| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.870 | 0.483 | 1.032 | 4.512 |
| Arsenic | As (ppm) | 3.752 | 1.265 | 1.358 | 9.488 |
| Calcium | Ca (wt%) | 0.091 | 0.033 | 0.042 | 0.219 |
| Copper | Cu (ppm) | 4.076 | 0.777 | 2.646 | 6.626 |
| Iron | Fe (wt%) | 1.046 | 0.320 | 0.400 | 2.166 |
| Mercury | Hg (ppm) | 0.016 | 0.006 | 0.010 | 0.038 |
| Magnesium | Mg (wt%) | 0.086 | 0.032 | 0.036 | 0.251 |
| Manganese | Mn (ppm) | 117.517 | 28.844 | 64.623 | 203.347 |
| Sodium | Na (wt%) | 0.238 | 0.089 | 0.107 | 0.673 |
| Phosphorus | P (wt%) | 0.010 | 0.003 | 0.005 | 0.021 |
| Lead | Pb (ppm) | 7.104 | 1.851 | 2.073 | 13.279 |
| Selenium | Se (ppm) | 0.196 | 0.058 | 0.100 | 0.394 |
| Titanium | Ti (wt%) | 0.256 | 0.028 | 0.199 | 0.357 |
| Zinc | Zn (ppm) | 19.589 | 5.279 | 9.696 | 37.432 |