| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.955 | 0.722 | 2.469 | 6.935 |
| Arsenic | As (ppm) | 5.995 | 1.843 | 2.858 | 14.007 |
| Calcium | Ca (wt%) | 2.968 | 1.477 | 0.959 | 7.282 |
| Copper | Cu (ppm) | 18.076 | 4.911 | 5.204 | 41.114 |
| Iron | Fe (wt%) | 2.287 | 0.501 | 0.937 | 3.851 |
| Mercury | Hg (ppm) | 0.035 | 0.021 | 0.010 | 0.143 |
| Magnesium | Mg (wt%) | 0.893 | 0.242 | 0.435 | 1.563 |
| Manganese | Mn (ppm) | 497.784 | 86.471 | 270.091 | 724.931 |
| Sodium | Na (wt%) | 0.805 | 0.273 | 0.234 | 1.627 |
| Phosphorus | P (wt%) | 0.098 | 0.026 | 0.036 | 0.194 |
| Lead | Pb (ppm) | 26.124 | 16.087 | 9.158 | 164.063 |
| Selenium | Se (ppm) | 0.658 | 0.677 | 0.106 | 4.340 |
| Titanium | Ti (wt%) | 0.288 | 0.072 | 0.118 | 0.561 |
| Zinc | Zn (ppm) | 134.256 | 90.599 | 45.440 | 695.740 |