【摘要】 为了进一步提高小子域滤波法识别地质体边界的有效性和实用性,以银额盆地EQ区块1∶5万高精度重力资料为基础,分别利用小子域滤波、总水平导数、改进后的小子域滤波联合总水平导数等方法对重力资料进行处理,探讨各种方法的处理效果,并采用联合方法处理结果作为断裂识别的重要依据,推断出EQ区块的断裂构造格架。与地震剖面和电法剖面的解释结果进行对比,证实了推断的断裂,证明该联合方法的有效性。理论模型试验与实际应用结果表明,改进后的小子域滤波与总水平导数计算的联合处理方法将场源体边界锐化,提高了横向分辨能力,突出了地质体边界特征,能更清晰地表现研究区的断裂构造格架。更多还原

【Abstract】 In order to improve the effectiveness and practicability of sub-domain filtering method for identifying geological boundaries, the authors, based on the 1∶50000 high precision data of gravity in EQ block of the Yin-E Basin, used small sub-domain filtering method, a total horizontal derivative method, and an improved small sub-domain filtering method combined with a total horizontal derivative method to process the gravity anomalies. The results of each method were discussed in this paper. Then the fault structures were inferred on the basis of the results obtained by the combined method. Compared with the interpretation results of the seismic and electrical profile, the combined method can prove the fault structures, which shows the significance and effectiveness of this combined method. Theoretical model test and practical application results show that the combined processing method sharpens the field source boundary, enhances the lateral identification capability, highlights the geological boundary features, and even makes the fault structural framework clearer.更多还原