| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.572 | 0.516 | 2.226 | 5.439 |
| Arsenic | As (ppm) | 5.278 | 1.876 | 1.831 | 11.383 |
| Calcium | Ca (wt%) | 4.182 | 2.608 | 0.357 | 12.266 |
| Copper | Cu (ppm) | 14.706 | 2.717 | 9.402 | 22.435 |
| Iron | Fe (wt%) | 1.503 | 0.233 | 0.879 | 2.340 |
| Mercury | Hg (ppm) | 0.017 | 0.004 | 0.009 | 0.032 |
| Magnesium | Mg (wt%) | 0.946 | 0.450 | 0.241 | 2.430 |
| Manganese | Mn (ppm) | 390.463 | 59.584 | 196.253 | 612.938 |
| Sodium | Na (wt%) | 0.325 | 0.101 | 0.087 | 0.582 |
| Phosphorus | P (wt%) | 0.104 | 0.018 | 0.060 | 0.142 |
| Lead | Pb (ppm) | 12.825 | 2.578 | 7.053 | 18.684 |
| Selenium | Se (ppm) | 0.292 | 0.188 | 0.100 | 1.064 |
| Titanium | Ti (wt%) | 0.178 | 0.023 | 0.116 | 0.268 |
| Zinc | Zn (ppm) | 58.441 | 9.818 | 33.338 | 82.471 |