中国大陆2000—2007年重力场变化多尺度分解
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摘要
利用小波变换方法将2000—2007年中国大陆重力场动态变化多尺度分解,获得不同小波尺度意义下的重力场动态累积变化。结果表明:1)一阶小波细节基本与构造活动无关;2)二阶小波细节较好地反映了青藏高原的隆升和汶川Ms8.0地震的孕育;3)三阶小波细节较好地反映了青藏高原的隆升及其内部物质向东运移、昆仑地震、汶川地震等较大尺度构造活动信息;4)三阶小波逼近较好地反映了印度板块对青藏高原的碰撞、太平洋板块向欧亚板块下的俯冲、华北地块现今运动趋势等大尺度构造活动信息。
Dynamic gravity field variations during the period from 2000 to 2007 in China mainland are decomposed after the method of multi-scale decomposition of wavelet transform.The dynamic gravity field variations of the different-scale wavelet and the following results are drawn: 1) The first-order wavelet details are independent of tectonic activities basically.2)The second-order wavelet details well reflect the uplift of Tibetan Plateau and the preparation of Wenchuan Ms8.0 earthquake.3)The third-order wavelet details well give information about larger scale tectonic activities,such as uplift and eastward mass flow of Tibetan Plateau,Kunlun earthquake and Wenchuan earthquake.4)The third-order wavelet approximations well give information about large-scale tectonic activities,such as the collision of India plate with Tibetan Plateau,the subduction of Pacific plate to Eurasian plate and the movement tendency of north China block.
Dynamic gravity field variations during the period from 2000 to 2007 in China mainland are decomposed after the method of multi-scale decomposition of wavelet transform.The dynamic gravity field variations of the different-scale wavelet and the following results are drawn: 1) The first-order wavelet details are independent of tectonic activities basically.2)The second-order wavelet details well reflect the uplift of Tibetan Plateau and the preparation of Wenchuan Ms8.0 earthquake.3)The third-order wavelet details well give information about larger scale tectonic activities,such as uplift and eastward mass flow of Tibetan Plateau,Kunlun earthquake and Wenchuan earthquake.4)The third-order wavelet approximations well give information about large-scale tectonic activities,such as the collision of India plate with Tibetan Plateau,the subduction of Pacific plate to Eurasian plate and the movement tendency of north China block.
引文
1李辉,等.中国大陆近期重力场动态变化图像[J].大地测量与地球动力学,2009,(3):1-10.(Li Hui,et al.Dy-namic gravity change in recent years in China continent[J].Journal of Geodesy and Geodynamic,2009,(3):1-10)
2许厚泽,蒋福珍,张赤军.我国动力大地测量学的进展[J].地球科学进展,2000,15(2):127-133.(Xu Houze,Jiang Fuzhen and Zhang Chijun.Progress of dynamic geode-sy in China[J].Advance in Earth Sciences,2000,15(2):127-133)
3许厚泽.重力观测在中国地壳运动观测网络中的作用[J].大地测量与地球动力学,2003,(2):1-3.(XuHouze.Function of gravimetry in CMONOC[J].Journal ofGeodesy and Geodynamic,2003,(2):1-3)
4申重阳,李辉.研究现今地壳运动和强震机理的一种方法[J].地球物理学进展,2007,22(1):49-56.(ShenChongyang and Li Hui.A method of analyzing the presentcrustal movement and the mechanism of strong shocks[J].Process in Geophysics,2007,22(1):49-56)
5祝意青,等.昆仑山口西8.1级地震前重力变化[J].地震学报,2003,25(3):291-297.(Zhu Yiqing,et al.Gravi-ty variation before Kunlun mountain pass western Ms8.1earthquake[J].Acta Seismilogica Sinica,2003,25(3):291-297)
6祝意青,等.中国大陆重力场变化及其引起的地球动力学特征[J].武汉大学学报(信息科学版),2007,32(3):246-250.(Zhu Yiqing,et al.On gravity field variations andgeodynamic characteristics in mainland of China[J].Geo-matics and Information Science of Wuhan University,2007,32(3):246-250)
7申重阳,等.重力场动态变化与汶川Ms8.0地震孕育过程[J].地球物理学报,2009,52(10):2547-2557.(Shen Chongyang,et al.Dynamic variations of gravity andthe preparation process of the Wenchuan Ms8.0 earthquake[J].Chinese J Geophys.,2009,52(10):2547-2557)
8李瑞浩,等.唐山地震前后区域重力场变化机制[J].地震学报,1997,19(4):399-407.(Li Ruihao,et al.Mecha-nism of regional gravity changes before and after Tangshanearthquake[J].Acta Seismilogica Sinica,1997,19(4):399-407)
9 Shen C Y,Li H and Fu G Y.Study on a gravity precursormode of the Ms=7.0 Lijiang earthquake[J].Acta Seismi-logica Sinica,2003,16(2):175-184.
