Tilt-depth method: A simple depth estimation method using first-order magnetic derivatives
Tilt-depth method: A simple depth estimation method using first-order magnetic derivatives
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DOI：
10.1190/1.2821934
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发表时间：
2007-12
期刊：
影响因子：
3.3
通讯作者：
A. Salem;S. Williams;J. Fairhead;D. Ravat;Richard S. Smith
中科院分区：
文献类型：
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作者：
A. Salem;S. Williams;J. Fairhead;D. Ravat;Richard S. Smith
航磁数据通常以总磁场强度（TMI）的等值线图或彩色阴影图的形式呈现。解释员的任务是识别地图中包含的特征（异常），并定性和/或定量地将其解释为深部地质结构。如果地图包含具有大磁场强度的异常，则可能认为这些天体具有大的磁化强度，或者位于较浅的深度。叠加在这些异常上的小振幅异常可能会被解释者掩盖甚至错过。因此，解释器的任务是使用异常的频谱内容来尝试解决这些模糊性。这一过程的一部分也是为了获得对引起异常的物体的深度和形状的估计。
Aeromagnetic data are routinely presented as contour or color-shaded maps of the total magnetic intensity (TMI). An interpreter's task is to identify features (anomalies) contained within the map and qualitatively and/or quantitatively interpret them into geologic structures at depth. If the map contains anomalies that have large magnetic intensities, the bodies might be considered to have large magnetizations, or to be at shallow depths. Small amplitude anomalies superimposed on these anomalies could be masked or even missed by an interpreter. Thus the task of the interpreter is to use the spectral content of the anomalies to try and resolve these ambiguities. Part of this process is also to obtain estimates of the depth and shape of the body causing the anomalies.