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Optimizing depth estimates from magnetic anomalies using spatial analysis tools
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DOI：10.1016/j.cageo.2015.07.018.png)
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We offer a methodology to analyze the spatial and statistical properties of the tilt derivative of magnetic anomalies, thus facilitating the mapping of the location and depth of concealed magnetic sources. This methodology uses commonly available graphical information system (GIS) software to estimate and interpolate horizontal distances between key attributes of the tilt derivative, which then are used to estimate depth and location of causative bodies. Application of the method to synthetic data illustrates its reliability to determine depths to magnetic contacts. We also achieved consistent depth results using real data from the northwest portion of the Parana Basin, Brazil, where magnetic anomaly interpretations are complicated by low geomagnetic inclinations and rocks with remanent magnetization. The tilt-derivative method provides more continuous and higher resolution contact information than the 3D Euler deconvolution technique. (C) 2015 Elsevier Ltd. All rights reserved.
Keyword:
Tilt
Depth
Magnetic anomaly
Spatial analysis
GIS
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4.4
论文数:
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被引数:
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