| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.551 | 0.561 | 1.253 | 4.031 |
| Arsenic | As (ppm) | 2.405 | 1.201 | 1.050 | 5.676 |
| Calcium | Ca (wt%) | 0.264 | 0.266 | 0.049 | 1.309 |
| Copper | Cu (ppm) | 9.468 | 2.088 | 5.924 | 14.477 |
| Iron | Fe (wt%) | 2.455 | 0.313 | 1.631 | 3.492 |
| Mercury | Hg (ppm) | 0.042 | 0.011 | 0.026 | 0.074 |
| Magnesium | Mg (wt%) | 0.254 | 0.133 | 0.071 | 0.852 |
| Manganese | Mn (ppm) | 511.497 | 62.483 | 337.808 | 705.097 |
| Sodium | Na (wt%) | 0.252 | 0.088 | 0.065 | 0.581 |
| Phosphorus | P (wt%) | 0.011 | 0.005 | 0.004 | 0.026 |
| Lead | Pb (ppm) | 18.536 | 4.845 | 8.338 | 32.172 |
| Selenium | Se (ppm) | 0.134 | 0.043 | 0.100 | 0.279 |
| Titanium | Ti (wt%) | 0.605 | 0.132 | 0.396 | 1.126 |
| Zinc | Zn (ppm) | 42.050 | 5.248 | 25.709 | 55.701 |