IEG 환경지질연구정보센터

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(1) , 36, 4 , 275-284, 2003 Econ. Environ. Geol., 36(4), 275-284, 2003.

(2) . The Study of Natural Background of Geologic Units for Stream Sediments in the Gurye Area Young Seog Park*, Woo Seog Jang and Jong Kyun Kim Dept. of Mineral Resource Engineering, Chosun University, Gwangju 501-759, Korea We collected the samples of stream sediments from primary channels in order to establish natural background of major and minor elements for geologic units in the Gurye area. Stream sediments samples having no possibility of contamination effect and representing drainage basins composed of uniform geology, were collected from April to May in 1999, the chemical analysis of which was carried out. The tolerable level was used to investigate the enrichment degree of harmful elements. The contents of Ni and Cr exceeded the tolerance level in some sections. The tolerance level excess of those elements was regarded as the effect of the metamorphic rock which constituted the bed rock of the area. In order to identify the comprehensive enrichment pattern, the tolerable level was used in calculating the enrichment index. The enrichment index of harmful heavy metals showed that Granite gneiss area is 0.39, Porphyroblastic granite gneiss area 0.32, Biotite gneiss area 0.42, Migmatitic gneiss area 0.41, Tuff area 0.30, Andesite area 0.46, Congromerate area 0.42, and Granite area 0.26. Those results showed that natural background of Gurye area had not been exposed to harmful heavy metal elements.. Gurye area, stream sediments, geologic units, natural background, tolerable level.

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(66) . . General statistics of major elements for stream sediments in the Gurye area(unit in wt.%).. Geologic units. SiO2. Al2O3. Fe2O3. CaO. MgO. Min Max Ggn. Mean S.D. G.M. Min Max Pbgn. Mean S.D. G.M. Min Max Bgn. Mean S.D. G.M. Min Max Mgn. Mean S.D. G.M. Min Max Andesite Mean S.D. G.M. Min Max Tuff Mean S.D. G.M. Min Max Cong. Mean S.D. G.M. Min Max Gr. Mean S.D. G.M.. 49.34 66.77 58.32 3.48 58.21 54.84 60.57 58.46 2.07 58.46 51.77 61.13 57.54 3.39 57.45 44.69 63.02 56.08 5.08 55.85 54.74 63.92 58.80 3.19 58.73 55.72 63.91 60.50 3.84 60.41 54.01 64.86 61.11 6.15 60.90 55.29 67.12 60.78 4.90 60.63. 13.56 24.75 16.41 1.52 16.34 16.32 19.06 17.44 0.85 17.42 15.84 17.70 16.38 0.69 16.37 14.19 19.67 16.19 1.29 16.14 14.99 17.13 15.96 0.68 15.95 14.50 21.19 16.31 3.26 16.09 13.45 15.65 14.25 1.22 14.21 15.65 18.11 17.10 1.13 17.07. 4.03 10.62 6.79 1.32 6.67 5.16 8.56 6.69 1.11 6.61 5.94 7.51 6.84 0.59 6.81 4.35 8.52 6.53 0.89 6.47 4.97 9.10 7.54 1.33 7.43 4.58 6.89 5.39 1.03 5.32 5.44 6.12 5.82 0.35 5.81 3.47 8.31 5.35 2.29 5.00. 0.39 3.09 1.32 0.62 1.19 0.72 2.95 1.67 0.73 1.54 0.61 0.83 0.73 0.09 0.73 0.57 3.00 0.85 0.52 0.78 0.75 3.61 2.36 1.04 2.09 0.61 1.36 0.85 0.35 0.80 0.66 1.16 0.89 0.25 0.87 0.29 1.62 1.03 0.60 0.85. 0.77 3.18 1.61 0.52 1.44 1.14 2.02 1.53 0.37 1.45 0.75 1.70 1.42 0.34 1.38 1.09 2.75 1.50 0.33 1.48 1.17 1.79 1.48 0.22 1.46 1.15 1.35 1.26 0.08 1.25 1.07 1.20 1.14 0.07 1.14 0.50 1.45 0.91 0.44 0.83. K2O 2.32 4.84 3.37 0.55 3.32 2.68 4.85 3.55 0.76 3.48 2.92 4.80 3.50 0.67 3.46 2.82 4.10 3.29 0.38 3.27 1.45 2.76 2.07 0.42 2.03 2.61 3.18 2.92 0.26 2.91 2.63 3.23 2.88 0.31 2.87 2.89 4.28 3.54 0.60 3.50. Na2O. TiO2. MnO. P2O5. 0.59 2.40 1.32 0.40 1.26 1.08 2.65 1.72 0.57 1.65 0.77 1.85 1.10 0.40 1.05 0.80 2.19 1.13 0.33 1.09 0.61 1.72 0.99 0.34 0.95 0.99 1.18 1.06 0.09 1.06 0.56 0.78 0.65 0.11 0.65 1.55 2.81 2.02 0.58 1.96. 0.47 1.24 0.84 0.17 0.83 0.72 1.17 0.88 0.16 0.82 0.62 1.08 0.88 0.18 0.87 0.62 1.14 0.90 0.14 0.89 0.73 1.14 0.95 0.15 0.94 0.78 0.94 0.88 0.07 0.88 0.78 0.80 0.79 0.01 0.79 0.50 1.00 0.72 0.25 0.69. 0.04 0.19 0.10 0.03 0.10 0.07 0.11 0.09 0.01 0.09 0.05 0.12 0.10 0.02 0.09 0.07 0.16 0.10 0.02 0.10 0.14 0.20 0.16 0.02 0.16 0.12 0.15 0.14 0.01 0.14 0.09 0.16 0.12 0.04 0.12 0.04 0.11 0.08 0.04 0.07. 0.06 0.35 0.15 0.06 0.14 0.12 0.21 0.15 0.04 0.15 0.08 0.15 0.12 0.03 0.12 0.09 0.34 0.14 0.05 0.13 0.08 0.21 0.14 0.04 0.13 0.10 0.15 0.13 0.02 0.13 0.10 0.33 0.18 0.13 0.15 0.05 0.15 0.11 0.04 0.10. Ggn.: Granite gneiss, Pbgn.: Porphyroblastic granite gneiss, Bgn.: Biotite gneiss, Mgn.: Migmatitic gneiss, Cong.: Congromerate, Mean : arithmetic average, S.D.: standard deviation, G.M.: geometric mean. ©4% UO 4ci¡% #m FK K" E¥$ 14 b* G 8 U ( 0Ï4 v© ]> Ø] O.. 8 Ø©" v©OU Ô Ö rë-L v©% Ô 1 í" Ö* !. 8U 8 ;E. . . ' $. . # $. +

