| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.695 | 0.551 | 4.113 | 6.470 |
| Arsenic | As (ppm) | 9.972 | 1.106 | 7.168 | 12.581 |
| Calcium | Ca (wt%) | 0.416 | 0.100 | 0.249 | 0.788 |
| Copper | Cu (ppm) | 12.882 | 3.768 | 8.067 | 29.360 |
| Iron | Fe (wt%) | 3.320 | 0.294 | 2.469 | 3.783 |
| Mercury | Hg (ppm) | 0.033 | 0.009 | 0.012 | 0.059 |
| Magnesium | Mg (wt%) | 0.586 | 0.056 | 0.431 | 0.690 |
| Manganese | Mn (ppm) | 673.669 | 88.376 | 403.685 | 857.789 |
| Sodium | Na (wt%) | 0.614 | 0.034 | 0.502 | 0.699 |
| Phosphorus | P (wt%) | 0.054 | 0.003 | 0.045 | 0.063 |
| Lead | Pb (ppm) | 30.339 | 3.791 | 15.335 | 34.823 |
| Selenium | Se (ppm) | 0.241 | 0.069 | 0.101 | 0.475 |
| Titanium | Ti (wt%) | 0.286 | 0.015 | 0.252 | 0.323 |
| Zinc | Zn (ppm) | 81.279 | 8.180 | 58.182 | 97.341 |