10申重阳,等.长江三峡库首区近期重力场动态变化[J].大地测量与地球动力学,2004,(2):6-13.(ShenChongyang,et al.Dynamic variations of gravity field inhead area of three gorges reservoir in recent years[J].Journal of Geodesy and Geodynamic,2004,24(2):6-13)
11杨文采,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):534-545.(Yang Wencai,etal.Discrete wavelet transform for multiple decomposition ofgravity anomalies[J].Chinese Journal of Geophysics,2001,44(4):534-545)
12张永志,等.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,1997,17(3):26-32.(Zhang Yongzhi,et al.Relationship between wavelet anal-ysis results of gravity and earthquake in Hexi region[J].Crustal Deformation and Earthquake,1997,17(3):26-32)
13朱桂芝,等.河西地区重力动态变化的二维离散小波多尺度分解[J].大地测量与地球动力学,2004,(1):46-49.(Zhu Guizhi,et al.Multi-scale decomposition of2-d discrete wavelet of dynamic gravity variation in Hexi re-gion[J].Journal of Geodesy and Geodynamics,2004,(1):46-49)
14刘少明,等.小波多尺度分解特征分析[J].大地测量与地球动力学,2004,(2):34-41.(Liu Shaomimg,et al.Analysis of characteristics of wavelet multi-scale decomposi-tion[J].Journal of Geodesy and Geodynamics,2004,24(2):34-41)
15 Sandwell D T.Biharmonic spline interpolation of GEOS-3and SEASAT altimeter data[J].Geophysical ResearchLetters,1987,14(2):139-142.
16 Mallat S.A theory for multiresolution signal decomposition:the wavelet representation[J].IEEE Pattern Anal and Ma-chine Intell.,1989,11(7):674-693.
17邓起东,等.中国活动构造基本特征[J].中国科学(D辑),2002,32(12):1 020-1 030.(Deng Qidong,et al.The basic characteristics of active tectonics in China[J].Science in China(serie D),2002,32(12):1 020-1 030)
18张国民,等.中国大陆活动地块边界带与强震活动[J].地球物理学报,2005,48(3):602-610.(Zhang Guomin,et al.Boundaries between active-tectonic blocks and strongearthquakes in the China mainland[J].Chinese J Geo-phys.,2005,48(3):602-610)
19马宗晋,高祥林,宋正范.中国布格重力异常水平梯度图的判读和构造解释[J].地球物理学报,2006,49(1):106-114.(Ma Zongji,Gao Xianglin and Song ZhengfanAnalysis and tectonic interpretation to the horizontal-gradi-ent map calculated from Bouguer gravity data in the Chinamainland[J].Chinese J Geophys.,2006,49(1):106-114)
20 Sun W K,et al.Gravity and GPS measurement reveal massloss beneath the Tibetan Plateau:geodetic evidence of in-creasing crustal thickness[J].Geophysical Research Let-ters,2009,36(2):1-5.
21邢乐林,等.用拉萨点大地测量资料检测青藏高原地壳的增厚[J].测绘学报,2011,30(1):41-44.(Xing Le-lin,et al.Present-day crustal thickness increasing beneaththe Qinghai-Tibetan plateau by using geodetic data at Lasastation[J].Acta Geodaetica Cartographica Sinica,2011,30(1):41-44)
22李德威.东昆仑、玉树、汶川地震的发生规律和形成机理:兼论大陆地震成因与预测[J].地学前缘,2010,17(5):179-192.(Li Dewei.The regularity and mecha-nism of East Kunlun,Wenchuan,and Yushu earthquakesand discussion on genesis and prediction of continentalearthquakes[J].Earth Science Frontiers,2010,17(5):179-192)
23邢乐林,等.成都基准台绝对重力复测结果分析[J].大地测量与地球动力学,2008,(6):38-42.(Xing Lelin,et al.Analysis of repeat absolute gravity results at Chengduseismostation[J].Journal of Geodesy and Geodynamic,2008,28(6):38-42)
24张跃刚,胡新康.华北地块及其边界的相对运动[J].大地测量与地球动力学,2005,(1):47-50.(Zhang Yue-gang and Hu Xinkang.Relative motion between plates andtheir boundaries in north China[J].Journal of Geodesyand Geodynamic,2005,25(1):47-50)
25吴佳翼,郁曙君,何淑韵.华北地震同日本地震的相关性[J].地球物理学报,1979,22(4):415-438.(WuJiayi,Yu Shujun and He Shuyun.The correlation of earth-quake occurrence between northeastern China and Japan[J].Chinese J.Geophys,1979,22(4):415-438)
26孙文斌,和跃时,李英波.日本海区板块俯冲与华北地震[J].地震学报,1985,7(1):33-44.(Sun Wenbin,HeYueshi and Li Yingbo.Subduction of the Pacific plate inthe sea of Japan and earthquake of northeastern China[J].Acta Seismilogica Sinica,1985,7(1):33-44)
