| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.017 | 0.610 | 4.997 | 7.485 |
| Arsenic | As (ppm) | 13.788 | 2.781 | 10.221 | 21.430 |
| Calcium | Ca (wt%) | 1.103 | 0.266 | 0.648 | 1.632 |
| Copper | Cu (ppm) | 21.859 | 3.078 | 15.910 | 27.073 |
| Iron | Fe (wt%) | 3.588 | 0.226 | 3.102 | 4.148 |
| Mercury | Hg (ppm) | 0.065 | 0.014 | 0.048 | 0.104 |
| Magnesium | Mg (wt%) | 0.535 | 0.052 | 0.439 | 0.628 |
| Manganese | Mn (ppm) | 1040.600 | 317.516 | 609.130 | 1697.990 |
| Sodium | Na (wt%) | 0.521 | 0.021 | 0.475 | 0.564 |
| Phosphorus | P (wt%) | 0.070 | 0.003 | 0.065 | 0.079 |
| Lead | Pb (ppm) | 29.166 | 1.847 | 25.762 | 32.230 |
| Selenium | Se (ppm) | 0.878 | 0.281 | 0.504 | 1.645 |
| Titanium | Ti (wt%) | 0.326 | 0.025 | 0.279 | 0.388 |
| Zinc | Zn (ppm) | 83.417 | 3.450 | 76.248 | 89.238 |