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http://dx.doi.org/10.9720/kseg.2022.2.295

Occurrence of Radioactive Minerals and U-Th Geochemistry of the Weolaksan and Sokrisan Granite in the Central Ogcheon Belt  

Hwang, Jeong (Department of Construction Safety Engineering, Daejeon University)
Publication Information
The Journal of Engineering Geology / v.32, no.2, 2022 , pp. 295-310 More about this Journal
Abstract
The Weolaksan and Sokrisan granites yield high SiO2 and alkali (Na2O+K2O) contents and low CaO and P2O5 contents. The Al saturation index is ≥1.3, which indicates that the granites are peraluminous. The mean U and Th contents are 8.3 and 39.3 ppm, respectively, higher than typical Mesozoic granites in South Korea and about twice the global mean for granitic rocks. The causes of such high radioelement contents are related to high degrees of fractionation and the crustal origin of the granites. U- and Thbearing radioactive minerals occur in the granites include zircon, thorite, monazite, xenotime, fergusonite and uraninite. The fact that the mean Th/U ratio of the granites (5.4) is similar to the global average crustal value suggests that the radioelement contents of granite were controlled by the crustal source material. Given the correlation of Zr, Y, and heavy rare earth elements for U and Th, radioelements are more likely hosted by xenotime than zircon and monazite.
Keywords
mesozoic granite; U-Th geochemistry; Th/U ratio; radioactive minerals;
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Times Cited By KSCI : 7  (Citation Analysis)
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1 Lee, M.S., Park, B.S., 1965, The geological map of Hwanggangri sheet (1:50,000), Geological Survey of Korea.
2 Lee, S.G., Shin, S.C., Kim, K.H., Lee, T., Koh, H., Song, Y.S., 2010, Petrogenesis of three cretaceous granites in the Okcheon metamorphic belt, South Korea: Geochemical and Nd-Sr-Pb isotopic constraints, Gondwana Research, 17, 87-101.   DOI
3 Levinson, A.A., 1980, Introduction to exploration geochemistry (2nd edition), Applied Publishing, Wilmette, 924p.
4 Maystrenko, Y.P., Elvebakk, H.K., Ganerod, G.V., Lutro, O., Olesen, O., Ronning, J.S., 2014, 2D structural and thermal models in southeastern Norway based on the recently drilled Arvollskogen borehole and 2D density, magnetic and thermal modelling, Geothermal Energy, 2(15), 1-30.   DOI
5 Jeong, C.H., Kim, D.W., Kim, M.S., Lee, Y.J., Kim, T.S., Han, J.S., Joe, B.U., 2012, Occurrence of natural radioactive materials in borehole groundwater and rock core in the Icheon area, The Journal of Engineering Geology, 22(1), 95-111 (in Korean with English abstract).   DOI
6 Yun, H.S., Lee, Y.S., Hong, S.S., Lee, J.Y., Kim, Y.E., 2014, Geochemical consideration of the cretaceous granite batholith in the mid Ogcheon belt, Proceedings of the Annual Joint Conference, the Petrological Society of Korea and the Mineralogical Society of Korea, Busan, Korea, 96-98.
7 Shand, S.J., 1943, Eruptive rocks; Their genesis, composition, classification, and their relation to ore deposits with a chapter on meteorite (revised second edition), Hafner Publishing Co., New York, 360p.
8 Lee, S.Y., Baik, M.H., 2007, Characters of fracture-filling minerals in the KURT and their significance, Journal of Mineralogical Society of Korea, 20(3), 165-173 (in Korean with English abstract).
9 NIER, 2010, Study on the radionuclide concentrations in the groundwater, NIER Report (in Korean).
10 Rollinson, H.R., 1993, Using geochemical data: evalution, presentation, interpretation, Routledge, London, 384p.
11 Smethurst, M.A., Strand, T., Sundal, A.V., Rudjord, A.L., 2008, Large scale radon hazard evaluation in the Oslofjord region of Norway utilizing indoor radon concentrations, airborne gamma ray spectrometry and geological mapping, Science of the Total Environment, 407, 379-393.   DOI
12 Taylor, S.R., McLennan, S.M., 1985, The continental crust; Its composition and evolution, Blackwell, Oxford, 349p.
13 You, B.W., Lee, G.J., Koh, S.M., 2012, Mineralogy and mineral-chemistry of REE minerals occurring at mountain Eorae, Chungju, Journal of Economic and Environmental Geology, 45(6), 643-659 (in Korean with English abstract).   DOI
14 Lee, C.H., Kim, J.H., 1972, The geological map of Goesan sheet (1:50,000), Geological Survey of Korea.
15 Shin, D.B., Kim, S.J., 2011, Geochemical characteristics of black slate and coaly slate from the uranium deposit in Deokpyeong area, Journal of Economic and Environmental Geology, 44, 373-386 (in Korean with English abstract).   DOI
