| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.560 | 0.532 | 2.985 | 5.595 |
| Arsenic | As (ppm) | 6.003 | 0.762 | 3.176 | 8.130 |
| Calcium | Ca (wt%) | 1.206 | 0.331 | 0.604 | 2.262 |
| Copper | Cu (ppm) | 21.415 | 5.553 | 6.921 | 33.567 |
| Iron | Fe (wt%) | 2.252 | 0.230 | 1.538 | 2.768 |
| Mercury | Hg (ppm) | 0.023 | 0.007 | 0.010 | 0.048 |
| Magnesium | Mg (wt%) | 0.407 | 0.060 | 0.274 | 0.551 |
| Manganese | Mn (ppm) | 489.784 | 76.505 | 243.173 | 824.687 |
| Sodium | Na (wt%) | 0.319 | 0.057 | 0.219 | 0.582 |
| Phosphorus | P (wt%) | 0.038 | 0.009 | 0.020 | 0.067 |
| Lead | Pb (ppm) | 20.288 | 3.100 | 12.855 | 28.308 |
| Selenium | Se (ppm) | 0.277 | 0.103 | 0.100 | 0.619 |
| Titanium | Ti (wt%) | 0.254 | 0.021 | 0.157 | 0.296 |
| Zinc | Zn (ppm) | 73.424 | 12.827 | 37.026 | 97.226 |