The automatic determination of the location, depth, and dip of contacts from aeromagnetic data
The automatic determination of the location, depth, and dip of contacts from aeromagnetic data
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DOI：
10.1190/geo2013-0181.1
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发表时间：
2014-03
期刊：
影响因子：
3.3
通讯作者：
G. Cooper
中科院分区：
文献类型：
--
作者：
G. Cooper
对一种简单的新方法(称为接触深度法)进行了评价，该方法用于从极减磁场数据中确定触点的深度、位置和倾角。深度是通过计算触头上方磁场倾角的切线的水平导数来获得的。虽然它基于倾斜深度法，但它不需要测量等高线之间的距离，而且它还允许根据深度估计的梯度来估计触点的倾斜度。触点的水平位置是倾角零值的位置。该方法利用磁场的二阶和三阶导数来获得触头参数，因此对噪声比较敏感。当对合成数据和南部非洲的航磁数据进行测试时，该方法给出了可信的结果。
ABSTRACTA simple new method (termed the contact-depth method) for the determination of the depth, location, and dip of contacts from pole reduced magnetic data was evaluated. The depth was obtained by computing the horizontal derivative of the tangent of the tilt angle of the magnetic field over the contact. Although it is based upon the tilt-depth method, it does not require the distance between contour lines to be measured, and it additionally allows the dip of the contact to be estimated from the gradient of the depth estimates. The horizontal location of the contact is that of the zero value of the tilt angle. The method uses second- and third-order derivatives of the magnetic field to obtain the parameters of the contact, so it is sensitive to noise. When tested on synthetic data and on aeromagnetic data from southern Africa, the method gave plausible results.