| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.770 | 0.769 | 1.822 | 6.707 |
| Arsenic | As (ppm) | 4.467 | 1.865 | 2.670 | 13.354 |
| Calcium | Ca (wt%) | 1.098 | 1.445 | 0.132 | 7.754 |
| Copper | Cu (ppm) | 52.518 | 96.621 | 4.043 | 510.958 |
| Iron | Fe (wt%) | 1.330 | 0.327 | 0.813 | 2.676 |
| Mercury | Hg (ppm) | 0.015 | 0.008 | 0.010 | 0.044 |
| Magnesium | Mg (wt%) | 0.242 | 0.096 | 0.132 | 0.668 |
| Manganese | Mn (ppm) | 192.952 | 104.799 | 100.233 | 779.689 |
| Sodium | Na (wt%) | 0.347 | 0.280 | 0.181 | 1.942 |
| Phosphorus | P (wt%) | 0.023 | 0.015 | 0.009 | 0.102 |
| Lead | Pb (ppm) | 11.631 | 4.851 | 7.046 | 26.113 |
| Selenium | Se (ppm) | 0.160 | 0.126 | 0.100 | 0.756 |
| Titanium | Ti (wt%) | 0.200 | 0.034 | 0.123 | 0.380 |
| Zinc | Zn (ppm) | 111.765 | 168.195 | 21.327 | 902.909 |