| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.267 | 0.772 | 1.083 | 5.554 |
| Arsenic | As (ppm) | 6.399 | 1.716 | 3.716 | 11.789 |
| Calcium | Ca (wt%) | 0.257 | 0.183 | 0.072 | 0.830 |
| Copper | Cu (ppm) | 9.490 | 3.148 | 4.387 | 17.840 |
| Iron | Fe (wt%) | 2.764 | 0.724 | 1.297 | 4.762 |
| Mercury | Hg (ppm) | 0.144 | 0.039 | 0.062 | 0.223 |
| Magnesium | Mg (wt%) | 0.286 | 0.146 | 0.083 | 0.779 |
| Manganese | Mn (ppm) | 473.723 | 217.994 | 159.717 | 1075.870 |
| Sodium | Na (wt%) | 0.227 | 0.119 | 0.058 | 0.524 |
| Phosphorus | P (wt%) | 0.038 | 0.015 | 0.011 | 0.096 |
| Lead | Pb (ppm) | 57.653 | 20.337 | 27.287 | 130.252 |
| Selenium | Se (ppm) | 0.533 | 0.254 | 0.129 | 1.606 |
| Titanium | Ti (wt%) | 0.858 | 0.123 | 0.582 | 1.167 |
| Zinc | Zn (ppm) | 61.968 | 15.169 | 31.002 | 98.955 |