| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.377 | 0.723 | 1.578 | 5.088 |
| Arsenic | As (ppm) | 4.635 | 1.713 | 1.477 | 11.732 |
| Calcium | Ca (wt%) | 0.741 | 0.403 | 0.044 | 1.744 |
| Copper | Cu (ppm) | 10.512 | 2.432 | 5.350 | 16.774 |
| Iron | Fe (wt%) | 2.014 | 0.501 | 0.925 | 3.078 |
| Mercury | Hg (ppm) | 0.050 | 0.014 | 0.014 | 0.103 |
| Magnesium | Mg (wt%) | 0.138 | 0.058 | 0.042 | 0.266 |
| Manganese | Mn (ppm) | 632.530 | 306.224 | 135.973 | 1220.320 |
| Sodium | Na (wt%) | 0.493 | 0.241 | 0.038 | 0.918 |
| Phosphorus | P (wt%) | 0.024 | 0.011 | 0.011 | 0.060 |
| Lead | Pb (ppm) | 21.408 | 4.607 | 10.221 | 36.174 |
| Selenium | Se (ppm) | 0.232 | 0.112 | 0.105 | 0.682 |
| Titanium | Ti (wt%) | 0.485 | 0.080 | 0.236 | 0.657 |
| Zinc | Zn (ppm) | 26.218 | 5.599 | 12.871 | 43.912 |