小波分析在重力界面反演中的应用
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摘要
基于Parker-Oldenburg反演方法,分析了低通滤波器B(K)的不同阈值对位场分离的影响。分别采用小波变换和低通滤波对青藏高原地区布格重力异常进行了位场分解和莫霍面反演,并将反演结果与地震资料作比较。结果表明,在重力位场分解中小波多尺度分解可以代替低通滤波器B(K),避免了阈值的选取。
This paper describes the inversion of gravity anomaly using Parker-Oldenburg method briefly,and analyzes the effects of different thresholds of low-pass filter on the separation of the gravity field.The Bouguer gravity anomaly in Tibetan Plateau is decomposed by wavelet transform and low-pass filter respectively,and applied to the inversion of Moho.Comparing inverted Moho interface from wavelet transform and low-pass filter with that from seismic source,it can be concluded that the multi-scale decomposition of wavelet is able to substitute low-pass filter B(K) and avoid choosing the threshold of the low-pass filter in the decomposition of the gravity field.
引文
[1]Negi J G,Grade S C.Symmetric Matrix Method forGravity Interpretation[J].J.Geophys.Res.,1969(74):3 804-3 807
    [2]Oldenburg DW.The Inversion and Interpretation ofGravity Anomalies[J].Geophysics,1974,39(4):526-536
    [3]Nagendra R,Prasad P V S,Bhimasankapram V LS.Forward and Inverse Computer Modeling of aGravity Filed Resulting From a Density InterfaceUsing Parker-Oldenburg Method[J].Computers&Geosciences,1996,22(3):227-237
    [4]侯遵泽,杨文采,刘家琦.中国大陆地壳密度差异多尺度反演[J].地球物理学报,1998,41(5):642-651
    [5]王金波,许梦杰,彭瑞仁.小波分频在重力异常界面反演计算中的应用[J].高等学校计算数学学报,2001(1):68-72
    [6]方盛明,余钦范,张先康.中国东部及其邻域岩石圈底界面特征及地震活动性[J].地球物理学报,2001,44(1):48-53
    [7]侯遵泽,杨文采.中国重力异常的小波变换与多尺度分解[J].地球物理学报,1997,40(1):85-95
    [8]徐长发,李国宽.实用小波方法[M].武汉:华中科技大学出版社,2004
    [9]杨文采,施志群,侯遵泽,程振炎.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
    [10]Moira A.Mugglestone and Eric Renshaw.Detec-tion of Geological Lineations on Aerial PhotographsUsing Two-dimensional Spectral Analysis[J].Com-puters&Geosciences,1998,24(8):771-784

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