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Abstract

Summary

This paper is focused on inverting geophysical magnetic data due to simple shape anomalies including thin sheet and cylinder using Occam’s inversion scheme. A significant aspect of using Occam’s inversion is the choice of the regularization parameter controlling the trade-off between the data fidelity and regularization term in the cost function of optimization problem, and consequently, reliable estimation of subsurface models. Two criteria L-curve and weighted generalized cross validation (W-GCV) are considered in order to choose an optimum value of the regularization parameter. The proposed strategy was first tested on two theoretical synthetic models for each of the magnetic simple-shaped structures with different random errors, where a considerable agreement was obtained between the assumed and calculated models. The validity of the technique was also applied to one real data set from Morvarid iron-apatite deposit, in Northwest Iran. The correlation between the results derived by the proposed algorithm and corresponding known geologic features was reasonable.

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/content/papers/10.3997/2214-4609.201414178
2015-10-05
2024-04-28

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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201414178
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Nonlinear Inverse Modeling of Magnetic Anomalies due to Thin Sheets and Cylinders Using Occam’s Method
Conference Proceedings 2015, 1 (2015); https://doi.org/10.3997/2214-4609.201414178
/content/papers/10.3997/2214-4609.201414178
/content/papers/10.3997/2214-4609.201414178
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