| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.176 | 0.977 | 0.456 | 5.532 |
| Arsenic | As (ppm) | 4.437 | 1.228 | 1.648 | 8.792 |
| Calcium | Ca (wt%) | 0.354 | 0.307 | 0.027 | 1.669 |
| Copper | Cu (ppm) | 5.098 | 1.443 | 1.154 | 10.396 |
| Iron | Fe (wt%) | 1.125 | 0.485 | 0.297 | 2.709 |
| Mercury | Hg (ppm) | 0.027 | 0.026 | 0.010 | 0.167 |
| Magnesium | Mg (wt%) | 0.130 | 0.067 | 0.021 | 0.408 |
| Manganese | Mn (ppm) | 306.846 | 190.407 | 69.582 | 1157.700 |
| Sodium | Na (wt%) | 0.107 | 0.054 | 0.011 | 0.331 |
| Phosphorus | P (wt%) | 0.014 | 0.006 | 0.005 | 0.031 |
| Lead | Pb (ppm) | 10.549 | 3.405 | 4.081 | 24.547 |
| Selenium | Se (ppm) | 0.227 | 0.063 | 0.100 | 0.378 |
| Titanium | Ti (wt%) | 0.219 | 0.049 | 0.111 | 0.359 |
| Zinc | Zn (ppm) | 19.765 | 9.549 | 1.313 | 51.481 |