| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.885 | 0.522 | 0.444 | 3.364 |
| Arsenic | As (ppm) | 2.719 | 0.578 | 0.784 | 4.172 |
| Calcium | Ca (wt%) | 0.074 | 0.041 | 0.009 | 0.329 |
| Copper | Cu (ppm) | 5.889 | 1.408 | 1.192 | 9.032 |
| Iron | Fe (wt%) | 0.734 | 0.164 | 0.192 | 1.115 |
| Mercury | Hg (ppm) | 0.029 | 0.007 | 0.010 | 0.045 |
| Magnesium | Mg (wt%) | 0.037 | 0.008 | 0.010 | 0.055 |
| Manganese | Mn (ppm) | 371.200 | 180.258 | 97.202 | 1044.670 |
| Sodium | Na (wt%) | 0.007 | 0.001 | 0.003 | 0.010 |
| Phosphorus | P (wt%) | 0.024 | 0.008 | 0.003 | 0.045 |
| Lead | Pb (ppm) | 17.552 | 2.548 | 8.031 | 23.355 |
| Selenium | Se (ppm) | 0.255 | 0.053 | 0.100 | 0.369 |
| Titanium | Ti (wt%) | 0.374 | 0.045 | 0.277 | 0.458 |
| Zinc | Zn (ppm) | 19.345 | 4.556 | 6.508 | 30.241 |