| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.493 | 0.177 | 0.179 | 1.137 |
| Arsenic | As (ppm) | 1.717 | 0.729 | 0.387 | 4.853 |
| Calcium | Ca (wt%) | 0.331 | 0.262 | 0.035 | 1.656 |
| Copper | Cu (ppm) | 2.453 | 1.540 | 1.015 | 9.120 |
| Iron | Fe (wt%) | 0.575 | 0.401 | 0.123 | 3.581 |
| Mercury | Hg (ppm) | 0.020 | 0.012 | 0.010 | 0.097 |
| Magnesium | Mg (wt%) | 0.026 | 0.014 | 0.004 | 0.082 |
| Manganese | Mn (ppm) | 202.940 | 173.672 | 36.102 | 1501.220 |
| Sodium | Na (wt%) | 0.054 | 0.042 | 0.007 | 0.244 |
| Phosphorus | P (wt%) | 0.023 | 0.012 | 0.004 | 0.063 |
| Lead | Pb (ppm) | 20.134 | 7.676 | 7.848 | 50.115 |
| Selenium | Se (ppm) | 0.204 | 0.096 | 0.101 | 0.714 |
| Titanium | Ti (wt%) | 0.523 | 0.181 | 0.147 | 1.233 |
| Zinc | Zn (ppm) | 14.375 | 6.264 | 4.612 | 44.502 |