Approximating edges of source bodies from magnetic or gravity anomalies

R.J. Blakely; R.W. Simpson

doi:10.1190/1.1442197

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Approximating edges of source bodies from magnetic or gravity anomalies

R.J. Blakely·R.W. Simpson

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Abstract

Cordell and Grauch (1982, 1985) discussed a technique to estimate the location of abrupt lateral changes in magnetization or mass density of upper crustal rocks. The final step of their procedure is to identify maxima on a contoured map of horizontal gradient magnitudes. We attempt to automate their final step. Our method begins with gridded magnetic or gravity anomaly data and produces a plan view of inferred boundaries of magnetic or gravity sources. The method applies to both local surveys and to continent-wide compilations of magnetic and gravity data (e.g., Zietz, 1982; Simpson et al., 1983a; Kane et al., 1982).

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R.J. Blakely, R.W. Simpson. 1986. Approximating edges of source bodies from magnetic or gravity anomalies. https://doi.org/10.1190/1.1442197

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