| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.996 | 0.419 | 3.918 | 6.126 |
| Arsenic | As (ppm) | 5.220 | 0.515 | 4.116 | 7.490 |
| Calcium | Ca (wt%) | 3.197 | 1.671 | 0.909 | 8.739 |
| Copper | Cu (ppm) | 15.221 | 1.888 | 10.790 | 18.657 |
| Iron | Fe (wt%) | 2.171 | 0.191 | 1.718 | 2.698 |
| Mercury | Hg (ppm) | 0.013 | 0.003 | 0.010 | 0.024 |
| Magnesium | Mg (wt%) | 0.980 | 0.254 | 0.691 | 1.901 |
| Manganese | Mn (ppm) | 489.893 | 138.745 | 307.433 | 955.816 |
| Sodium | Na (wt%) | 0.520 | 0.034 | 0.397 | 0.575 |
| Phosphorus | P (wt%) | 0.037 | 0.007 | 0.024 | 0.060 |
| Lead | Pb (ppm) | 21.065 | 2.675 | 16.515 | 29.512 |
| Selenium | Se (ppm) | 0.419 | 0.289 | 0.100 | 1.333 |
| Titanium | Ti (wt%) | 0.252 | 0.013 | 0.223 | 0.291 |
| Zinc | Zn (ppm) | 47.975 | 3.926 | 38.604 | 56.493 |