| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.284 | 0.828 | 1.696 | 6.906 |
| Arsenic | As (ppm) | 5.691 | 1.785 | 1.839 | 18.247 |
| Calcium | Ca (wt%) | 1.992 | 0.858 | 0.175 | 7.095 |
| Copper | Cu (ppm) | 11.239 | 3.893 | 1.294 | 55.117 |
| Iron | Fe (wt%) | 1.729 | 0.424 | 0.510 | 3.710 |
| Mercury | Hg (ppm) | 0.020 | 0.007 | 0.010 | 0.057 |
| Magnesium | Mg (wt%) | 0.885 | 0.293 | 0.161 | 2.540 |
| Manganese | Mn (ppm) | 292.246 | 113.999 | 91.839 | 826.066 |
| Sodium | Na (wt%) | 0.463 | 0.227 | 0.098 | 1.774 |
| Phosphorus | P (wt%) | 0.057 | 0.015 | 0.016 | 0.098 |
| Lead | Pb (ppm) | 16.434 | 3.771 | 6.078 | 26.658 |
| Selenium | Se (ppm) | 0.372 | 0.175 | 0.100 | 1.153 |
| Titanium | Ti (wt%) | 0.228 | 0.057 | 0.067 | 0.598 |
| Zinc | Zn (ppm) | 53.085 | 25.252 | 17.825 | 289.124 |