L04_GravAnalysisExamples-page8

L04_GravAnalysisExamples-page8 - Upward continuation...

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Applied Geophysics – Analysis and examples Wave number domain Wavelength filtering 1. Fourier transform the data: f(x,y) Î F(k x ,k y ) 2. set high and low wavelengths to zero: F’(k x ,k y ) 3. Fourier transform back: F’(k x ,k y ) Î f’(x,y) F’ F k k Applied Geophysics – Analysis and examples Continuation filters This project the potential field to either higher or lower elevations
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Unformatted text preview: Upward continuation enhances deeper sources Downward continuation enhances shallow sources Derivative filters Enhance shallow anomalies Used to find edges of anomalies For shallow bodies with vertical edges the max horizontal gradient will occur over the edge...
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