27叶洪,张文郁.初论华北板内地震断层特征及其与地壳、上地幔动力学过程的关系[J].地震地质,1980,2(1):27-38.(Ye Hong and Zhang Wenyu.The characteristics ofintraplate earthquake faults in north China and their rela-tionship to the dynamical processes in earth’s crust and up-permost mantle[J].Seismology and Geology,1980,2(1):27-38)
28王琪,等.中国大陆现今地壳运动和构造变形[J].中国科学(D辑),2001,31(7):529-536.(Wang Qi,et al.Recent crustal movement and tectonic deformation in Chinamailand[J].Science in China(serie D),2001,31(7):529-536)
29魏斯禹,等.中国东部大陆边缘地带的岩石圈结构与动力学[M].北京:科学出版社,1990,177-188.(WeiSiyu,et al.The lithosphere structure and dynamics in con-tinental margin of eastern China[M].Beijing:SciencePress,1990,177-188)
2许厚泽,蒋福珍,张赤军.我国动力大地测量学的进展[J].地球科学进展,2000,15(2):127-133.(Xu Houze,Jiang Fuzhen and Zhang Chijun.Progress of dynamic geode-sy in China[J].Advance in Earth Sciences,2000,15(2):127-133)
3许厚泽.重力观测在中国地壳运动观测网络中的作用[J].大地测量与地球动力学,2003,(2):1-3.(XuHouze.Function of gravimetry in CMONOC[J].Journal ofGeodesy and Geodynamic,2003,(2):1-3)
4申重阳,李辉.研究现今地壳运动和强震机理的一种方法[J].地球物理学进展,2007,22(1):49-56.(ShenChongyang and Li Hui.A method of analyzing the presentcrustal movement and the mechanism of strong shocks[J].Process in Geophysics,2007,22(1):49-56)
5祝意青,等.昆仑山口西8.1级地震前重力变化[J].地震学报,2003,25(3):291-297.(Zhu Yiqing,et al.Gravi-ty variation before Kunlun mountain pass western Ms8.1earthquake[J].Acta Seismilogica Sinica,2003,25(3):291-297)
6祝意青,等.中国大陆重力场变化及其引起的地球动力学特征[J].武汉大学学报(信息科学版),2007,32(3):246-250.(Zhu Yiqing,et al.On gravity field variations andgeodynamic characteristics in mainland of China[J].Geo-matics and Information Science of Wuhan University,2007,32(3):246-250)
7申重阳,等.重力场动态变化与汶川Ms8.0地震孕育过程[J].地球物理学报,2009,52(10):2547-2557.(Shen Chongyang,et al.Dynamic variations of gravity andthe preparation process of the Wenchuan Ms8.0 earthquake[J].Chinese J Geophys.,2009,52(10):2547-2557)
8李瑞浩,等.唐山地震前后区域重力场变化机制[J].地震学报,1997,19(4):399-407.(Li Ruihao,et al.Mecha-nism of regional gravity changes before and after Tangshanearthquake[J].Acta Seismilogica Sinica,1997,19(4):399-407)
9 Shen C Y,Li H and Fu G Y.Study on a gravity precursormode of the Ms=7.0 Lijiang earthquake[J].Acta Seismi-logica Sinica,2003,16(2):175-184.
10申重阳,等.长江三峡库首区近期重力场动态变化[J].大地测量与地球动力学,2004,(2):6-13.(ShenChongyang,et al.Dynamic variations of gravity field inhead area of three gorges reservoir in recent years[J].Journal of Geodesy and Geodynamic,2004,24(2):6-13)
11杨文采,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):534-545.(Yang Wencai,etal.Discrete wavelet transform for multiple decomposition ofgravity anomalies[J].Chinese Journal of Geophysics,2001,44(4):534-545)
12张永志,等.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,1997,17(3):26-32.(Zhang Yongzhi,et al.Relationship between wavelet anal-ysis results of gravity and earthquake in Hexi region[J].Crustal Deformation and Earthquake,1997,17(3):26-32)
13朱桂芝,等.河西地区重力动态变化的二维离散小波多尺度分解[J].大地测量与地球动力学,2004,(1):46-49.(Zhu Guizhi,et al.Multi-scale decomposition of2-d discrete wavelet of dynamic gravity variation in Hexi re-gion[J].Journal of Geodesy and Geodynamics,2004,(1):46-49)
14刘少明,等.小波多尺度分解特征分析[J].大地测量与地球动力学,2004,(2):34-41.(Liu Shaomimg,et al.Analysis of characteristics of wavelet multi-scale decomposi-tion[J].Journal of Geodesy and Geodynamics,2004,24(2):34-41)
15 Sandwell D T.Biharmonic spline interpolation of GEOS-3and SEASAT altimeter data[J].Geophysical ResearchLetters,1987,14(2):139-142.
