| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.504 | 0.766 | 2.581 | 6.465 |
| Arsenic | As (ppm) | 6.623 | 2.768 | 3.052 | 15.389 |
| Calcium | Ca (wt%) | 1.274 | 0.393 | 0.240 | 2.692 |
| Copper | Cu (ppm) | 15.250 | 4.347 | 6.204 | 27.996 |
| Iron | Fe (wt%) | 2.291 | 0.401 | 0.946 | 3.276 |
| Mercury | Hg (ppm) | 0.044 | 0.038 | 0.010 | 0.190 |
| Magnesium | Mg (wt%) | 0.576 | 0.201 | 0.170 | 1.154 |
| Manganese | Mn (ppm) | 900.566 | 761.020 | 231.166 | 3660.180 |
| Sodium | Na (wt%) | 0.484 | 0.237 | 0.238 | 1.254 |
| Phosphorus | P (wt%) | 0.041 | 0.011 | 0.015 | 0.071 |
| Lead | Pb (ppm) | 36.899 | 15.830 | 6.994 | 93.538 |
| Selenium | Se (ppm) | 0.281 | 0.136 | 0.100 | 0.700 |
| Titanium | Ti (wt%) | 0.264 | 0.020 | 0.206 | 0.314 |
| Zinc | Zn (ppm) | 58.191 | 14.940 | 21.778 | 94.945 |