| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.440 | 0.676 | 0.333 | 3.747 |
| Arsenic | As (ppm) | 3.865 | 1.424 | 1.176 | 8.564 |
| Calcium | Ca (wt%) | 0.036 | 0.041 | 0.007 | 0.231 |
| Copper | Cu (ppm) | 4.526 | 1.473 | 1.115 | 9.502 |
| Iron | Fe (wt%) | 0.922 | 0.378 | 0.276 | 2.132 |
| Mercury | Hg (ppm) | 0.016 | 0.005 | 0.010 | 0.033 |
| Magnesium | Mg (wt%) | 0.028 | 0.011 | 0.003 | 0.064 |
| Manganese | Mn (ppm) | 140.813 | 54.282 | 45.270 | 329.419 |
| Sodium | Na (wt%) | 0.024 | 0.048 | 0.003 | 0.267 |
| Phosphorus | P (wt%) | 0.021 | 0.007 | 0.007 | 0.044 |
| Lead | Pb (ppm) | 14.285 | 4.324 | 6.199 | 27.763 |
| Selenium | Se (ppm) | 0.204 | 0.082 | 0.100 | 0.455 |
| Titanium | Ti (wt%) | 0.443 | 0.054 | 0.236 | 0.652 |
| Zinc | Zn (ppm) | 16.392 | 7.295 | 3.313 | 38.690 |