Table 1 Trace element contents in the bottom sediments of the Bratsk Reservoir, versus their content in the natural environment of the Baikal region, as well as calculated anomaly ratio (AR).
Element | Content [ppm] | Percentage abundance in the Earth’s crust42 [ppm] | Average content in the natural environment of the Baikal region [ppm] | AR | |||
|---|---|---|---|---|---|---|---|
average | max | min | |||||
Be | 1.30 | 2.00 | 0.80 | 2.10 | 2.0 | — | 0.63 |
Co | 18.10 | 28.00 | 12.20 | 17.30 | 9.0 | 19.00 | 2.01 |
Cr | 95.30 | 176.00 | 45.10 | 92.00 | 80.0 | 120.00 | 1.19 |
Cs | 2.70 | 5.00 | 1.11 | 4.90 | 6.2 | 5.00 | 0.44 |
Cu | 31.30 | 44.00 | 15.70 | 28.00 | 29.0 | — | 1.08 |
La | 28.30 | 41.90 | 14.30 | 31.00 | 35.2 | 58.00 | 0.80 |
Mn | 717.60 | 1200.00 | 424.00 | 1000.00 | 685.0 | 945.00 | 1.05 |
Mo | 0.80 | 2.09 | 0.35 | 1.10 | 8.3 | 1.40 | 0.10 |
Ni | 68.00 | 97.00 | 45.30 | 47.00 | 32.0 | 84.00 | 2.12 |
Pb | 13.80 | 19.00 | 8.18 | 17.00 | 11.0 | 19.00 | 1.25 |
Rb | 42.60 | 100.00 | 16.00 | 84.00 | 42.80 | 80.00 | 1.00 |
Sc | 10.70 | 20.30 | 4.70 | 14.00 | 11.00 | 13.00 | 0.97 |
Sr | 140.40 | 250.00 | 45.00 | 320.00 | 210.0 | 320.00 | 0.67 |
Th | 5.70 | 8.90 | 1.20 | 10.50 | 3.8 | 10.00 | 1.49 |
V | 83.90 | 138.00 | 49.00 | 97.00 | 62.0 | 160.00 | 1.35 |
Y | 18.00 | 29.00 | 11.50 | 21.00 | 22.5 | – | 0.8 |
Zn | 89.50 | 108.00 | 62.80 | 67.00 | 41.0 | 88.00 | 2.18 |
