| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.159 | 0.426 | 3.106 | 5.253 |
| Arsenic | As (ppm) | 12.874 | 2.832 | 6.372 | 19.115 |
| Calcium | Ca (wt%) | 0.447 | 0.107 | 0.265 | 0.904 |
| Copper | Cu (ppm) | 10.899 | 2.866 | 3.364 | 17.239 |
| Iron | Fe (wt%) | 2.885 | 0.411 | 2.016 | 3.648 |
| Mercury | Hg (ppm) | 0.025 | 0.008 | 0.010 | 0.056 |
| Magnesium | Mg (wt%) | 0.379 | 0.050 | 0.275 | 0.535 |
| Manganese | Mn (ppm) | 515.239 | 65.966 | 353.293 | 667.399 |
| Sodium | Na (wt%) | 0.483 | 0.077 | 0.331 | 0.675 |
| Phosphorus | P (wt%) | 0.043 | 0.003 | 0.031 | 0.049 |
| Lead | Pb (ppm) | 19.093 | 1.849 | 14.834 | 22.834 |
| Selenium | Se (ppm) | 0.278 | 0.036 | 0.112 | 0.374 |
| Titanium | Ti (wt%) | 0.353 | 0.046 | 0.255 | 0.476 |
| Zinc | Zn (ppm) | 67.082 | 7.008 | 45.735 | 79.052 |