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(73) . General statistics of minor elements for stream sediments in the Gurye area(unit in ppm).. Geologic units. Ggn.. Pbgn.. Mgn.. Tuff. Andesite. Cong.. Gr.. Be. 710 1720 1222 225 1201 970 1750 1382 288 1355 560 1450 1140 314 1092 980 1640 1283 213 1266 900 1640 1225 308 1196 820 1440 1106 178 1093 1020 1200 1113 90 1110 1150 1330 1247 91 1244. 1.30 5.50 2.05 0.69 1.40 1.50 2.30 1.91 0.32 1.89 1.70 3.20 2.07 0.56 2.02 1.30 2.60 1.91 0.40 1.87 1.10 1.60 1.35 0.21 1.34 1.20 2.20 1.79 0.35 1.76 1.40 1.60 1.47 0.12 1.46 1.20 2.30 1.50 0.54 1.44. Cu 13 39 26 6 25 18 29 23 3 23 18 36 28 5 27 20 37 28 3 28 19 44 26 11 24 14 25 18 3 18 24 36 28 6 28 16 21 18 2 18. Nb 12 37 25 6 24 21 30 24 3 24 26 35 31 2 30 20 33 27 4 27 22 26 24 1 23 20 28 23 2 23 28 30 29 1 28 18 42 28 10 26. Ni 13 54 30 9 28 15 36 24 7 23 17 41 35 9 34 28 47 36 4 35 14 35 20 10 18 10 17 13 2 13 26 31 29 2 28 15 20 17 2 17. Pb 12 33 21 4 21 17 29 23 3 23 18 31 22 4 22 18 29 21 3 21 19 35 23 7 22 19 29 21 3 21 20 28 23 4 23 21 24 22 1 22. Sr. V. Zr. 49 180 87 24 84 48 137 89 35 83 76 94 84 6 84 69 126 90 14 89 75 106 86 13 85 87 234 139 44 133 65 82 75 8 74 51 98 79 20 77. 34 115 67 16 64 48 80 59 12 58 36 90 70 18 67 49 88 71 10 70 56 66 61 4 61 61 115 87 16 86 61 65 63 2 62 31 65 46 14 45. 30 138 60 20 56 36 95 55 20 53 31 67 54 12 52 38 87 59 12 58 62 112 93 23 91 57 116 94 17 92 55 67 60 6 59 59 113 81 22 79. Li 19 54 37 7 36 24 41 33 5 32 27 49 38 7 38 32 54 42 5 42 25 38 32 5 32 20 41 27 7 26 29 36 33 4 33 24 54 36 13 35. Co. Cr. 7 20 14 3 14 9 16 13 4 12 15 18 16 1 16 10 24 16 4 16. 43 235 105 37 99 42 101 71 41 65 92 98 96 3 96 53 111 81 22 78. 13 16 14 1 14 12 14 13 1 13. 38 55 47 7 47 81 99 90 12 90. Cs. Hf. 2.85 5.70 10.80 255.00 6.45 28.84 2.01 44.33 6.14 18.73 3.93 7.88 4.60 27.30 4.27 17.59 0.47 13.73 4.25 14.67 5.90 8.54 6.75 11.80 6.21 10.18 0.47 1.63 6.20 10.09 4.15 5.94 9.90 19.30 7.20 10.24 2.17 4.78 6.90 9.44. 3.15 7.55 4.60 2.02 4.32 5.93 5.52 5.93 0.57 5.91. 5.19 7.81 6.72 1.14 6.65 11.90 28.80 20.35 11.95 18.51. Rb. Sb. Sc. 109 290 184 48 177 130 204 167 52 162 154 206 174 27 172 137 221 177 31 174. 0.33 0.18 2.24 0.43 0.26 0.21 0.22 0.21 0.01 0.21 0.22 0.25 0.24 0.02 0.24 0.20 0.23 0.22 0.01 0.22. 9.05 21.80 15.35 2.87 15.08 11.80 18.70 15.25 4.88 14.85 12.70 14.90 14.00 1.15 13.97 10.80 18.00 13.84 2.30 13.68. Zn. 57 12.20 184 188.00 102 53.25 28 39.95 98 42.02 58 26.40 86 40.80 72 33.60 19 10.18 70 32.82 105 14.90 115 28.90 109 22.47 5 7.07 109 21.66 73 11.40 115 47.40 90 23.36 14 12.07 89 21.09. Pa. 81 128 102 23 100 123 188 155 45 152. 0.20 60.80 15.37 30.29 0.90 0.23 1.20 0.72 0.69 0.53. 0.21 20.80 13.78 9.24 5.94 11.20 13.00 12.10 1.27 12.07. 1 112 74 50 34 207 258 232 36 231. 9.22 65.70 24.96 27.22 17.48 42.60 82.00 62.30 27.86 59.10. . *Blank is no data.. Ba.

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