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

Table 25. Elemental composition of samples selected from Core 15Subsample 15-01 15-02 15-03 15-04 15-13 15-20 AverageLab. No. R21996 R21997 R21998 R21999 R22000 R22001Depth Interval (ft) 0.0-0.9 0.9-1.7 1.7-1.9 1.9-2.0 6.8-8.8 15.0-16.0Horizon A A E B B CSiO 2(%) 81.10 79.72 67.83 62.54 77.37 73.98 73.76Al 2O 3(%) 8.10 8.87 14.07 17.55 11.27 11.89 11.96Fe 2O 3(%) 2.10 3.48 7.06 7.87 2.75 5.41 4.78K 2O (%) 1.52 1.59 1.46 1.40 1.84 1.87 1.61CaO (%) 0.56 0.38 0.38 0.40 0.71 0.55 0.50MgO (%) 0.27 0.34 0.83 1.12 0.58 0.76 0.65Na 2O (%) 1.08 1.09 0.80 0.64 1.10 0.83 0.92TiO 2(%) 0.77 0.80 0.79 0.78 0.77 0.75 0.78P 2O 5(%) 0.09 0.08 0.09 0.10 0.09 0.09 0.09MnO 2(%) 0.16 0.18 0.06 0.07 0.03 0.13 0.10SO 3(%) 0.01 0.01 0.01 0.01 0.01 0.01 0.01Barium 597 531 421 418 502 404 479Chromium 15 33 99 122 45 57 62Copper 22 18 40 43 27 24 29Mercury (µg/kg) 27 18 50 77 30 30 39Nickel 7 7 17 32 17 30 18Lead 19 20 27 29 19 19 22Rubidium 60 56 96 112 93 83 83Strontium 115 106 84 74 125 96 100Vanadium 71 87 136 152 92 99 106Zinc 45 40 93 116 68 81 74Zirconium 411 396 290 242 348 289 329Total C (%) 0.98 0.54 0.69 0.81 0.23 0.10 0.56Inorganic C (%) 0.04 0.05 0.06 0.05 0.05 0.05 0.05Organic C (%) 0.94 0.49 0.63 0.76 0.18 0.05 0.51pH 5.54 4.74 4.50 6.50 7.21 5.7045