16 Mallat S.A theory for multiresolution signal decomposition:the wavelet representation[J].IEEE Pattern Anal and Ma-chine Intell.,1989,11(7):674-693.
17邓起东,等.中国活动构造基本特征[J].中国科学(D辑),2002,32(12):1 020-1 030.(Deng Qidong,et al.The basic characteristics of active tectonics in China[J].Science in China(serie D),2002,32(12):1 020-1 030)
18张国民,等.中国大陆活动地块边界带与强震活动[J].地球物理学报,2005,48(3):602-610.(Zhang Guomin,et al.Boundaries between active-tectonic blocks and strongearthquakes in the China mainland[J].Chinese J Geo-phys.,2005,48(3):602-610)
19马宗晋,高祥林,宋正范.中国布格重力异常水平梯度图的判读和构造解释[J].地球物理学报,2006,49(1):106-114.(Ma Zongji,Gao Xianglin and Song ZhengfanAnalysis and tectonic interpretation to the horizontal-gradi-ent map calculated from Bouguer gravity data in the Chinamainland[J].Chinese J Geophys.,2006,49(1):106-114)
20 Sun W K,et al.Gravity and GPS measurement reveal massloss beneath the Tibetan Plateau:geodetic evidence of in-creasing crustal thickness[J].Geophysical Research Let-ters,2009,36(2):1-5.
21邢乐林,等.用拉萨点大地测量资料检测青藏高原地壳的增厚[J].测绘学报,2011,30(1):41-44.(Xing Le-lin,et al.Present-day crustal thickness increasing beneaththe Qinghai-Tibetan plateau by using geodetic data at Lasastation[J].Acta Geodaetica Cartographica Sinica,2011,30(1):41-44)
22李德威.东昆仑、玉树、汶川地震的发生规律和形成机理:兼论大陆地震成因与预测[J].地学前缘,2010,17(5):179-192.(Li Dewei.The regularity and mecha-nism of East Kunlun,Wenchuan,and Yushu earthquakesand discussion on genesis and prediction of continentalearthquakes[J].Earth Science Frontiers,2010,17(5):179-192)
23邢乐林,等.成都基准台绝对重力复测结果分析[J].大地测量与地球动力学,2008,(6):38-42.(Xing Lelin,et al.Analysis of repeat absolute gravity results at Chengduseismostation[J].Journal of Geodesy and Geodynamic,2008,28(6):38-42)
24张跃刚,胡新康.华北地块及其边界的相对运动[J].大地测量与地球动力学,2005,(1):47-50.(Zhang Yue-gang and Hu Xinkang.Relative motion between plates andtheir boundaries in north China[J].Journal of Geodesyand Geodynamic,2005,25(1):47-50)
25吴佳翼,郁曙君,何淑韵.华北地震同日本地震的相关性[J].地球物理学报,1979,22(4):415-438.(WuJiayi,Yu Shujun and He Shuyun.The correlation of earth-quake occurrence between northeastern China and Japan[J].Chinese J.Geophys,1979,22(4):415-438)
26孙文斌,和跃时,李英波.日本海区板块俯冲与华北地震[J].地震学报,1985,7(1):33-44.(Sun Wenbin,HeYueshi and Li Yingbo.Subduction of the Pacific plate inthe sea of Japan and earthquake of northeastern China[J].Acta Seismilogica Sinica,1985,7(1):33-44)
27叶洪,张文郁.初论华北板内地震断层特征及其与地壳、上地幔动力学过程的关系[J].地震地质,1980,2(1):27-38.(Ye Hong and Zhang Wenyu.The characteristics ofintraplate earthquake faults in north China and their rela-tionship to the dynamical processes in earth’s crust and up-permost mantle[J].Seismology and Geology,1980,2(1):27-38)
28王琪,等.中国大陆现今地壳运动和构造变形[J].中国科学(D辑),2001,31(7):529-536.(Wang Qi,et al.Recent crustal movement and tectonic deformation in Chinamailand[J].Science in China(serie D),2001,31(7):529-536)
29魏斯禹,等.中国东部大陆边缘地带的岩石圈结构与动力学[M].北京:科学出版社,1990,177-188.(WeiSiyu,et al.The lithosphere structure and dynamics in con-tinental margin of eastern China[M].Beijing:SciencePress,1990,177-188)
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