| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.383 | 0.228 | 0.023 | 1.410 |
| Arsenic | As (ppm) | 0.886 | 0.251 | 0.304 | 2.088 |
| Calcium | Ca (wt%) | 0.084 | 0.043 | 0.014 | 0.395 |
| Copper | Cu (ppm) | 3.604 | 2.326 | 1.004 | 12.989 |
| Iron | Fe (wt%) | 0.112 | 0.068 | 0.007 | 0.435 |
| Mercury | Hg (ppm) | 0.011 | 0.002 | 0.010 | 0.018 |
| Magnesium | Mg (wt%) | 0.016 | 0.011 | 0.003 | 0.073 |
| Manganese | Mn (ppm) | 22.119 | 9.527 | 5.147 | 55.803 |
| Sodium | Na (wt%) | 0.003 | 0.000 | 0.003 | 0.005 |
| Phosphorus | P (wt%) | 0.023 | 0.014 | 0.003 | 0.065 |
| Lead | Pb (ppm) | 7.153 | 1.722 | 2.041 | 12.097 |
| Selenium | Se (ppm) | 0.124 | 0.034 | 0.100 | 0.461 |
| Titanium | Ti (wt%) | 0.183 | 0.065 | 0.035 | 0.354 |
| Zinc | Zn (ppm) | 10.556 | 9.049 | 2.024 | 67.542 |