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首页> 外文期刊>Pure and Applied Geophysics >Depth Estimation from Gravity Data Using the Maximum Entropy Method (MEM) and the Multi Taper Method (MTM)
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Depth Estimation from Gravity Data Using the Maximum Entropy Method (MEM) and the Multi Taper Method (MTM)

机译:使用最大熵方法(MEM)和多锥度方法(MTM)从重力数据进行深度估计

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摘要

The depth determination from the gravity data in frequency domain is carried out using the classical fast Fourier transform (FFT) method utilizing scaling properties of ensemble of anomalous source. The problem of calculating power spectrum from the FFT is well described in the literature. Here, the application of other high-resolution methods of power spectrum calculation, such as maximum entropy method (MEM) and multi-taper method (MTM) are explored to estimate depth to anomalous sources. At the outset, the FFT, the MEM and the MTM are tested on synthetic gravity data, generated for different types of synthetic models and then all these methods are applied to the field gravity data of the Bengal basin. The MTM with scaling is found to be superior for providing the detailed subsurface information rather than the MEM and the FFT methods in the case of synthetic as well as field examples.
机译:利用经典的快速傅里叶变换(FFT)方法,利用异常源集合的缩放特性,可以从频域中的重力数据确定深度。从FFT计算功率谱的问题在文献中已有很好的描述。在这里,探索了功率谱计算的其他高分辨率方法的应用,例如最大熵方法(MEM)和多锥度方法(MTM)来估计异常源的深度。首先,对FFT,MEM和MTM进行合成重力数据测试,针对不同类型的合成模型生成这些数据,然后将所有这些方法应用于孟加拉盆地的现场重力数据。在合成以及现场实例的情况下,发现具有缩放功能的MTM在提供详细的地下信息方面优于MEM和FFT方法。

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