| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.763 | 1.071 | 2.349 | 7.047 |
| Arsenic | As (ppm) | 7.619 | 3.732 | 2.620 | 37.846 |
| Calcium | Ca (wt%) | 5.370 | 1.225 | 2.342 | 8.567 |
| Copper | Cu (ppm) | 17.343 | 3.556 | 10.161 | 26.592 |
| Iron | Fe (wt%) | 2.287 | 0.899 | 0.992 | 6.213 |
| Mercury | Hg (ppm) | 0.019 | 0.010 | 0.010 | 0.050 |
| Magnesium | Mg (wt%) | 1.257 | 0.337 | 0.553 | 2.331 |
| Manganese | Mn (ppm) | 511.349 | 255.072 | 213.022 | 2158.860 |
| Sodium | Na (wt%) | 0.672 | 0.527 | 0.081 | 1.913 |
| Phosphorus | P (wt%) | 0.105 | 0.023 | 0.042 | 0.166 |
| Lead | Pb (ppm) | 19.614 | 3.133 | 10.504 | 28.501 |
| Selenium | Se (ppm) | 0.373 | 0.286 | 0.101 | 2.537 |
| Titanium | Ti (wt%) | 0.293 | 0.140 | 0.124 | 0.913 |
| Zinc | Zn (ppm) | 58.667 | 13.928 | 28.729 | 99.791 |