| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.198 | 0.669 | 2.026 | 5.846 |
| Arsenic | As (ppm) | 7.226 | 1.586 | 3.799 | 12.176 |
| Calcium | Ca (wt%) | 11.552 | 5.846 | 2.232 | 25.942 |
| Copper | Cu (ppm) | 13.686 | 3.183 | 7.647 | 25.610 |
| Iron | Fe (wt%) | 1.752 | 0.359 | 1.104 | 2.883 |
| Mercury | Hg (ppm) | 0.016 | 0.004 | 0.010 | 0.035 |
| Magnesium | Mg (wt%) | 0.345 | 0.059 | 0.158 | 0.502 |
| Manganese | Mn (ppm) | 779.026 | 330.087 | 261.434 | 2022.360 |
| Sodium | Na (wt%) | 0.123 | 0.034 | 0.063 | 0.223 |
| Phosphorus | P (wt%) | 0.046 | 0.010 | 0.023 | 0.078 |
| Lead | Pb (ppm) | 42.016 | 18.402 | 15.992 | 123.558 |
| Selenium | Se (ppm) | 0.340 | 0.106 | 0.115 | 0.587 |
| Titanium | Ti (wt%) | 0.212 | 0.047 | 0.104 | 0.335 |
| Zinc | Zn (ppm) | 49.255 | 7.827 | 31.478 | 79.806 |