| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.927 | 0.337 | 3.719 | 6.189 |
| Arsenic | As (ppm) | 4.520 | 0.693 | 2.576 | 7.315 |
| Calcium | Ca (wt%) | 1.718 | 0.450 | 0.957 | 4.267 |
| Copper | Cu (ppm) | 13.989 | 2.747 | 5.999 | 26.781 |
| Iron | Fe (wt%) | 1.952 | 0.235 | 1.558 | 3.189 |
| Mercury | Hg (ppm) | 0.017 | 0.004 | 0.010 | 0.029 |
| Magnesium | Mg (wt%) | 0.733 | 0.111 | 0.479 | 1.126 |
| Manganese | Mn (ppm) | 440.340 | 40.502 | 323.014 | 592.889 |
| Sodium | Na (wt%) | 0.884 | 0.076 | 0.644 | 1.140 |
| Phosphorus | P (wt%) | 0.084 | 0.008 | 0.066 | 0.119 |
| Lead | Pb (ppm) | 17.132 | 2.615 | 8.586 | 23.929 |
| Selenium | Se (ppm) | 0.165 | 0.064 | 0.100 | 0.680 |
| Titanium | Ti (wt%) | 0.252 | 0.029 | 0.210 | 0.397 |
| Zinc | Zn (ppm) | 74.091 | 25.930 | 40.346 | 307.967 |