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New least-squares algorithm for model parameters estimation using self-potential anomalies
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DOI：10.1016/j.cageo.2008.02.021.png)
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We have developed a new least-squares minimization approach to depth determination from self-potential (SP) data. By defining the anomaly value at the origin and at any two symmetrical points around the origin on the profile, the problem of depth determination from the residual SP anomaly has been transformed into finding a solution to a nonlinear equation of the form f(z) = 0. Procedures are also formulated to estimate the polarization angle, amplitude coefficient and the shape of the buried structure (shape factor). The method is simple and can,be used as a rapid method to estimate parameters that produced SP anomalies. The method is tested on synthetic data with and without random errors. It is also applied to a field example from Turkey. In all cases, the model parameters obtained are in good agreement with actual ones. (C) 2008 Elsevier Ltd. All rights reserved.
Keyword:
Self-potential anomaly
Model parameters determination
Least-squares algorithm
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