| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.774 | 0.494 | 4.666 | 7.315 |
| Arsenic | As (ppm) | 1.599 | 0.377 | 0.936 | 2.891 |
| Calcium | Ca (wt%) | 0.934 | 0.875 | 0.101 | 3.624 |
| Copper | Cu (ppm) | 11.043 | 2.979 | 5.164 | 22.104 |
| Iron | Fe (wt%) | 3.057 | 1.005 | 1.288 | 6.582 |
| Mercury | Hg (ppm) | 0.071 | 0.042 | 0.017 | 0.266 |
| Magnesium | Mg (wt%) | 0.397 | 0.337 | 0.086 | 1.662 |
| Manganese | Mn (ppm) | 1066.740 | 211.469 | 605.096 | 1715.590 |
| Sodium | Na (wt%) | 0.523 | 0.201 | 0.151 | 0.923 |
| Phosphorus | P (wt%) | 0.042 | 0.014 | 0.016 | 0.070 |
| Lead | Pb (ppm) | 44.663 | 8.746 | 25.617 | 70.960 |
| Selenium | Se (ppm) | 0.161 | 0.079 | 0.100 | 0.541 |
| Titanium | Ti (wt%) | 0.809 | 0.186 | 0.440 | 1.398 |
| Zinc | Zn (ppm) | 34.585 | 7.329 | 17.393 | 54.203 |