, 2022 [J]. SEISMOLOGY AND GEOLOGY, 2024, 46(4): 761-782.
[8]	QIU Heng-zhi, MA Si-yuan, CHEN Xiao-li. STUDY ON THE EFFECT OF EXCESS TOPOGRAPHY ON LANDSLIDES INDUCED BY LUDING M_S6.8 EARTHQUAKE IN 2022 [J]. SEISMOLOGY AND GEOLOGY, 2024, 46(4): 783-801.
[9]	ZHANG Ya-jing, LI Zheng-fang, ZHOU Ben-gang, XIAO Hai-bo. 3D MODELING AND MAXIMUM POTENTIAL SEISMIC ASSESS-MENT OF THE EASTERN MARGIN FAULT OF DAXING UPLIFT [J]. SEISMOLOGY AND GEOLOGY, 2024, 46(4): 802-820.
[10]	HU Nan, LONG Feng, WANG Ying, XU Liang-xin. THE SPATIAL AND TEMPORAL CHARACTERISTICS OF PRESENT-DAY SEISMICITY IN NORTHEASTERN LONGMENSHAN FAULT ZONE [J]. SEISMOLOGY AND GEOLOGY, 2024, 46(4): 856-875.
[11]	JIANG Hai-kun, DENG Shi-guang, YAO Qi, SONG Jin, WANG Jin-hong. INTEGRATED INTERPRETATION ON THE PRECURSORY PROCESS EVOLUTION IN THE META-INSTABILITY STAGE OF THE EARTHQUAKE: A CASE STUDY ON 2014 LUDIAN M_S6.5 EARTHQUAKE [J]. SEISMOLOGY AND GEOLOGY, 2024, 46(3): 513-535.
[12]	CHEN Bai-xu, YU Zhong-yuan, XIAO Peng, DAI Xun-ye, ZHANG Shi-long, ZHENG Rong-ying. THE NEW FINDINGS OF SURFACE RUPTURE ZONES AND ITS SEISMOLOGICAL SIGNIFICANCE OF THE EASTERN MARGIN OF YUMUSHAN FAULT, NORTHEASTERN MARGIN OF QINGZANG PLATEAU [J]. SEISMOLOGY AND GEOLOGY, 2024, 46(3): 589-607.
[13]	YU Yue-ying, LI Zheng-kai, YANG Yun, KANG Qing-qing, QIAN Jia-wei, WANG Jun-fei, QU Min, ZHOU Yu-chen, LI Ying-chun, XU Tian. REGIONAL VELOCITY STRUCTURE AND RELOCATION OF THE 2022 DONGTAI EARTHQUAKE SEQUENCE [J]. SEISMOLOGY AND GEOLOGY, 2024, 46(3): 627-644.
[14]	XU Jing, JI Ling-yun, LIU Chuan-jin. REGIONAL DEFORMATION BACKGROUND AND COSEISMIC DEFORMATION CHARACTERISTICS OF THE 2022 LUDING M_S6.8 EARTHQUAKE [J]. SEISMOLOGY AND GEOLOGY, 2024, 46(3): 645-664.
[15]	JI Guo-qiang, LEI Jian-she, ZHAO Da-peng. THREE-DIMENSIONAL CRUSTAL VELOCITY STRUCTURE AND SEISMOGENIC ENVIRONMENT AROUND THE HUOSHAN EARTHQUAKE SWARM [J]. SEISMOLOGY AND GEOLOGY, 2024, 46(3): 665-685.