| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.618 | 0.295 | 3.823 | 5.109 |
| Arsenic | As (ppm) | 4.066 | 1.819 | 1.972 | 9.406 |
| Calcium | Ca (wt%) | 2.191 | 0.813 | 1.225 | 4.623 |
| Copper | Cu (ppm) | 9.443 | 2.555 | 3.595 | 15.898 |
| Iron | Fe (wt%) | 2.970 | 0.240 | 2.557 | 3.511 |
| Mercury | Hg (ppm) | 0.025 | 0.004 | 0.014 | 0.037 |
| Magnesium | Mg (wt%) | 0.946 | 0.195 | 0.601 | 1.366 |
| Manganese | Mn (ppm) | 714.099 | 131.068 | 492.036 | 1064.010 |
| Sodium | Na (wt%) | 1.329 | 0.065 | 1.160 | 1.437 |
| Phosphorus | P (wt%) | 0.073 | 0.003 | 0.062 | 0.080 |
| Lead | Pb (ppm) | 16.398 | 1.519 | 14.038 | 19.811 |
| Selenium | Se (ppm) | 0.143 | 0.037 | 0.101 | 0.299 |
| Titanium | Ti (wt%) | 0.568 | 0.034 | 0.506 | 0.678 |
| Zinc | Zn (ppm) | 75.856 | 7.859 | 48.640 | 93.262 |