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Table 1 Chemical compositions of the laterite samples collected from the Koh Ker monuments, determined by Activation Laboratories, Ltd.

From: Construction sequence of the Koh Ker monuments in Cambodia deduced from the chemical composition and magnetic susceptibility of its laterites

   Pr. Thom Palace Pr. Thom Outer Encl. Pr. Thom Prang Neang Khmau Enclosure Pr. Pram Enclosure Pr. Chen Outer Encl. Banteay Pir Chan Outer Encl. Srayan Village Srayan Village
Sample no.   2605 2608 2611 2613 3309 3311 3313 2602 2616
Stage   1st 1st 2nd 3rd 3rd 3rd 4th outcrop outcrop
Code   4E-expl 4E-expl 4E-expl 4E-expl 4Litho 4Litho 4Litho 4E-expl 4E-expl
SiO2 % 22.38 32.45 25.01 17.74 19.15 15.57 17.24 20.49 17.59
Al2O3 % 16.05 9.39 8.92 13.69 17.92 13.97 16.00 19.81 16.76
Fe2O3(T) % 45.93 45.22 52.6 48.9 42.13 48.72 49.11 39.27 48.53
MnO % 1.41 2.17 1.25 0.08 0.584 1.787 0.37 0.82 0.76
MgO % 0.12 0.12 0.13 0.06 0.12 0.12 0.08 0.08 0.10
CaO % 0.15 0.08 0.10 0.13 0.10 0.16 0.05 0.14 0.11
Na2O % 0.01 0.01 0.01 < 0.01 0.01 0.01 < 0.01 0.01 0.01
K2O % 0.03 0.05 0.02 0.03 0.06 0.07 0.04 0.07 0.03
TiO2 % 1.23 0.655 0.556 2.14 1.904 1.727 1.643 2.353 1.695
P2O5 % 0.55 0.23 0.21 3.22 1.88 2.47 1.17 2.17 1.76
LOI % 13.05 10.01 10.18 12.89 14.44 14.08 12.99 14.63 12.81
Total % 100.90 100.40 98.98 98.89 98.31 98.69 98.70 99.84 100.10
Au ppb < 5 < 5 < 5 < 5 NA NA NA < 5 < 5
Ag ppm < 0.5 < 0.5 < 0.5 < 0.5 1.6 0.8 1.8 < 0.5 < 0.5
As ppm 13 27 27 7 < 5 8 10 6 10
Ba ppm 702 1610 922 557 807 2705 199 898 654
Be ppm 3 3 2 6 5 7 5 5 6
Bi ppm < 2 < 2 < 2 < 2 < 0.4 0.8 < 0.4 < 2 < 2
Br ppm 2 < 1 < 1 < 1 NA NA NA 1 < 1
Cd ppm 1.0 0.8 0.9 1.1 NA NA NA 1 0.9
Cr ppm 312 150 204 107 670 670 880 624 741
Cs ppm 1.0 < 0.5 < 0.5 < 0.5 0.6 < 0.5 < 0.5 < 0.5 < 0.5
Cu ppm 186 131 187 100 100 140 90 125 97
Hf ppm 4.2 3.1 2 2.1 2.7 1.8 4.7 3.9 4.4
Hg ppm < 1 < 1 < 1 < 1 NA NA NA < 1 < 1
Ir ppb < 5 < 5 < 5 < 5 NA NA NA < 5 < 5
Mo ppm 9 2 2 8 12 16 15 9 9
Ni ppm 237 78 64 250 210 290 160 249 229
Pb ppm 12 16 15 < 5 9 8 9 < 5 6
Rb ppm < 20 < 20 30 < 20 7 5 3 < 20 < 20
S % 0.005 0.002 0.002 0.002 NA NA NA 0.005 0.002
Sb ppm 0.5 0.7 1.2 0.3 < 0.5 < 0.5 < 0.5 0.4 0.8
Sc ppm 20.2 15.8 14.3 23.5 26 25 21 33.2 21.7
Se ppm < 3 < 3 < 3 < 3 NA NA NA < 3 < 3
Sr ppm 34 36 16 1214 872 834 245 1168 613
Ta ppm < 1 < 1 < 1 2 1.4 1.7 1.6 3 1
Th ppm 3.9 1.8 1.1 7.8 9.4 9.0 6.5 9.1 6.6
U ppm 2.6 1.8 1.1 2.5 4.3 4.9 3.8 3.8 3.7
V ppm 749 923 1698 381 440 495 563 403 507
Y ppm 9 18 12 52 41 45 20 60 42
Zn ppm 80 38 36 128 120 150 100 122 88
Zr ppm 192 185 108 138 159 83 208 185 219
La ppm 18.7 18.1 6.7 136 147 133 79.8 165 148
Ce ppm 275 113 51 193 270 274 157 243 218
Nd ppm 8 21 9 75 106 102 58 103 92
Sm ppm 2.5 5.7 2.3 16.5 20.7 20.1 11.2 22.1 18.5
Eu ppm 0.8 1.7 0.8 5.4 6.9 6.79 3.56 7.5 6.3
Tb ppm < 0.5 0.7 < 0.5 1.5 2.4 2.5 1.3 1.7 1.8
Yb ppm 1.1 3.1 1.8 2.9 2.5 4.6 2.0 3.1 2.9
Lu ppm 0.17 0.38 0.25 0.4 0.34 0.61 0.27 0.37 0.36