| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.053 | 0.703 | 3.468 | 6.486 |
| Arsenic | As (ppm) | 5.396 | 0.965 | 3.412 | 9.432 |
| Calcium | Ca (wt%) | 2.752 | 1.739 | 1.581 | 11.980 |
| Copper | Cu (ppm) | 14.926 | 2.142 | 8.242 | 18.506 |
| Iron | Fe (wt%) | 2.238 | 0.507 | 1.528 | 3.431 |
| Mercury | Hg (ppm) | 0.032 | 0.018 | 0.010 | 0.060 |
| Magnesium | Mg (wt%) | 1.145 | 0.685 | 0.769 | 5.215 |
| Manganese | Mn (ppm) | 463.873 | 89.793 | 255.821 | 617.369 |
| Sodium | Na (wt%) | 0.895 | 0.173 | 0.307 | 1.198 |
| Phosphorus | P (wt%) | 0.094 | 0.012 | 0.071 | 0.121 |
| Lead | Pb (ppm) | 34.886 | 8.573 | 18.882 | 45.000 |
| Selenium | Se (ppm) | 0.184 | 0.134 | 0.100 | 1.312 |
| Titanium | Ti (wt%) | 0.264 | 0.057 | 0.140 | 0.377 |
| Zinc | Zn (ppm) | 96.195 | 19.328 | 51.650 | 123.000 |