| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.708 | 0.491 | 5.253 | 9.721 |
| Arsenic | As (ppm) | 14.205 | 9.474 | 2.621 | 93.396 |
| Calcium | Ca (wt%) | 3.846 | 2.070 | 0.997 | 14.281 |
| Copper | Cu (ppm) | 17.836 | 6.760 | 3.744 | 111.109 |
| Iron | Fe (wt%) | 3.294 | 0.796 | 0.953 | 11.812 |
| Mercury | Hg (ppm) | 0.085 | 0.370 | 0.010 | 12.345 |
| Magnesium | Mg (wt%) | 1.078 | 0.371 | 0.364 | 2.746 |
| Manganese | Mn (ppm) | 715.714 | 162.139 | 212.709 | 2185.310 |
| Sodium | Na (wt%) | 2.337 | 0.403 | 1.025 | 5.518 |
| Phosphorus | P (wt%) | 0.091 | 0.025 | 0.043 | 0.223 |
| Lead | Pb (ppm) | 22.412 | 7.639 | 6.927 | 133.365 |
| Selenium | Se (ppm) | 0.555 | 0.791 | 0.100 | 11.037 |
| Titanium | Ti (wt%) | 0.399 | 0.126 | 0.126 | 2.152 |
| Zinc | Zn (ppm) | 74.343 | 20.372 | 19.634 | 294.242 |