An improved Tilt-Euler deconvolution and its application on a Fe-polymetallic deposit
An improved Tilt-Euler deconvolution and its application on a Fe-polymetallic deposit
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改进的Tilt-Euler反褶积及其在铁多金属矿床中的应用
DOI：
10.1016/j.oregeorev.2019.103114
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发表时间：
2019-09
影响因子：
3.3
通讯作者：
Z.C. Wu
中科院分区：
文献类型：
--
作者：
Huang L.;Zhang H.L.;S. Sekelani;Z.C. Wu
基于倾角一阶导数的Tilt-Euler反褶积是在常规Euler反褶积的基础上发展起来的，得到了广泛的应用。它在没有已知结构指数的情况下估计了磁性体的水平位置和深度。由于当磁异常的一阶水平导数等于零时，不能计算倾角的导数，因此Tilt-Euler方法的反演存在奇异性。提出了一种改进的Tilt-Euler反褶积方法，避免了计算中的奇异性，减少了反演过程中的不稳定因素。由于欧拉法应该在一个窗口中实现，因此我们使用欧拉解的标准差作为色散的度量来确定最优的窗口大小。模型试验和现场应用都表明，改进的Tilt-Euler反褶积的解比Tilt-Euler反褶积的解更集中，从而获得了更稳健的解释。在现场应用中，该方法的结果表明，源体可能是范围有限的堤防。
The Tilt-Euler deconvolution based on the first derivatives of the tilt angle is advanced from the routine Euler deconvolution and it is widely used. It estimates both the horizontal location and the depth of magnetic bodies without the known structural index. Since the derivatives of the tilt angle cannot be calculated when the first horizontal derivatives of the magnetic anomaly are equal to zero, there are singularities in the inversion from the Tilt-Euler method. We present an improved method for the Tilt-Euler deconvolution, which avoids the occurrence of singularities in the calculation and reduces the unstable factors in the inversion. Since the Euler methods should be implemented in a window, we apply the standard deviation of the Euler solutions as the measure of dispersion to determine the optimal window size. Both the model test and the field application show that the solutions of the improved Tilt-Euler deconvolution are more concentrated than that of the Tilt-Euler deconvolution and, subsequently, result in a more robust interpretation. In the field application, the results of the proposed method imply that the source body is probably a dike with limited extent.
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影响因子：
3.3
作者：
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通讯作者：
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