Background contents of some minor and trace elements in the rocks ...
Background contents of some minor and trace elements in the rocks ... Background contents of some minor and trace elements in the rocks ...
Table 1(continued)Rock groups Be a Sr Ba Sc Ti V Cr Mo W Mn Co Ni Cu Zn Cd Hg Sn Pb As10. Ultrabasic 16 16 15 9 10 1 25 65 7.4 778 50 202 3 1050 99 428 20 96 3 5metamorphites480 617 1101 375 7510 n.d. b 2100 125 2400 66 270 n.d. n.d.n.d.(28 samples) 2 14 16 1 14 13 17 22 511. Basic 0.8 195 122 30 8152 203 106 1 1240 34 50 28.5 61 0.07 2 5 0.5metamorphites 1.6 563 707 45.5 18845 538 717 4.9 n.d. 2440 66.9 189 115 212 n.d.11.3 16.6(271 samples) 24 257 224 45 65 222 249 25230 231 221 150 1191 29 105 112. Intermediate 1 248 454 13.9 6402 156 34.4 1.5 852 13.4 20 20.7 54.8 1 15.5metamorphites777 853 51 10461 237 195 3.4 n.d. 2130 43.9 39 60.5 217 n.d. n.d.51.6 n.d.(57 samples) 6 54 57 18 12 33 46 1136 34 18 16 316 2413. Acid3 189 655 11.1 419 50 33.6 1 30 387 11 10 20 50 2.4 3 20 2.8metamorphites 5 619 1555 21.5 1576 244 235 7.3 48 1440 30.9 95.1 74.2 185 3 n.d. 8.8 58.7(312 samples) 23 281 298 66 21 213 277 55 9 219 207 137 125 187 838 193 414. Carbonate 0.5 126 207 0.7 23 4.3 0.2 232 2.8 5.0 14 17 1 11.5 0.5metamorphites412 567 n.d. 129 77.6 1.7 n.d. 700 22.1 37.9 60.4 92 n.d. n.d.35.7(26 samples) 5 23 19 419 22 813 24 19 21 154 22 115. Low-grade 2.2 85 641 55 35 1.9 610 10 30 9.5 30 10 0.3 2.7 7.5 0.5metam. rocks409 1527 n.d. n.d. 229 93.1 6.3 n.d. 2774 43.3 102 57.9 222 26.9(45 samples) 6 28 3930 38 936 39 41 38 40 2 1 6 36 1All rock types combined (2589 samples) 2 280 506 9.4 2956 72.9 24.8 1 0.7 650 10 17 20 45 2.3 0.03 3 21 2.25.9 1015 1675 34.8 13320 378 204 4.9 3.5 2270 48.7 106 105 153 5.8 0.56 14.6 63.6 7.4379 1905 2027 492 281 1402 1916 719 190 1816 1727 1379 1338 1566 63 30 580 1494 139aFor each element: row I (bold) – mean value (median); row II – upper background threshold determined by formula (1) at N>15 or by 95 percentile at 15 ≥ N ≥ 8; row III – number ofsamples analyzed for the element (N); b No data for the element70
Table 2Statistical characteristics of the contents of the elements studied in all rocks on Bulgarian territoryСharacteristics Be Sr Ba Sc Ti V Cr Mo W Mn Co Ni Cu Zn Cd Hg Sn Pb AsElement determinations number (N) 379 1905 2027 492 281 1402 1916 719 190 1816 1727 1379 1338 1566 63 30 580 1494 139Minimum content, ppm 0.3 3 0.5 0.01 20 0.5 0.18 0.01 0.1 5 0.03 0.2 0.002 1 0.1 0.0002 0.15 0.46 0.15Maximum content, ppm 10 6500 5000 85.6 21594 650 4516 300 50 3330 197 2852 804 300 10 0.5 30 246 36Average (x), ppm 2.52 347 612 11.3 3807 109108 2.76 3.59 743 15.7 77.3 32.0 53.1 2.76 0.12 4.23 25.8 3.49Standard error of the average (S), ppm 0.10 6.89 12.1 0.46 215 2.95 7.63 0.46 0.61 12.4 0.48 8.05 1.23 1.06 0.30 0.03 0.16 0.58 0.42Confidence level (λ0.05), ppm 0.19 13.5 23.8 0.91 424 5.7915.0 0.91 1.20 24.2 0.94 15.8 2.42 2.09 0.60 0.06 0.32 1.15 0.84Standard deviation (σ), ppm 1.85 301 54710.2 3612 110 334 12.5 8.37 526 20.0 299 45.1 42.1 2.39 0.17 3.92 22.6 4.99Coefficient of variation (V), % 73.6 86.7 89.4 90.3 94.9 102 310 451 233 70.8 127 387 141 79.3 86.5 142 92.5 87.6 143Kurtosis (E) 3.60 93.9 8.64 6.98 1.68 3.32 50.5 459 11.8 1.54 19.9 41.7 103 5.48 2.28 0.26 7.88 19.0 18.8Skewness (A) 1.60 5.61 2.25 1.92 1.28 1.73 6.50 19.9 3.39 1.06 3.59 6.42 7.6 1.771.41 1.34 2.35 3.04 4.01Percentile 25 (I quartile Q1), ppm 1 157 230 3.6 838 27 8 0.5 0.41 310 4 6 8 241.6 0.005 1.45 10 1.2Median (Md, 50р), ppm 2 280 506 9.36 2956 72.9 24.8 1 0.7 650 10 17 20 45 2.3 0.03 3 21 2.2Percentile 75 (III quartile Q3), ppm 3 470 808 15.9 5634 152 71 2 1.43 1070 20 40 42 73 3.2 0.168 6 32 3.55Relative quartile deviation (DQ), % 50.0 49.9 55.7 63.1 74.1 69.8Upper background threshold(UBT0.05), ppm79.7 60.0 55.4 55.0 66.7 73.9 68.0 50.5 32.8 94.2 61.1 52.4 49.55.87 1015 1675 34.8 13320 378 204 4.87 3.53 2270 48.7 106 105 1535.78 0.56 14.6 63.6 7.4271
- Page 1 and 2: GEOLOGICA BALCANICA, 36, 1—2, Sof
- Page 3 and 4: and for all rocks on Bulgarian terr
- Page 5: Table 1Mean contents and upper back
- Page 9 and 10: Fig. 1. Mean values of Be, Sr, Ba,
- Page 11 and 12: Âèíîãðàäîâ, À. Ï. 1962.
Table 2Statistical characteristics <strong>of</strong> <strong>the</strong> <strong>contents</strong> <strong>of</strong> <strong>the</strong> <strong>elements</strong> studied <strong>in</strong> all <strong>rocks</strong> on Bulgarian territoryСharacteristics Be Sr Ba Sc Ti V Cr Mo W Mn Co Ni Cu Zn Cd Hg Sn Pb AsElement determ<strong>in</strong>ations number (N) 379 1905 2027 492 281 1402 1916 719 190 1816 1727 1379 1338 1566 63 30 580 1494 139M<strong>in</strong>imum content, ppm 0.3 3 0.5 0.01 20 0.5 0.18 0.01 0.1 5 0.03 0.2 0.002 1 0.1 0.0002 0.15 0.46 0.15Maximum content, ppm 10 6500 5000 85.6 21594 650 4516 300 50 3330 197 2852 804 300 10 0.5 30 246 36Average (x), ppm 2.52 347 612 11.3 3807 109108 2.76 3.59 743 15.7 77.3 32.0 53.1 2.76 0.12 4.23 25.8 3.49St<strong>and</strong>ard error <strong>of</strong> <strong>the</strong> average (S), ppm 0.10 6.89 12.1 0.46 215 2.95 7.63 0.46 0.61 12.4 0.48 8.05 1.23 1.06 0.30 0.03 0.16 0.58 0.42Confidence level (λ0.05), ppm 0.19 13.5 23.8 0.91 424 5.7915.0 0.91 1.20 24.2 0.94 15.8 2.42 2.09 0.60 0.06 0.32 1.15 0.84St<strong>and</strong>ard deviation (σ), ppm 1.85 301 54710.2 3612 110 334 12.5 8.37 526 20.0 299 45.1 42.1 2.39 0.17 3.92 22.6 4.99Coefficient <strong>of</strong> variation (V), % 73.6 86.7 89.4 90.3 94.9 102 310 451 233 70.8 127 387 141 79.3 86.5 142 92.5 87.6 143Kurtosis (E) 3.60 93.9 8.64 6.98 1.68 3.32 50.5 459 11.8 1.54 19.9 41.7 103 5.48 2.28 0.26 7.88 19.0 18.8Skewness (A) 1.60 5.61 2.25 1.92 1.28 1.73 6.50 19.9 3.39 1.06 3.59 6.42 7.6 1.771.41 1.34 2.35 3.04 4.01Percentile 25 (I quartile Q1), ppm 1 157 230 3.6 838 27 8 0.5 0.41 310 4 6 8 241.6 0.005 1.45 10 1.2Median (Md, 50р), ppm 2 280 506 9.36 2956 72.9 24.8 1 0.7 650 10 17 20 45 2.3 0.03 3 21 2.2Percentile 75 (III quartile Q3), ppm 3 470 808 15.9 5634 152 71 2 1.43 1070 20 40 42 73 3.2 0.168 6 32 3.55Relative quartile deviation (DQ), % 50.0 49.9 55.7 63.1 74.1 69.8Upper background threshold(UBT0.05), ppm79.7 60.0 55.4 55.0 66.7 73.9 68.0 50.5 32.8 94.2 61.1 52.4 49.55.87 1015 1675 34.8 13320 378 204 4.87 3.53 2270 48.7 106 105 1535.78 0.56 14.6 63.6 7.4271
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