Edge Detection of Magnetic Sources of Eskandian Area Using Theta Map Filter

As one of the inappropriate factors regarding to the mining, one may mention environmental destructive effects that follows from various factors. Naturally, the accurate knowledge of the position, shape and spread of mineral mass can play an important role in reducing these destructive effects. Therefore, it can be basis of an accurate planning to the extraction of the mineral mass. On the other hand, using geophysical methods such as geomagnetic can give us useful information about the position, shape and spread of mineral mass, without any inappropriate environmental influence. So, in order to recognize position of mass magnetic in Eskandian area (one of the southern cities of Salmas, west Azerbaijan, Iran) the causative sources of magnetic anomalies situated in Eskandian using geomagnetic method, have been studied. Initial studies and field observations of the under study area indicate that diffusion of fluid, consisting of the elements iron and titanium within the area fractures has caused mineralization magnetic and titan. According to the initial impression of the area, produced synthetic magnetic field data consists of three dikes with different depths and in order to edge detection of the causative sources, performance of various filters such as the horizontal and vertical derivative, analytical signal, extended analytical signal and theta map have evaluated. Estimates indicate that the theta map can simultaneously recognize the edges of the shallow and deep sources, with higher accuracy in comparison with the other filters. In the sequel, after applying each of the above mentioned filters on real data of Eskandian area, the results indicate that there are three magnetic mass with different depth position in the under study area. We point out this fact once again that the theta map can recognize the edges of the sources, with higher accuracy.