| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.827 | 0.453 | 0.727 | 2.652 |
| Arsenic | As (ppm) | 3.639 | 0.697 | 2.197 | 5.297 |
| Calcium | Ca (wt%) | 0.279 | 0.163 | 0.078 | 0.903 |
| Copper | Cu (ppm) | 5.345 | 1.458 | 2.170 | 11.765 |
| Iron | Fe (wt%) | 1.103 | 0.199 | 0.561 | 1.538 |
| Mercury | Hg (ppm) | 0.011 | 0.002 | 0.010 | 0.024 |
| Magnesium | Mg (wt%) | 0.151 | 0.044 | 0.061 | 0.260 |
| Manganese | Mn (ppm) | 506.829 | 222.938 | 143.716 | 1285.290 |
| Sodium | Na (wt%) | 0.206 | 0.097 | 0.057 | 0.482 |
| Phosphorus | P (wt%) | 0.017 | 0.005 | 0.006 | 0.033 |
| Lead | Pb (ppm) | 10.632 | 2.462 | 2.706 | 15.359 |
| Selenium | Se (ppm) | 0.133 | 0.026 | 0.100 | 0.256 |
| Titanium | Ti (wt%) | 0.172 | 0.030 | 0.100 | 0.290 |
| Zinc | Zn (ppm) | 20.545 | 5.463 | 9.482 | 36.808 |