| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.507 | 0.216 | 0.044 | 0.999 |
| Arsenic | As (ppm) | 0.900 | 0.301 | 0.306 | 1.675 |
| Calcium | Ca (wt%) | 0.268 | 0.236 | 0.022 | 1.502 |
| Copper | Cu (ppm) | 2.369 | 2.258 | 1.001 | 16.588 |
| Iron | Fe (wt%) | 0.188 | 0.100 | 0.004 | 0.508 |
| Mercury | Hg (ppm) | 0.012 | 0.003 | 0.010 | 0.021 |
| Magnesium | Mg (wt%) | 0.017 | 0.007 | 0.003 | 0.039 |
| Manganese | Mn (ppm) | 31.416 | 15.186 | 9.248 | 73.014 |
| Sodium | Na (wt%) | 0.003 | 0.001 | 0.003 | 0.006 |
| Phosphorus | P (wt%) | 0.022 | 0.014 | 0.003 | 0.056 |
| Lead | Pb (ppm) | 6.547 | 2.873 | 2.042 | 14.627 |
| Selenium | Se (ppm) | 0.109 | 0.011 | 0.100 | 0.146 |
| Titanium | Ti (wt%) | 0.186 | 0.077 | 0.061 | 0.345 |
| Zinc | Zn (ppm) | 7.167 | 3.493 | 1.045 | 19.624 |