| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.363 | 0.508 | 3.154 | 5.655 |
| Arsenic | As (ppm) | 11.091 | 1.157 | 8.118 | 14.690 |
| Calcium | Ca (wt%) | 0.328 | 0.095 | 0.186 | 0.802 |
| Copper | Cu (ppm) | 15.944 | 5.902 | 9.127 | 42.925 |
| Iron | Fe (wt%) | 2.646 | 0.332 | 1.924 | 3.515 |
| Mercury | Hg (ppm) | 0.032 | 0.005 | 0.021 | 0.045 |
| Magnesium | Mg (wt%) | 0.361 | 0.069 | 0.211 | 0.558 |
| Manganese | Mn (ppm) | 777.529 | 167.927 | 312.281 | 1118.200 |
| Sodium | Na (wt%) | 0.492 | 0.073 | 0.335 | 0.660 |
| Phosphorus | P (wt%) | 0.048 | 0.006 | 0.023 | 0.062 |
| Lead | Pb (ppm) | 20.634 | 3.548 | 15.015 | 32.384 |
| Selenium | Se (ppm) | 0.213 | 0.054 | 0.107 | 0.309 |
| Titanium | Ti (wt%) | 0.337 | 0.027 | 0.261 | 0.405 |
| Zinc | Zn (ppm) | 90.189 | 10.069 | 66.588 | 112.713 |