| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.620 | 0.244 | 0.360 | 1.615 |
| Arsenic | As (ppm) | 1.097 | 0.213 | 0.364 | 1.747 |
| Calcium | Ca (wt%) | 0.014 | 0.004 | 0.007 | 0.027 |
| Copper | Cu (ppm) | 1.453 | 0.406 | 1.000 | 3.063 |
| Iron | Fe (wt%) | 0.404 | 0.113 | 0.231 | 0.712 |
| Mercury | Hg (ppm) | 0.047 | 0.025 | 0.013 | 0.108 |
| Magnesium | Mg (wt%) | 0.012 | 0.004 | 0.007 | 0.028 |
| Manganese | Mn (ppm) | 124.977 | 45.111 | 27.425 | 198.024 |
| Sodium | Na (wt%) | 0.009 | 0.004 | 0.003 | 0.021 |
| Phosphorus | P (wt%) | 0.009 | 0.003 | 0.003 | 0.017 |
| Lead | Pb (ppm) | 14.113 | 1.932 | 10.357 | 18.651 |
| Selenium | Se (ppm) | 0.120 | 0.028 | 0.100 | 0.226 |
| Titanium | Ti (wt%) | 0.403 | 0.028 | 0.348 | 0.469 |
| Zinc | Zn (ppm) | 6.475 | 1.972 | 3.323 | 13.838 |