| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.985 | 0.393 | 0.124 | 4.468 |
| Arsenic | As (ppm) | 2.748 | 0.885 | 0.724 | 9.377 |
| Calcium | Ca (wt%) | 0.054 | 0.042 | 0.008 | 0.498 |
| Copper | Cu (ppm) | 4.605 | 1.299 | 1.576 | 14.160 |
| Iron | Fe (wt%) | 0.509 | 0.187 | 0.105 | 1.373 |
| Mercury | Hg (ppm) | 0.038 | 0.010 | 0.011 | 0.132 |
| Magnesium | Mg (wt%) | 0.031 | 0.021 | 0.005 | 0.260 |
| Manganese | Mn (ppm) | 119.964 | 46.049 | 29.418 | 433.127 |
| Sodium | Na (wt%) | 0.012 | 0.005 | 0.004 | 0.035 |
| Phosphorus | P (wt%) | 0.032 | 0.012 | 0.006 | 0.106 |
| Lead | Pb (ppm) | 13.200 | 5.350 | 4.607 | 78.585 |
| Selenium | Se (ppm) | 0.192 | 0.070 | 0.100 | 0.637 |
| Titanium | Ti (wt%) | 0.487 | 0.097 | 0.288 | 0.947 |
| Zinc | Zn (ppm) | 19.059 | 13.594 | 5.168 | 202.544 |