A generalized concept of resultant gradient to interpret potential field maps

Autor:	B. N. P. Agarwal, Ranjit K. Shaw
Rok vydání:	1997
Předmět:	Physics Geophysics Amplitude Cuboid Geochemistry and Petrology Point particle Mineralogy Centroid Geometry Filter (signal processing) Anomaly (physics) Magnetic anomaly Gravity anomaly
Zdroj:	Geophysical Prospecting. 45:1003-1011
ISSN:	1365-2478 0016-8025
DOI:	10.1046/j.1365-2478.1997.740310.x
Popis:	The existing concept of the gradient of the potential field anomaly over a 3D source has been generalized. An observed anomaly is modified through a filter based on an assumed source geometry. The first-order derivatives of this modified anomaly in three mutually orthogonal directions form the components of a vector termed the resultant gradient. The gravity anomaly over a point mass, a vertical line mass and the gravity/magnetic anomaly reduced-to-pole over a bottomless right rectangular prism have been suitably modified to yield a specific shape for the amplitude of the resultant gradient in order to decipher the depth of the source centroid/corner. The applicability of the proposed technique is demonstrated by the analyses of a simulated example over a composite source and a real example from published literature with drill-hole information.
Databáze:	OpenAIRE
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