Cores 11 through 26 by Gary B. Dr - University of Illinois at Urbana ...

Table 34. Elemental composition of samples selected from Core 24Subsample 24-01 24-02 24-03 24-04 24-10 24-16 AverageLab. No. R22049 R22050 R22051 R22052 R22053 R22054Depth Interval (ft) 0.0-0.6 0.6-1.2 1.2-1.45 1.45-2.0 6.05-7.0 9.35-9.9Horizon A A B B C 2BSiO 2(%) 81.73 79.83 74.58 73.50 80.94 81.93 78.75Al 2O 3(%) 7.27 9.12 11.65 12.20 8.97 9.07 9.71Fe 2O 3(%) 2.50 3.14 4.83 5.14 3.29 3.28 3.70K 2O (%) 1.88 2.03 2.10 2.15 1.45 1.38 1.83CaO (%) 0.38 0.36 0.45 0.43 0.34 0.23 0.37MgO (%) 0.32 0.45 0.80 0.89 0.46 0.40 0.55Na 2O (%) 0.78 0.75 0.70 0.83 0.63 0.43 0.69TiO 2(%) 0.88 0.91 0.89 0.89 0.72 0.75 0.84P 2O 5(%) 0.11 0.07 0.08 0.09 0.06 0.06 0.08MnO 2(%) 0.16 0.10 0.05 0.05 0.03 0.04 0.07SO 3(%) 0.01 0.01 0.01 0.01 0.01 0.01 0.01Barium 584 581 638 556 382 324 511Chromium ND 28 56 69 39 40 46Copper ND 24 30 33 27 22 27Mercury (µg/kg) 34 34 54 78 10 27 40Nickel ND 6 7 7 21 9 10Lead ND 19 23 25 19 16 20Rubidium ND 73 96 97 74 68 82Strontium 96 97 95 97 95 76 93Vanadium ND 80 106 109 86 78 92Zinc ND 55 78 83 62 48 65Zirconium 489 426 343 338 343 362 383Total C (%) 1.13 0.55 0.39 0.32 0.18 0.18 0.46Inorganic C (%) 0.04 0.04 0.04 0.04 0.03 0.03 0.04Organic C (%) 1.09 0.51 0.35 0.28 0.15 0.15 0.42pH 5.42 6.02 6.00 5.48 5.72 6.42 5.8454