| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.326 | 0.303 | 6.477 | 8.518 |
| Arsenic | As (ppm) | 8.695 | 2.579 | 3.180 | 16.884 |
| Calcium | Ca (wt%) | 1.733 | 0.724 | 0.795 | 3.808 |
| Copper | Cu (ppm) | 39.648 | 16.462 | 16.496 | 76.072 |
| Iron | Fe (wt%) | 5.693 | 1.590 | 3.631 | 9.576 |
| Mercury | Hg (ppm) | 0.033 | 0.014 | 0.011 | 0.096 |
| Magnesium | Mg (wt%) | 1.313 | 0.634 | 0.587 | 3.086 |
| Manganese | Mn (ppm) | 1139.880 | 105.477 | 812.860 | 1611.790 |
| Sodium | Na (wt%) | 1.128 | 0.109 | 0.779 | 1.456 |
| Phosphorus | P (wt%) | 0.093 | 0.030 | 0.020 | 0.148 |
| Lead | Pb (ppm) | 15.445 | 3.226 | 7.570 | 21.786 |
| Selenium | Se (ppm) | 0.304 | 0.155 | 0.117 | 0.889 |
| Titanium | Ti (wt%) | 0.744 | 0.063 | 0.619 | 1.007 |
| Zinc | Zn (ppm) | 99.269 | 11.299 | 75.159 | 127.719 |