| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.370 | 0.277 | 0.061 | 1.489 |
| Arsenic | As (ppm) | 2.066 | 2.011 | 0.304 | 13.814 |
| Calcium | Ca (wt%) | 1.976 | 2.474 | 0.035 | 11.985 |
| Copper | Cu (ppm) | 5.645 | 7.120 | 1.013 | 57.170 |
| Iron | Fe (wt%) | 0.190 | 0.150 | 0.003 | 0.848 |
| Mercury | Hg (ppm) | 0.016 | 0.007 | 0.010 | 0.042 |
| Magnesium | Mg (wt%) | 0.045 | 0.051 | 0.003 | 0.346 |
| Manganese | Mn (ppm) | 28.226 | 15.696 | 3.973 | 96.279 |
| Sodium | Na (wt%) | 0.024 | 0.017 | 0.005 | 0.085 |
| Phosphorus | P (wt%) | 0.028 | 0.024 | 0.003 | 0.131 |
| Lead | Pb (ppm) | 8.389 | 5.273 | 2.006 | 28.432 |
| Selenium | Se (ppm) | 0.264 | 0.144 | 0.101 | 0.840 |
| Titanium | Ti (wt%) | 0.189 | 0.078 | 0.070 | 0.398 |
| Zinc | Zn (ppm) | 9.198 | 6.714 | 1.044 | 39.708 |