| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.408 | 0.795 | 2.874 | 7.316 |
| Arsenic | As (ppm) | 5.913 | 1.194 | 2.512 | 9.072 |
| Calcium | Ca (wt%) | 3.276 | 1.426 | 1.248 | 8.934 |
| Copper | Cu (ppm) | 10.689 | 3.972 | 5.441 | 22.686 |
| Iron | Fe (wt%) | 2.592 | 0.455 | 1.241 | 3.543 |
| Mercury | Hg (ppm) | 0.038 | 0.041 | 0.010 | 0.169 |
| Magnesium | Mg (wt%) | 1.906 | 0.381 | 0.663 | 2.600 |
| Manganese | Mn (ppm) | 508.523 | 140.579 | 327.211 | 884.406 |
| Sodium | Na (wt%) | 0.617 | 0.068 | 0.401 | 0.838 |
| Phosphorus | P (wt%) | 0.041 | 0.006 | 0.023 | 0.054 |
| Lead | Pb (ppm) | 17.964 | 3.177 | 12.852 | 26.921 |
| Selenium | Se (ppm) | 0.300 | 0.190 | 0.104 | 0.896 |
| Titanium | Ti (wt%) | 0.253 | 0.039 | 0.166 | 0.345 |
| Zinc | Zn (ppm) | 49.262 | 8.554 | 23.290 | 71.287 |