| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.121 | 0.984 | 3.589 | 9.230 |
| Arsenic | As (ppm) | 7.439 | 1.964 | 2.964 | 12.129 |
| Calcium | Ca (wt%) | 1.327 | 0.677 | 0.413 | 4.996 |
| Copper | Cu (ppm) | 62.985 | 21.226 | 24.434 | 161.334 |
| Iron | Fe (wt%) | 4.199 | 0.567 | 2.651 | 5.864 |
| Mercury | Hg (ppm) | 0.040 | 0.018 | 0.011 | 0.098 |
| Magnesium | Mg (wt%) | 1.569 | 0.796 | 0.571 | 7.258 |
| Manganese | Mn (ppm) | 759.472 | 214.472 | 385.754 | 1682.170 |
| Sodium | Na (wt%) | 1.484 | 0.181 | 0.898 | 2.015 |
| Phosphorus | P (wt%) | 0.065 | 0.014 | 0.026 | 0.132 |
| Lead | Pb (ppm) | 12.318 | 2.316 | 5.613 | 23.814 |
| Selenium | Se (ppm) | 0.205 | 0.070 | 0.100 | 0.465 |
| Titanium | Ti (wt%) | 0.432 | 0.056 | 0.272 | 0.808 |
| Zinc | Zn (ppm) | 97.185 | 16.666 | 48.178 | 155.827 |