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2D Joint Inversion of Gravity and Magnetic Data of a Potash Ore with the Cross-Gradient Constraint
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 2nd Conference on Geophysics for Mineral Exploration and Mining, Sep 2018, Volume 2018, p.1 - 5
Abstract
The joint inversion of different geophysical data sets can reduce considerably the inherent ambiguity in the inversion of individual data sets. The Cross-gradient method, first developed by Gallardo and Meju (2003) , tries to obtain subsurface images with parallel parameter changes without restricting the parameter values or the magnitude of their variations ( Demirci et al., 2018 ).
In order to do a joint inversion of gravity and magnetic data, we followed the algorithm of Demirci et al. (2018) who added a new regularization parameter into the second term of the parameter correction vector of Gallardo and Meju (2003) . The new regularization parameter controls the contribution of the cross gradient term in the solution.
Available gravity and magnetic data (on a potash source) have been already inverted separately in an integrated approach ( Abedi, 2018 ). In order to acquire two more compatible models a joint inversion method is necessary.