| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.486 | 0.243 | 0.076 | 1.498 |
| Arsenic | As (ppm) | 2.346 | 1.335 | 0.772 | 15.127 |
| Calcium | Ca (wt%) | 1.755 | 2.096 | 0.073 | 11.213 |
| Copper | Cu (ppm) | 4.815 | 4.876 | 1.006 | 29.214 |
| Iron | Fe (wt%) | 0.330 | 0.269 | 0.038 | 3.010 |
| Mercury | Hg (ppm) | 0.029 | 0.013 | 0.010 | 0.132 |
| Magnesium | Mg (wt%) | 0.072 | 0.110 | 0.006 | 0.745 |
| Manganese | Mn (ppm) | 39.799 | 23.763 | 7.464 | 217.359 |
| Sodium | Na (wt%) | 0.020 | 0.015 | 0.003 | 0.084 |
| Phosphorus | P (wt%) | 0.031 | 0.023 | 0.005 | 0.123 |
| Lead | Pb (ppm) | 10.294 | 5.746 | 2.409 | 41.027 |
| Selenium | Se (ppm) | 0.294 | 0.149 | 0.104 | 1.023 |
| Titanium | Ti (wt%) | 0.182 | 0.059 | 0.050 | 0.511 |
| Zinc | Zn (ppm) | 11.256 | 10.689 | 1.258 | 70.560 |