| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.517 | 1.924 | 0.563 | 7.216 |
| Arsenic | As (ppm) | 7.000 | 3.386 | 1.659 | 14.757 |
| Calcium | Ca (wt%) | 0.322 | 0.159 | 0.053 | 0.729 |
| Copper | Cu (ppm) | 8.198 | 4.264 | 1.441 | 17.149 |
| Iron | Fe (wt%) | 1.498 | 0.696 | 0.393 | 3.603 |
| Mercury | Hg (ppm) | 0.020 | 0.011 | 0.010 | 0.049 |
| Magnesium | Mg (wt%) | 0.290 | 0.191 | 0.034 | 0.682 |
| Manganese | Mn (ppm) | 418.565 | 141.461 | 162.522 | 901.468 |
| Sodium | Na (wt%) | 0.474 | 0.230 | 0.071 | 0.909 |
| Phosphorus | P (wt%) | 0.040 | 0.019 | 0.010 | 0.087 |
| Lead | Pb (ppm) | 13.255 | 4.957 | 2.866 | 26.373 |
| Selenium | Se (ppm) | 0.338 | 0.214 | 0.101 | 1.081 |
| Titanium | Ti (wt%) | 0.272 | 0.077 | 0.102 | 0.617 |
| Zinc | Zn (ppm) | 41.391 | 24.300 | 7.403 | 103.953 |