| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 8.898 | 0.791 | 6.371 | 10.644 |
| Arsenic | As (ppm) | 3.865 | 1.959 | 0.939 | 11.184 |
| Calcium | Ca (wt%) | 2.070 | 0.642 | 0.697 | 4.048 |
| Copper | Cu (ppm) | 30.368 | 7.842 | 15.091 | 53.481 |
| Iron | Fe (wt%) | 6.503 | 1.600 | 3.626 | 10.922 |
| Mercury | Hg (ppm) | 0.071 | 0.025 | 0.015 | 0.158 |
| Magnesium | Mg (wt%) | 1.377 | 0.480 | 0.618 | 3.047 |
| Manganese | Mn (ppm) | 1203.880 | 234.671 | 717.682 | 1909.840 |
| Sodium | Na (wt%) | 1.463 | 0.364 | 0.633 | 2.676 |
| Phosphorus | P (wt%) | 0.085 | 0.029 | 0.014 | 0.254 |
| Lead | Pb (ppm) | 12.220 | 3.112 | 7.062 | 25.989 |
| Selenium | Se (ppm) | 0.273 | 0.160 | 0.100 | 0.896 |
| Titanium | Ti (wt%) | 0.808 | 0.166 | 0.532 | 1.408 |
| Zinc | Zn (ppm) | 115.280 | 16.804 | 77.695 | 170.457 |