boroomand, M., Safari, A., Bahroudi, A. (2015). Magnetic susceptibility as a tool for mineral exploration (Case study: Southern of Zagros Mountains). Int. Journal of Mining & Geo-Engineering, 49(1), 57-66. doi: 10.22059/ijmge.2015.54364

mohammad boroomand; Abdolreza Safari; abbas Bahroudi. "Magnetic susceptibility as a tool for mineral exploration (Case study: Southern of Zagros Mountains)". Int. Journal of Mining & Geo-Engineering, 49, 1, 2015, 57-66. doi: 10.22059/ijmge.2015.54364

boroomand, M., Safari, A., Bahroudi, A. (2015). 'Magnetic susceptibility as a tool for mineral exploration (Case study: Southern of Zagros Mountains)', Int. Journal of Mining & Geo-Engineering, 49(1), pp. 57-66. doi: 10.22059/ijmge.2015.54364

boroomand, M., Safari, A., Bahroudi, A. Magnetic susceptibility as a tool for mineral exploration (Case study: Southern of Zagros Mountains). Int. Journal of Mining & Geo-Engineering, 2015; 49(1): 57-66. doi: 10.22059/ijmge.2015.54364

Magnetic susceptibility as a tool for mineral exploration (Case study: Southern of Zagros Mountains)

^{1}M.Sc. Student of Geodesy, Department of Surveying &Geomatics Engineering, College of Engineering, University of Tehran, Tehran, Iran

^{2}Associate Professor, Department of Surveying &Geomatics Engineering, College of Engineering, University of Tehran, Tehran, Iran

^{3}Assistant Professor, Faculty of Mineral Engineering, College of Engineering,University of Tehran, Tehran, Iran

Abstract

Magnetic susceptibility has been extensively used to determine the magnetic properties of rocks for different applications, such as hydrocarbon or mineral explorations. This magnetic quantity can be directly measured in an accurate but time-consuming operation, or it can be mathematically approximated using a reliable procedure to achieve a desired accuracy. The Poisson theory is one of the most well-known approaches which provide a meaningful relationship between the earth’s gravity and magnetic fields to derive the magnetic susceptibility. In this approach, the reliability and efficiency of the derived magnetic susceptibility depends on the method of computation of the gravity gradient tensor. We investigated two different methods of determination of gradient tensor; different distance method and Fourier transform technique. From the investigation, the Fourier transform method was more consistent with the geological features which led to more reliable information required for mineral explorations. The performance of the Poisson theory, the different distance method, and the Fourier transform was investigated in the coastal Fars, in Iran. This was highly disposing for geological and mineral features. Salt domes in the study area were detected and results compared with the available geological map.

