| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.093 | 1.175 | 0.355 | 8.560 |
| Arsenic | As (ppm) | 3.661 | 1.702 | 1.176 | 13.014 |
| Calcium | Ca (wt%) | 1.029 | 1.207 | 0.020 | 11.598 |
| Copper | Cu (ppm) | 6.682 | 3.222 | 1.214 | 24.870 |
| Iron | Fe (wt%) | 1.435 | 0.551 | 0.399 | 3.149 |
| Mercury | Hg (ppm) | 0.779 | 1.258 | 0.035 | 7.282 |
| Magnesium | Mg (wt%) | 0.106 | 0.063 | 0.019 | 0.358 |
| Manganese | Mn (ppm) | 286.797 | 139.732 | 93.332 | 787.809 |
| Sodium | Na (wt%) | 0.060 | 0.027 | 0.007 | 0.153 |
| Phosphorus | P (wt%) | 0.024 | 0.013 | 0.003 | 0.101 |
| Lead | Pb (ppm) | 17.617 | 4.627 | 5.211 | 41.495 |
| Selenium | Se (ppm) | 0.221 | 0.104 | 0.100 | 0.765 |
| Titanium | Ti (wt%) | 0.535 | 0.110 | 0.271 | 0.979 |
| Zinc | Zn (ppm) | 29.144 | 14.006 | 9.063 | 115.307 |