| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.689 | 0.495 | 0.079 | 3.223 |
| Arsenic | As (ppm) | 4.869 | 4.528 | 0.301 | 37.372 |
| Calcium | Ca (wt%) | 6.605 | 3.925 | 0.180 | 22.417 |
| Copper | Cu (ppm) | 23.858 | 19.171 | 1.022 | 93.226 |
| Iron | Fe (wt%) | 0.560 | 0.521 | 0.050 | 3.091 |
| Mercury | Hg (ppm) | 0.055 | 0.038 | 0.010 | 0.171 |
| Magnesium | Mg (wt%) | 0.453 | 0.444 | 0.003 | 2.308 |
| Manganese | Mn (ppm) | 86.000 | 53.653 | 15.854 | 386.066 |
| Sodium | Na (wt%) | 0.053 | 0.026 | 0.009 | 0.206 |
| Phosphorus | P (wt%) | 0.080 | 0.073 | 0.003 | 0.672 |
| Lead | Pb (ppm) | 14.698 | 8.783 | 2.006 | 63.458 |
| Selenium | Se (ppm) | 0.876 | 0.684 | 0.100 | 2.789 |
| Titanium | Ti (wt%) | 0.113 | 0.060 | 0.035 | 0.492 |
| Zinc | Zn (ppm) | 43.865 | 37.395 | 1.032 | 181.423 |