Telford, W.M., Geldart,L.P.,&Sheriff,R.E. (1990). Applied Geophysics.2nded.Cambridge U. Press, Cambridge, U.K. [2] Bleil, V., & Petersen, N.(1982). Magnetic properties of natural minerals.Paramagnetism. In: Landolt-Boernstein, Numerical data and functional relationships in science and technology,Springer Verlag Berlin, Group V, 1b, pp. 312-320. [3] Dortman, N.B.(1984). Physical properties of rocks and mineral deposits (in Russian).Nedra, Moscow. [4] Cisowski, S.M., & Fuller, M.D.(1987). The generation of magnetic anomalies by combustion metamorphism of sedimentary rock, andits significance to hydrocarbon exploration. Geol. Soc. Amer. Bull., 99, pp. 21-29. [5] Nawrocki J., Wojcik A., & A. Bogucki. (1996).The magnetic susceptibility record in Polish and Ukrainian loess-palaeosol sequences conditioned by palaeoclimate. Boreas 25, pp. 161-169. [6] Evans M. E., & Heller F. (2003). Environmental magnetism. Principles and Applications of Enviromagnetics, Academic Press, Elsevier, pp. 293. [7] Plimer, I.R.(1985). Submarine exhalative ores.Geol. Survey of Czechoslovakia, pp. 394, Prague. [8] Ellwood, B.B., & Wenner, D.B.(1981). Correlation of magnetic susceptibility with 180/160 data in late orogenic granites of the southern Appalachian Piedmont.Earth Planet. Sci. Lett., 54, pp. 200-202. [9] Rochette, P.(1987a). Magnetic susceptibility ofthe rock matrix related to magnetic fabric studies. J. Struct. Geol., 9, pp. 1015-1020. [10] Hrouda, F., & Kahan, Š. (1991). The magnetic fabric relationship between sedimentary and basement nappes in the High Tatra Mountains, N. Slovakia. J. Struct. Geol., 13, pp. 431-442. [11] Heller F., Strzyszcz Z., & T. Magiera. (1998). Magnetic record ofindustrial pollution in forest soils of Upper Silesia.Jour. Geopfys. Res. 103, pp. 17767-17774. [12] Müllerová, J., & Müller, K.(1972). Demonstration of the existence of two lava flows in the VelkýRoudný at SlezskáHarta (in Czech). Sbor.věd. prac. VŠB, 18, pp. 97-100. Ostrava. [13] Grant, F. S., & West, G. F.(1965).Interpretation theory in applied geophysics, McGraw-Hill, New York, NY. [14] Chandler, V. W., & Malek, K. C.(1991).Movingwindow Poisson analysis of gravity and magnetic data from the Penokeanorogen.east-central Minnesota, Geophysics, 56, pp. 123-132. [15] Chandler, V. W., Koski, J. S., Hinze, W. J., & Braille, L. W.(1981). Analysis of multisource gravity and magnetic anomaly data sets by moving-window application of Poisson theorem, Geophysics, 46, pp. 30-39. [16] Cordell, L., & Taylor, P. T.(1971). Investigation of magnetization and density of a North American seamount using Poisson’s theorem. Geophysics, 36, pp. 919-937. [17] Garland, G. D.(1951).Combined analysis of gravity and magnetic anomalies. Geophysics, 16, pp. 51-62. [18] Mendonca, C. A.(2004). Automatic determination of the magnetization to density Boroomand et al. / Int. J. Min. & Geo-Eng., Vol.49, No.1, June 2015 66 ratio and magnetization inclination from the joint interpretation of 2D gravity and magnetic anomalies, Geophysics, 69, pp. 938-948. [19] Doo, W. B., Hsu, S. K., Tsai, C. H., & Huang, Y. S.(2009)Using analytic signal to determine magnetization/density ratios of geological structures.Geophys. J. Int., 179, pp. 112-124. [20] Mendonca, C. A., Meguid, M. M. A.(2008).Programs to compute magnetization to density ratio and the magnetization inclination from 3-D gravity and magnetic anomalies. Computer and Geosciences, 34, pp. 603-610. [21] Hildebrand, T.G.(1985). Magnetic terranes in the central United States determined from the interpretation of digital data, inThe Utility of Gravity and Anomaly Maps,ed. Hinze, W.J., Soc. Exploration Geophysics, Tulsa,pp. 248–266. [22] Alamdar, K., Ansari, A. H., &Kamkare-Rouhani, A. (2011). Using analytic signal in determination of the magnetization to density ratio (MDR) of the geological bodies. Earth and Space Physics journal, 38(2), pp. 167-182. [23] Jekeli, C.,Erkan, K., Huang, O.(2010). Gravity vs Pseudo-Gravity: A Comparison Based on Magnetic and Gravity Gradient Measurements. International Association of Geodesy Symposia, 135, pp 123-127. [24] Agarwal, B.N.P., &Lal, T. (1972). A generalized method of computing second derivative of gravity field. Geophysical prospecting, 20, pp. 385-394. [25] Gunn, P.J. (1975).Linear transformations of gravity and magnetic fields. Geophysical Prospecting, 23, pp. 300-312. [26] Mickus, K.L., Hinojosa, J.H. (2001). The complete gravity gradient tensor derived from the vertical component of gravity: a Fourier transform technique. Journal of Applied Geophysics, 46,pp. 159–174. [27] AllahTavakoli, Y., & Safari, A. (2012). Surface Mass-density Determination of the Inversion of Land-based Gravitational Data