| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.877 | 0.513 | 3.976 | 6.434 |
| Arsenic | As (ppm) | 5.132 | 0.532 | 3.793 | 7.240 |
| Calcium | Ca (wt%) | 1.444 | 0.445 | 0.822 | 2.665 |
| Copper | Cu (ppm) | 13.744 | 2.988 | 7.303 | 19.739 |
| Iron | Fe (wt%) | 2.051 | 0.285 | 1.448 | 2.941 |
| Mercury | Hg (ppm) | 0.013 | 0.003 | 0.010 | 0.024 |
| Magnesium | Mg (wt%) | 0.925 | 0.241 | 0.507 | 1.629 |
| Manganese | Mn (ppm) | 452.608 | 97.395 | 260.814 | 781.857 |
| Sodium | Na (wt%) | 0.653 | 0.071 | 0.473 | 0.799 |
| Phosphorus | P (wt%) | 0.043 | 0.009 | 0.030 | 0.089 |
| Lead | Pb (ppm) | 19.463 | 2.713 | 13.290 | 28.768 |
| Selenium | Se (ppm) | 0.324 | 0.129 | 0.109 | 0.695 |
| Titanium | Ti (wt%) | 0.279 | 0.017 | 0.231 | 0.324 |
| Zinc | Zn (ppm) | 43.105 | 6.850 | 31.272 | 63.497 |