| MULTI-SCALE DECOMPOSITION OF BOUGUER GRAVITY ANOMALY AND SEISMIC ACTIVITY IN NORTH CHINA |
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| 引用本文： | Fang Shengming,Zhang Xiankang,Jia Shixu,Duan Yonghong,Yang Zhuoxin and Qiu Shuyan (Geophysical of Exploration Center,CEA,Zhengzhou 450002,China). MULTI-SCALE DECOMPOSITION OF BOUGUER GRAVITY ANOMALY AND SEISMIC ACTIVITY IN NORTH CHINA[J]. 大地测量与地球动力学, 2003, 23(Z1) |
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| 作者姓名： | Fang Shengming Zhang Xiankang Jia Shixu Duan Yonghong Yang Zhuoxin and Qiu Shuyan (Geophysical of Exploration Center CEA Zhengzhou 450002 China) |
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| 作者单位： | Geophysical of Exploration Center，CEA，Zhengzhou 450002，China |
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| 基金项目： | SupportedbytheNationalNaturalScienceFoundation(No.49774230)andtheNationalKeyBasicResearchandDevelopmentProgram(No .G19980 40 70 2 |
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| 摘 要： | 1 IntroductionThecrustalstructureofNorthChinahasbeenstudiedalotwithgravitymethod[1 ,2 ] .Theresultsareundoubtedlyofgreatsignificancetoabetterun derstandingofthecrustalstructureofthisregion .Butsofar,neithervertical/lateraldistributionscalesnorcharacteristicsofanomalousdensitybodiesofrockmediaintheregionhavebeenrevealedsystem aticallyintermsofrockdensity .Assurfacegravityanomalyreflectstheoveralleffectofgravityanoma liesofsubsurfaceanomalousgeologicalbodiesatdif ferentdepths,ondifferentscales…
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MULTI-SCALE DECOMPOSITION OF BOUGUER GRAVITY ANOMALY AND SEISMIC ACTIVITY IN NORTH CHINA |
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| Fang Shengming,Zhang Xiankang,JIA Shixu,Duan Yonghong,YANG Zhuoxin,Qiu Shuyan. MULTI-SCALE DECOMPOSITION OF BOUGUER GRAVITY ANOMALY AND SEISMIC ACTIVITY IN NORTH CHINA[J]. Journal of Geodesy and Geodynamics, 2003, 23(Z1) |
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| Authors: | Fang Shengming Zhang Xiankang JIA Shixu Duan Yonghong YANG Zhuoxin Qiu Shuyan |
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| Abstract: | Bouguer gravity anomaly in North China is decomposed with multi-scale decomposition technique of wavelet transform. Gravity anomalies produced by anomalous density bodies of various scales are revealed from surface to Moho. Characteristics of anomalies of different orders and corresponding structural features are discussed. The result shows that details of wavelet transform of different orders reflect the distribution features of rock density at different depths and in various scales. In most cases, the two sides of a fault-especially a deep and large fault-in North China differ greatly in rock density. This difference records the history of the formation and evolution of the crust. Deep structural setting for the Ms≥7.0 strong earthquakes in this region is also discussed. |
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| Keywords: | multi-scale decomposition of wavelets Bouguer gravity anomaly rock density seismic activity North China |
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