| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.389 | 0.249 | 5.056 | 6.548 |
| Arsenic | As (ppm) | 6.387 | 0.243 | 5.872 | 6.875 |
| Calcium | Ca (wt%) | 1.909 | 0.622 | 0.764 | 3.347 |
| Copper | Cu (ppm) | 12.931 | 1.097 | 11.421 | 15.611 |
| Iron | Fe (wt%) | 1.955 | 0.132 | 1.773 | 2.228 |
| Mercury | Hg (ppm) | 0.018 | 0.004 | 0.010 | 0.026 |
| Magnesium | Mg (wt%) | 0.776 | 0.156 | 0.514 | 1.206 |
| Manganese | Mn (ppm) | 445.064 | 21.363 | 420.956 | 522.052 |
| Sodium | Na (wt%) | 0.734 | 0.171 | 0.541 | 1.414 |
| Phosphorus | P (wt%) | 0.056 | 0.003 | 0.044 | 0.065 |
| Lead | Pb (ppm) | 22.709 | 1.622 | 19.467 | 25.858 |
| Selenium | Se (ppm) | 0.163 | 0.022 | 0.112 | 0.199 |
| Titanium | Ti (wt%) | 0.244 | 0.015 | 0.222 | 0.301 |
| Zinc | Zn (ppm) | 53.172 | 3.791 | 47.393 | 60.607 |