| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.437 | 0.858 | 4.353 | 10.789 |
| Arsenic | As (ppm) | 3.735 | 1.863 | 0.307 | 10.141 |
| Calcium | Ca (wt%) | 1.566 | 0.416 | 0.746 | 3.716 |
| Copper | Cu (ppm) | 12.897 | 6.531 | 3.021 | 68.211 |
| Iron | Fe (wt%) | 2.295 | 0.478 | 1.234 | 4.095 |
| Mercury | Hg (ppm) | 0.054 | 0.023 | 0.013 | 0.167 |
| Magnesium | Mg (wt%) | 0.731 | 0.281 | 0.315 | 2.361 |
| Manganese | Mn (ppm) | 476.018 | 158.651 | 207.880 | 1283.060 |
| Sodium | Na (wt%) | 2.099 | 0.363 | 0.548 | 3.732 |
| Phosphorus | P (wt%) | 0.070 | 0.011 | 0.036 | 0.108 |
| Lead | Pb (ppm) | 28.141 | 6.273 | 12.729 | 62.199 |
| Selenium | Se (ppm) | 0.216 | 0.089 | 0.100 | 0.733 |
| Titanium | Ti (wt%) | 0.318 | 0.089 | 0.155 | 1.028 |
| Zinc | Zn (ppm) | 60.232 | 16.812 | 16.354 | 123.452 |