Journal ArticleDOI
Magnetic interpretation in three dimensions using Euler deconvolution
TLDR
Magnetic survey data in grid form may be interpreted rapidly for source positions and depths by deconvolution using Euler's homogeneity relation as discussed by the authors, which employs gradients, either measured or calculated.Abstract:
Magnetic‐survey data in grid form may be interpreted rapidly for source positions and depths by deconvolution using Euler’s homogeneity relation The method employs gradients, either measured or calculated Data need not be pole‐reduced, so that remanence is not an interfering factor Geologic constraints are imposed by use of a structural index Model studies show that the method can locate or outline confined sources, vertical pipes, dikes, and contacts with remarkable accuracy A field example using data from an intensively studied area of onshore Britain shows that the method works well on real data from structurally complex areas and provides a series of depth‐labeled Euler trends which mark magnetic edges, notably faults, with good precisionread more
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Journal ArticleDOI
Magnetic interpretation using the 3-D analytic signal
TL;DR: In this article, a new method for magnetic interpretation based on the generalization of the analytic signal concept to three dimensions was developed, where the absolute value of the signal is defined as the square root of the squared sum of the vertical and the two horizontal derivatives of the magnetic field.
Journal ArticleDOI
The historical development of the magnetic method in exploration
Misac N. Nabighian,V.J.S. Grauch,R. O. Hansen,Thomas R. LaFehr,Yaoguo Li,J. W. Peirce,Jeffrey D. Phillips,M. E. Ruder +7 more
TL;DR: The magnetic method is the primary exploration tool in the search for minerals, oil and gas, geothermal resources, and groundwater, and for a variety of other purposes such as natural hazards assessment, mapping impact structures, and engineering and environmental studies as discussed by the authors.
Journal ArticleDOI
Automatic conversion of magnetic data to depth, dip, and susceptibility contrast using the SPI (TM) method
TL;DR: The Source Parameter Imaging (SPI) method as discussed by the authors computes source parameters from gridded magnetic data using either a 2D sloping contact or a 2-D dipping thin-sheet model and is based on the complex analytic signal solution grids show the edge locations, depths, dips and susceptibility contrasts.
Journal ArticleDOI
High‐resolution detection of geologic boundaries from potential‐field anomalies: An enhanced analytic signal technique
TL;DR: In this article, the outlines of the geologic boundaries can be determined by tracing the maximum amplitudes of an enhanced analytic signal composed of the nth-order vertical derivative values of two horizontal gradients and one vertical gradient.
Journal ArticleDOI
Detection of potential fields source boundaries by enhanced horizontal derivative method
Maurizio Fedi,Giovanni Florio +1 more
TL;DR: In this article, a high-resolution method to image the horizontal boundaries of gravity and magnetic sources is presented (the enhanced horizontal derivative (EHD) method), which is formed by taking the horizontal derivative of a sum of vertical derivatives of increasing order.