| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.144 | 0.502 | 2.584 | 6.400 |
| Arsenic | As (ppm) | 6.493 | 0.760 | 4.180 | 8.593 |
| Calcium | Ca (wt%) | 5.786 | 2.513 | 0.374 | 11.868 |
| Copper | Cu (ppm) | 15.550 | 2.943 | 9.235 | 23.973 |
| Iron | Fe (wt%) | 2.036 | 0.374 | 1.144 | 3.315 |
| Mercury | Hg (ppm) | 0.020 | 0.009 | 0.010 | 0.074 |
| Magnesium | Mg (wt%) | 0.601 | 0.256 | 0.251 | 2.194 |
| Manganese | Mn (ppm) | 493.409 | 153.129 | 254.336 | 950.858 |
| Sodium | Na (wt%) | 0.204 | 0.039 | 0.143 | 0.384 |
| Phosphorus | P (wt%) | 0.039 | 0.007 | 0.021 | 0.058 |
| Lead | Pb (ppm) | 15.206 | 1.886 | 8.293 | 20.226 |
| Selenium | Se (ppm) | 0.228 | 0.043 | 0.111 | 0.352 |
| Titanium | Ti (wt%) | 0.203 | 0.018 | 0.149 | 0.266 |
| Zinc | Zn (ppm) | 62.683 | 12.567 | 31.040 | 96.903 |