Geology White Papers
Multisite, Multifrequency Tensor Decomposition of Magnetotelluric Data
Overview Accurate interpretation of magnetotelluric data requires an understanding of the directionality and dimensionality inherent in the data, and valid implementation of an appropriate method for removing the effects of shallow, small-scale galvanic scatterers on the data to yield responses representative of regional-scale structures. The galvanic distortion analysis approach advocated by Groom and Bailey has become the most adopted method, and rightly so given that the approach decomposes the magnetotelluric impedance tensor into determinable and indeterminable parts, and tests statistically the validity of the galvanic distortion assumption. As proposed by Groom and Bailey, one must determine the appropriate frequency-independent telluric distortion parameters and geoelectric strike by fitting the seven-parameter model on a frequency-by-frequency and site-by-site basis independently. Whilst this approach has the attraction that one gains a more intimate understanding of the data set, it is rather time-consuming and requires repetitive application.
| Publisher | Geological Survey of Canada | File Format | PDF, requires Acrobat Rdr 5 |
|---|---|---|---|
| Date Published | February 2001 | Downloads | 303 |
| Format | White Papers | ||
| Topics | |||
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