| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.735 | 0.415 | 3.656 | 5.637 |
| Arsenic | As (ppm) | 12.048 | 1.627 | 7.953 | 17.140 |
| Calcium | Ca (wt%) | 0.468 | 0.225 | 0.159 | 1.623 |
| Copper | Cu (ppm) | 12.191 | 3.475 | 8.037 | 24.912 |
| Iron | Fe (wt%) | 2.793 | 0.166 | 2.368 | 3.287 |
| Mercury | Hg (ppm) | 0.038 | 0.007 | 0.025 | 0.050 |
| Magnesium | Mg (wt%) | 0.404 | 0.036 | 0.285 | 0.484 |
| Manganese | Mn (ppm) | 561.917 | 38.748 | 424.623 | 681.499 |
| Sodium | Na (wt%) | 0.559 | 0.048 | 0.454 | 0.723 |
| Phosphorus | P (wt%) | 0.041 | 0.004 | 0.032 | 0.057 |
| Lead | Pb (ppm) | 28.930 | 14.187 | 15.251 | 88.298 |
| Selenium | Se (ppm) | 0.329 | 0.038 | 0.221 | 0.406 |
| Titanium | Ti (wt%) | 0.353 | 0.026 | 0.292 | 0.400 |
| Zinc | Zn (ppm) | 80.388 | 11.805 | 66.476 | 121.541 |