Gravity data inversion for Moho depth modeling in the Hellenic area
Gravity data inversion for Moho depth modeling in the Hellenic area
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DOI：
10.1007/s00024-015-1174-y
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发表时间：
2016-04
影响因子：
2
通讯作者：
V. Grigoriadis;I. Tziavos;G. Tsokas;A. Stampolidis
中科院分区：
文献类型：
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作者：
V. Grigoriadis;I. Tziavos;G. Tsokas;A. Stampolidis
本研究的主要目的是根据重力资料反演确定希腊地区的莫霍面。在采用Parker-Oldenburg迭代法进行计算时使用了高分辨率（2弧分）和精确度（±2至±3 mGal）的重力数据，并对重力信息进行了低通滤波，以使最终解趋于收敛。为了确定滤波器的截止波数，我们测试了地壳和地幔的不同平均深度和密度对比（Mohorovičić不连续面）。所选择的密度对比度和莫霍罗维奇不连续面的平均深度与从深地震成像数据解释的莫霍面深度一致。通过比较莫霍面深度估计，包括陆地和海洋地区，包括爱奥尼亚海和爱琴海，从以前的研究解释，它表明，我们的解决方案是一致的，与现有的地震数据解释。此外，重力数据的分辨率和适当的滤波，在这项研究中使用的莫霍面不连续的局部特征的代表性。最后，广泛讨论了当前解决方案的莫霍面深度与以前研究得出的莫霍面深度之间的区域依赖性差异。
The main objective of this study is the determination of the Moho discontinuity in the Hellenic area based on gravity data inversion. High-resolution (2 arcmin) and accuracy (±2 to ±3 mGal) gravity data were used in the computations following the Parker–Oldenburg iterative method, and a low-pass filter was applied to gravity information towards the convergence of the final solution. To determine the cut-off wavenumber of the filter, we tested different mean depths and density contrasts of the crust and the mantle (Mohorovičić discontinuity). The selected density contrast and mean depth of the Mohorovičić discontinuity are those which agree with the Moho depth interpreted from deep seismic imaging data. By comparing the Moho depth estimated, covering both land and marine areas and including the Ionian and Aegean Sea, with those interpreted from previous studies, it is shown that our solution is consistent with the available seismic data interpretation. Moreover, the resolution of the gravity data and the appropriate filtering used in this study contributed to the representation of local features of the Moho discontinuity. Finally, area-dependent discrepancies detected between the Moho depths of the current solution and those derived from previous studies are extensively discussed.