| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.224 | 0.133 | 0.039 | 0.964 |
| Arsenic | As (ppm) | 1.114 | 0.351 | 0.385 | 2.763 |
| Calcium | Ca (wt%) | 0.644 | 1.171 | 0.031 | 8.491 |
| Copper | Cu (ppm) | 2.108 | 1.075 | 1.003 | 7.285 |
| Iron | Fe (wt%) | 0.148 | 0.067 | 0.012 | 0.387 |
| Mercury | Hg (ppm) | 0.010 | 0.001 | 0.010 | 0.022 |
| Magnesium | Mg (wt%) | 0.037 | 0.048 | 0.004 | 0.376 |
| Manganese | Mn (ppm) | 22.579 | 11.316 | 7.275 | 81.246 |
| Sodium | Na (wt%) | 0.043 | 0.065 | 0.003 | 0.443 |
| Phosphorus | P (wt%) | 0.033 | 0.033 | 0.004 | 0.224 |
| Lead | Pb (ppm) | 6.485 | 2.224 | 2.207 | 12.150 |
| Selenium | Se (ppm) | 0.139 | 0.057 | 0.100 | 0.630 |
| Titanium | Ti (wt%) | 0.226 | 0.097 | 0.063 | 0.512 |
| Zinc | Zn (ppm) | 6.815 | 4.152 | 1.641 | 33.033 |