| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.503 | 0.451 | 4.789 | 7.880 |
| Arsenic | As (ppm) | 9.219 | 2.883 | 3.235 | 15.567 |
| Calcium | Ca (wt%) | 0.318 | 0.111 | 0.102 | 0.797 |
| Copper | Cu (ppm) | 15.213 | 3.106 | 9.303 | 25.445 |
| Iron | Fe (wt%) | 2.572 | 0.435 | 1.573 | 3.648 |
| Mercury | Hg (ppm) | 0.032 | 0.008 | 0.015 | 0.062 |
| Magnesium | Mg (wt%) | 0.476 | 0.087 | 0.383 | 0.898 |
| Manganese | Mn (ppm) | 342.522 | 92.677 | 97.322 | 526.230 |
| Sodium | Na (wt%) | 0.583 | 0.064 | 0.426 | 0.698 |
| Phosphorus | P (wt%) | 0.033 | 0.010 | 0.017 | 0.075 |
| Lead | Pb (ppm) | 16.793 | 2.571 | 11.403 | 28.032 |
| Selenium | Se (ppm) | 0.286 | 0.091 | 0.109 | 0.665 |
| Titanium | Ti (wt%) | 0.348 | 0.028 | 0.292 | 0.435 |
| Zinc | Zn (ppm) | 73.864 | 10.550 | 52.846 | 110.485 |