| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.049 | 0.771 | 0.749 | 4.607 |
| Arsenic | As (ppm) | 3.917 | 1.429 | 2.114 | 10.604 |
| Calcium | Ca (wt%) | 0.145 | 0.077 | 0.043 | 0.427 |
| Copper | Cu (ppm) | 4.699 | 1.061 | 2.296 | 7.488 |
| Iron | Fe (wt%) | 1.188 | 0.516 | 0.495 | 3.164 |
| Mercury | Hg (ppm) | 0.015 | 0.004 | 0.010 | 0.029 |
| Magnesium | Mg (wt%) | 0.128 | 0.062 | 0.039 | 0.349 |
| Manganese | Mn (ppm) | 457.432 | 204.469 | 160.400 | 1392.760 |
| Sodium | Na (wt%) | 0.106 | 0.035 | 0.033 | 0.198 |
| Phosphorus | P (wt%) | 0.027 | 0.009 | 0.009 | 0.066 |
| Lead | Pb (ppm) | 19.394 | 4.181 | 10.567 | 41.517 |
| Selenium | Se (ppm) | 0.277 | 0.147 | 0.102 | 0.893 |
| Titanium | Ti (wt%) | 0.398 | 0.064 | 0.192 | 0.585 |
| Zinc | Zn (ppm) | 27.582 | 8.139 | 11.782 | 54.855 |