| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.960 | 1.186 | 5.304 | 10.981 |
| Arsenic | As (ppm) | 6.371 | 2.176 | 1.274 | 13.203 |
| Calcium | Ca (wt%) | 1.626 | 0.838 | 0.337 | 5.138 |
| Copper | Cu (ppm) | 51.267 | 11.609 | 13.151 | 77.685 |
| Iron | Fe (wt%) | 5.047 | 1.096 | 3.327 | 7.346 |
| Mercury | Hg (ppm) | 0.055 | 0.023 | 0.021 | 0.129 |
| Magnesium | Mg (wt%) | 0.800 | 0.299 | 0.270 | 1.954 |
| Manganese | Mn (ppm) | 1128.040 | 252.286 | 668.287 | 1574.660 |
| Sodium | Na (wt%) | 1.131 | 0.456 | 0.177 | 1.978 |
| Phosphorus | P (wt%) | 0.060 | 0.011 | 0.025 | 0.096 |
| Lead | Pb (ppm) | 15.501 | 2.754 | 2.385 | 21.862 |
| Selenium | Se (ppm) | 0.222 | 0.055 | 0.105 | 0.374 |
| Titanium | Ti (wt%) | 0.588 | 0.109 | 0.269 | 0.807 |
| Zinc | Zn (ppm) | 82.608 | 25.253 | 55.563 | 186.393 |