| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.820 | 0.566 | 0.381 | 4.197 |
| Arsenic | As (ppm) | 2.803 | 0.573 | 1.168 | 4.544 |
| Calcium | Ca (wt%) | 0.066 | 0.024 | 0.013 | 0.158 |
| Copper | Cu (ppm) | 5.113 | 0.974 | 2.333 | 8.524 |
| Iron | Fe (wt%) | 0.658 | 0.140 | 0.190 | 1.396 |
| Mercury | Hg (ppm) | 0.027 | 0.008 | 0.010 | 0.053 |
| Magnesium | Mg (wt%) | 0.089 | 0.039 | 0.019 | 0.313 |
| Manganese | Mn (ppm) | 165.272 | 91.256 | 41.986 | 672.757 |
| Sodium | Na (wt%) | 0.108 | 0.040 | 0.013 | 0.233 |
| Phosphorus | P (wt%) | 0.013 | 0.003 | 0.005 | 0.028 |
| Lead | Pb (ppm) | 9.752 | 1.397 | 6.088 | 13.870 |
| Selenium | Se (ppm) | 0.262 | 0.081 | 0.105 | 0.566 |
| Titanium | Ti (wt%) | 0.285 | 0.033 | 0.175 | 0.367 |
| Zinc | Zn (ppm) | 20.466 | 7.938 | 8.925 | 73.155 |