16 Dickin, A.P., 2005, Radiogenic isotope geology, Cambridge University Press, Cambridge, 512p.
17 Jeong, C.H., Kim, M.S., Lee, Y.J., Han, J.S., Jang, H.G., Joe, B.U., 2011, Hydrochemistry and occurrence of natural radioactive materials within borehole groundwater in the Cheongwon area, The Journal of Engineering Geology, 21(2), 163-178 (in Korean with English abstract).   DOI
18 Jwa, Y.J., 2004, Possible source rocks of Mesozoic granites in South Korea: Implications for crustal evolution in NE Asia, Transactions of the Royal Society of Edinburgh: Earth Sciences, 95, 181-198.   DOI
19 Kim, J.S., Kim, K.K., Jwa, Y.J., Son, M.S., 2012, Cretaceous to early Tertiary granites and magma mixing in South Korea: Their spatio-temporal variations and tectonic implications (multiple slab window model), Journal of Petrological Society of Korea, 21(2), 203-216 (in Korean with English abstract).   DOI
20 Cuney, M., 2014, Felsic magmatism and uranium deposits, Bulletin Society Geology France, 185(2), 75-92.   DOI
21 Bea, F., 1996, Residence of REE, Y, Th and U in granites and crustal protoliths; implications for the chemistry of crustal melts, Journal of Petrology, 37(3), 521- 552.   DOI
22 Cho, W.H., Baik, M.H., Park, T.J., 2017, Occurrence characteristics and existing forms of U-Th containing minerals in KAERI underground research tunnel (KURT) granite, Journal of Economic and Environmental Geology, 50(2), 117-128 (in Korean with English abstract).   DOI
23 Lee, M.S., Kim, S.W., 1985, Uranium distribution patterns and U-mineral in the U-bearing coaly slate of Ogcheon system, Journal of the Korean Institute Mining Geology, 18, 135-138 (in Korean with English abstract).
24 Alnour, I.A., Ibrahim, N., Hossain, I., 2012, Concentrations of 214Pb, 214Bi in 238U series and 208Tl, 228Ac in 232Th series in granite rock in (Kadugli) Sudan, Indian Journal of Pure and Applied Physics, 50(5), 285-288.
25 Chappell, B.W., 1999, Aluminium saturation in I- and S-type granites and the characterization of fractionated haplogranites, Lithos, 46, 535-551.   DOI
26 Cheong, C.S., Chang, H.W., 1997, Sr, Nd, and Pb isotope systematics of granitic rocks in the central Ogcheon belt, Korea, Geochemical Journal, 31, 17-36.   DOI
27 Hwang, J., Moon, S.H., 2021, Geochemistry of U and Th of mesozoic granites in South Korea: Implications of occurrences of different U-host minerals and dissolved U and Rn between Jurassic and Cretaceous granite aquifers. Geoscience Journal, 25(2), 183-195.   DOI
28 Yun, S.K., 1984, Mineralogical and geochemical studies of uranium deposits of Okchen group in Southwestern district of Taejon, Journal of the Korean Institute Mining Geology, 17(4), 289-298 (in Korean with English abstract).
29 Heaman, L., Parrish, R., 1993, U-Pb geochronology of accessory minerals, In: Heaman, L., Ludden, J.N. (Eds.), Short course handbook on applications of radiogenic isotope systems to problems in geology, Mineralogical Association of Canada, 59-102.
30 Hoskin, P.W.O., Schaltegger, U., 2003, The composition of zircon and igneous and metamorphic petrogenesis, Reviews in Mineralogy and Geochemistry, 53(1), 27-62.   DOI
31 Pagel, M., 1982, The mineralogy and geochemistry of uranium, thorium, and rare-earth elements in two radioactive granites of the Vosges, France, Mineralogical Magazine, 46, 149-161.   DOI
32 Park, M.E., Kim, G.S., 1998, Geochemistry of uranium and thorium deposits from the Kyemyeongsan pegmatite, Journal of Economic and Environmental Geology, 31(5), 365-374 (in Korean with English abstract).
33 Rudlang, T., 2011, Heat flow and deep underground temperature in the Bergen region, MSc thesis, Norwegian University of Science and Technology, Trondheim, 84 p.
34 Wesserburg, G.G., 1964, Relative contribution of uranium, thorium, and potassium to heat production in the earth, Science, 143, 465- 467.   DOI
35 Won, C.G., Lee, H.Y., 1967, The geological map of Danyang sheet (1:50,000), Geological Survey of Korea.
36 Yu, C.D, Wang, K.X., Liu, X.D., Cuney, M., Pan, J.Y., Wang, G., Zhang, L., Zhang, J., 2020, Uranium mineralogical and chemical features of the Na-metasomatic type uranium deposit in the Longshoushan Metallogenic Belt, Northwestern China, Minerals, 2020, 10(4), 335.   DOI
37 Grandstaff, D.E., 1976, A kinetic study of the dissolution of uraninite, Economic Geology, 71(8), 1493-1506.   DOI
38 Hwang, J., Moon, S.H., Ripley, E.M., Kim, Y.H., 2014, Determining uraniferous host rocks and minerals as a source of dissolved uranium in granite aquifers near the central Ogcheon metamorphic belt, Korea, Environmental Earth Science, 72, 4035-4046.   DOI
39 Kim, S.W., 2020, Concentration of radioactive materials for the Phanerozoic plutonic rocks in Korea and its implication, Journal of Economic Environmental Geology, 53(5), 565-583 (in Korean with English abstract).
40 Choo, C.O., 2002, Characteristics of uraniferous minerals in Daebo granite and significance of mineral species, Journal of Mineralogical Society of Korea, 15(1), 11-21 (in Korean with English abstract).
41 Hwang, J., 2013, Occurrence of U-minerals and source of U in groundwater in Daebo granite, Daejeon area, The Journal of Engineering Geology, 23(4), 399-407 (in Korean with English abstract).   DOI
42 IRR (Ionising Radiations Regulations), 1985, Health and safety, Stationery Office Limited, London, 83p.
43 Jeong, G.Y., 2006, Mineralogy and geochemistry of metalliferous black slates in the Okcheon metamorphic belt, Korea: A metamorphic analogue of black shales in the South China block, Mineralum Deposita, 41(5), 469-481.   DOI
44 Kim, N.J., Choi, S.O., Kang, P.C., 1967, The geological map of Mungyeong sheet (1:50,000), Geological Survey of Korea.
45 Streckeisen, A.L., 1976, To each plutonic rock it's proper name, Earth Science Reviews, 12(1), 1-33.   DOI