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http://dx.doi.org/10.7582/GGE.2013.16.1.36

Interpretation of Airborne Magnetic and Radioactive Data for the Uranium Deposit in Geumsan Area  

Shin, Eun-Ju (Technology Business Team, Korea Resources Corporation)
Ko, Kwangbeom (Technology Business Team, Korea Resources Corporation)
An, Dongkuk (Technology Business Team, Korea Resources Corporation)
Han, Kyeongsoo (Technology Business Team, Korea Resources Corporation)
Publication Information
Geophysics and Geophysical Exploration / v.16, no.1, 2013 , pp. 36-44 More about this Journal
Abstract
We conducted the airborne magnetic and radiometric survey for the characterization of the black shale related and pyrometamorphic uranium deposits distributed in Geumsan area. For the successful characterization of the uranium deposits, the general geological and structural geological features were investigated based on the lithological and linear feature analysis to individual magnetic and radiometric data as the first step. Lithological analysis from the magnetic reduction to the pole and downward continuation map revealed that prominent positive anomalies caused by black and dark gray slate member were clearly recognized as magnetic sources. These results indicate that magnetic survey, even though it is not a direct method for the detection of uranium, can be a useful tool in uranium detection. By the linear feature analysis based on 2nd vertical derivative and curvature map, two linearments corresponded the gray hornfels and black slate member were extracted and in succession, the additional uranium potential zone was inferred. Final discrimination whether uranium-rich or not was confirmed by radiometric and uranium anomaly map. From these analysis, we finally concluded that uranium deposit originated by pyrometamorphic process was confined near the intrusive area only. On the contrary, it was found that black shale related uranium deposit is distributed and extended through out the entire survey area with south-west to north-east direction. In addition, from the linear feature analysis based on radiometric total anomaly map, the typical discontinuous characteristics were recognized in areas where uranium-contained linearments cross the faults. From the above discussion, we concluded that airborne magnetic and radiometric survey are complementary to each other. So it is preferable to carry out simultaneously for the efficient data processing and fruitful interpretation.
Keywords
Ogcheon Super Group; Black shale related uranium deposit; Black Slate; Airborne magnetic survey; Airborne radiometric survey; Magnetic anomaly; radiometric anomaly; Lithological analysis; Linear feature analysis; 2nd vertical derivative; Curvature;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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