| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.578 | 0.317 | 0.648 | 2.429 |
| Arsenic | As (ppm) | 2.146 | 0.716 | 0.650 | 4.787 |
| Calcium | Ca (wt%) | 0.109 | 0.082 | 0.014 | 0.473 |
| Copper | Cu (ppm) | 3.758 | 1.314 | 1.253 | 8.575 |
| Iron | Fe (wt%) | 0.854 | 0.323 | 0.316 | 2.478 |
| Mercury | Hg (ppm) | 0.193 | 0.344 | 0.011 | 1.994 |
| Magnesium | Mg (wt%) | 0.060 | 0.027 | 0.011 | 0.200 |
| Manganese | Mn (ppm) | 212.507 | 114.212 | 89.416 | 830.145 |
| Sodium | Na (wt%) | 0.083 | 0.044 | 0.021 | 0.264 |
| Phosphorus | P (wt%) | 0.018 | 0.005 | 0.009 | 0.043 |
| Lead | Pb (ppm) | 16.757 | 2.736 | 8.911 | 24.986 |
| Selenium | Se (ppm) | 0.136 | 0.029 | 0.100 | 0.294 |
| Titanium | Ti (wt%) | 0.470 | 0.119 | 0.255 | 0.908 |
| Zinc | Zn (ppm) | 15.180 | 5.591 | 6.124 | 35.669 |