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ANALYSIS OF GRAVITY ANOMALIES OF TWO‐DIMENSIONAL FAULTS USING FOURIER TRANSFORMS *
Author(s) -
SHARMA BIJON,
GELDART L. P.
Publication year - 1968
Publication title -
geophysical prospecting
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.735
H-Index - 79
eISSN - 1365-2478
pISSN - 0016-8025
DOI - 10.1111/j.1365-2478.1968.tb01961.x
Subject(s) - geology , fourier transform , fault (geology) , fourier analysis , gravity anomaly , geodesy , geometry , gemology , anomaly (physics) , transform fault , displacement (psychology) , plane (geometry) , discrete fourier transform (general) , amplitude , seismology , short time fourier transform , mathematical analysis , physics , engineering geology , mathematics , optics , tectonics , psychology , condensed matter physics , volcanism , psychotherapist
The Fourier transform formula for a two‐dimensional fault truncating a horizontal bed at an arbitrary angle of inclination is derived. The amplitude spectrum of the Fourier transform is found to give information about the depth to the top of the upper part of the faulted bed and the inclination of the fault‐plane. Under suitable conditions the thickness and the displacement of the bed involved can be obtained. With actual field data, these transforms can be obtained at discrete points by a Fourier analysis of the gravity anomaly. A field example from the Logan fault area near Montreal, Que., Canada, is given.