| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.089 | 0.274 | 5.930 | 7.854 |
| Arsenic | As (ppm) | 3.765 | 0.661 | 2.343 | 6.951 |
| Calcium | Ca (wt%) | 2.508 | 0.316 | 1.678 | 3.978 |
| Copper | Cu (ppm) | 15.703 | 5.628 | 3.624 | 50.890 |
| Iron | Fe (wt%) | 4.671 | 0.647 | 3.409 | 7.152 |
| Mercury | Hg (ppm) | 0.012 | 0.005 | 0.005 | 0.039 |
| Magnesium | Mg (wt%) | 1.143 | 0.167 | 0.857 | 1.847 |
| Manganese | Mn (ppm) | 745.344 | 81.325 | 591.169 | 1114.490 |
| Sodium | Na (wt%) | 1.801 | 0.200 | 1.300 | 2.472 |
| Phosphorus | P (wt%) | 0.092 | 0.010 | 0.065 | 0.124 |
| Lead | Pb (ppm) | 19.087 | 3.510 | 11.229 | 24.928 |
| Selenium | Se (ppm) | 0.120 | 0.037 | 0.100 | 0.296 |
| Titanium | Ti (wt%) | 0.691 | 0.123 | 0.436 | 1.253 |
| Zinc | Zn (ppm) | 76.900 | 8.654 | 56.175 | 108.377 |