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http://dx.doi.org/10.7582/GGE.2014.17.2.049

3D Inversion of Aeromagnetic Data In an Area of Geumsan  

Ko, Kwang-Beom (Technology Innovation Team, Technology Management division, KORES)
You, Young-Jun (Technology Planning Team, Technology Management division, KORES)
Publication Information
Geophysics and Geophysical Exploration / v.17, no.2, 2014 , pp. 49-57 More about this Journal
Abstract
3D magnetic inversion, based on the assemblage of 2D forward modeling and inversion as a practical technique to reflect the a priori information, was conducted to investigate the spatial distribution features of black-shale related and pyrometamorphic uranium deposit and several lithological units of Ogcheon Super Group in an area of Geumsan. By using the 3D visualization technique with suitable susceptibility interval and horizontal slice map, the spatial distribution of magnetic susceptibility corresponded to the black shale related uranium bearing lithological units, Black Slate member was well coincided with a information of uranium deposit. Also, even though it is indirect indicator for the detetction of uranium deposits interbedded in Gray Hornfels member, spatial susceptibility distribution which shows the south-east magnetic linearment corresponding to the Majeon-ri formation and Dark Gray Slate were matched well. From this investigation, we inferred that maximum depth extension which Black Slate member can be separately recognized with respect to adjacent Dark Gray Slate with strong magnetic susceptibility anomaly is about 150m with reference elevation level of 306m. In addition, Majeon-ri formation located south of Black Slate member revels relatively high magnetic susceptibility range but shows high spatial susceptibility fluctation. And, as an intrusive rocks, Jurassic Biotite Granite shows relatively low magnetic susceptibility characteristics. On the contrary, Cretaceous granite distributed in soutthern part of the study area shows the relatively high susceptibility distribution.
Keywords
a priori information; black-shale related; 3D magnetic inversion; 2D numerical modeling; magnetic susceptibility; Black Slate; Gray Hornfels;
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Times Cited By KSCI : 4  (Citation Analysis)
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1 Shin, E. J., Ko, K. B., and Han, K. S., 2013, Interpretation of Airborne Magnetic and Radioactive Data for the Uranium Deposit in Geumsan Area, Jigu-Mulli-wa-Mulli-Tamsa, 16, 36-44.   과학기술학회마을   DOI
2 Van der Sluis, A., and Van der Vorst, H. A., 1987, Numerical solutions of large, sparse linear algebraic systems arising from tomographic problems, in Norlet, G., Ed. Seismic Tomography, 49-83.
3 Williams, N. C., 1999, Geologically-constrained UBC-GIF gravity and magnetic inversions with examples from the Agnew-Wiluna Greenstone Belt, Western Australia, Ph D's Thesis, University of British Columbia, Canada.
4 Yoo, I. K., 2010, Uranium Resources and Geophysical Review for the Uranium Deposits, Journal of Korean Society for Geosystem Engineering, 47, 99-118.   과학기술학회마을
5 Li, Y., and Oldenburg, D. W., 2003, Fast inversion of large-scale magnetic data using wavelet transforms and logarithmic barrier method, Geophysical Journal International, 152, 251-265.   DOI   ScienceOn
6 Shin, D. B., and Kim, S. J., 2011, Geochemical Characteristics of Black Slate and Coaly Slate from the Uranium Deposit in Deokpyeong Area, Economic and Environmental Geology, 44, 373-386.   과학기술학회마을   DOI
7 Kim, H. J., Song, Y. H., and Lee, K. H., 1999, Inequality constraint in least-squares solution of geophysical data, Earth Planets Space, 51, 255-259.   DOI
8 Kim, I. S., 2012, Personal communication.
9 Ko, K. B., Jung, S. W., and Han, K. S., 2013, A 3D magnetic inversion software based on algebraic reconstruction technique and assemblage of the 2D forward modeling and inversion, Jigu-Mulli-wa-Mulli-Tamsa, 16, 27-35.   과학기술학회마을   DOI
10 Korea Resources Corporation, 2009, Detailed Survey Report (Uranium: Daejeon).
11 Lelievre, P. G., 2003, Integrating geologic and geophysical data through advanced constrained inversions, Ph.D's Thesis, University of British Columbia, Canada.
12 Li, Y., and Oldenburg, D. W., 1996, 3-D inversion of magnetic data, Geophysics, 61, 394-408.   DOI