| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.061 | 0.561 | 0.653 | 3.317 |
| Arsenic | As (ppm) | 4.317 | 3.767 | 0.495 | 27.029 |
| Calcium | Ca (wt%) | 0.464 | 0.414 | 0.075 | 2.955 |
| Copper | Cu (ppm) | 4.335 | 1.391 | 1.000 | 7.770 |
| Iron | Fe (wt%) | 0.986 | 0.282 | 0.354 | 1.731 |
| Mercury | Hg (ppm) | 0.015 | 0.006 | 0.010 | 0.060 |
| Magnesium | Mg (wt%) | 0.161 | 0.050 | 0.061 | 0.301 |
| Manganese | Mn (ppm) | 346.626 | 105.509 | 172.003 | 633.890 |
| Sodium | Na (wt%) | 0.236 | 0.084 | 0.046 | 0.664 |
| Phosphorus | P (wt%) | 0.021 | 0.010 | 0.005 | 0.058 |
| Lead | Pb (ppm) | 11.730 | 2.874 | 5.000 | 21.858 |
| Selenium | Se (ppm) | 0.153 | 0.054 | 0.100 | 0.395 |
| Titanium | Ti (wt%) | 0.162 | 0.044 | 0.044 | 0.358 |
| Zinc | Zn (ppm) | 28.726 | 8.156 | 11.268 | 59.368 |