| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.575 | 0.318 | 0.063 | 2.407 |
| Arsenic | As (ppm) | 1.026 | 0.391 | 0.320 | 2.707 |
| Calcium | Ca (wt%) | 0.169 | 0.154 | 0.017 | 1.404 |
| Copper | Cu (ppm) | 2.305 | 1.317 | 1.030 | 8.774 |
| Iron | Fe (wt%) | 0.204 | 0.151 | 0.012 | 0.757 |
| Mercury | Hg (ppm) | 0.027 | 0.024 | 0.010 | 0.148 |
| Magnesium | Mg (wt%) | 0.016 | 0.006 | 0.003 | 0.040 |
| Manganese | Mn (ppm) | 45.472 | 52.293 | 7.312 | 276.407 |
| Sodium | Na (wt%) | 0.004 | 0.001 | 0.003 | 0.009 |
| Phosphorus | P (wt%) | 0.022 | 0.016 | 0.003 | 0.093 |
| Lead | Pb (ppm) | 13.505 | 7.046 | 5.143 | 37.529 |
| Selenium | Se (ppm) | 0.246 | 0.213 | 0.103 | 1.275 |
| Titanium | Ti (wt%) | 0.338 | 0.132 | 0.193 | 0.931 |
| Zinc | Zn (ppm) | 10.957 | 6.190 | 1.844 | 37.720 |