Qualitative interpretation of magnetic anomalies of Tikmehdash area using variogram analysis

Regional - local (residual) anomaly separation has always been one of the crucial steps in magnetic data interpretation. Therefore, a variety of methods has been proposed for this issue, mostly based on Fourier transform. The focus of this research is to use the spatial filtering method to map the regional and local anomalies individually. For this purpose, factorial kriging (FK) method was applied on the magnetic data obtained from Tikmehdash area in northwest of Iran. The results of applying the FK method on the data were compared with the results of using upward continuation on the same data to evaluate the efficiency of the method. Besides, the FK method has been used alongside high-pass filtering to investigate local anomalies. Consequently, the advantages of using the FK method were recognized. The results of this study show the superiority of the FK method to identify the faults in the area that were not evident in the total intensity magnetic map. Overall, we introduced a robust and solid method for separation of magnetic anomalies that can be utilized for further studies.