| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.751 | 0.667 | 0.119 | 4.482 |
| Arsenic | As (ppm) | 1.427 | 0.524 | 0.734 | 3.331 |
| Calcium | Ca (wt%) | 0.011 | 0.007 | 0.003 | 0.042 |
| Copper | Cu (ppm) | 2.081 | 1.098 | 1.032 | 6.896 |
| Iron | Fe (wt%) | 0.211 | 0.081 | 0.054 | 0.472 |
| Mercury | Hg (ppm) | 0.016 | 0.014 | 0.010 | 0.098 |
| Magnesium | Mg (wt%) | 0.014 | 0.013 | 0.003 | 0.087 |
| Manganese | Mn (ppm) | 22.877 | 11.506 | 8.660 | 71.857 |
| Sodium | Na (wt%) | 0.005 | 0.003 | 0.003 | 0.019 |
| Phosphorus | P (wt%) | 0.009 | 0.004 | 0.004 | 0.027 |
| Lead | Pb (ppm) | 10.822 | 4.579 | 3.161 | 29.678 |
| Selenium | Se (ppm) | 0.177 | 0.105 | 0.104 | 0.786 |
| Titanium | Ti (wt%) | 0.280 | 0.076 | 0.092 | 0.492 |
| Zinc | Zn (ppm) | 13.009 | 12.861 | 1.682 | 65.190 |