| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.272 | 0.474 | 2.379 | 4.397 |
| Arsenic | As (ppm) | 5.163 | 0.529 | 2.302 | 5.982 |
| Calcium | Ca (wt%) | 0.237 | 0.042 | 0.147 | 0.350 |
| Copper | Cu (ppm) | 9.228 | 1.576 | 6.003 | 13.241 |
| Iron | Fe (wt%) | 1.160 | 0.130 | 0.640 | 1.467 |
| Mercury | Hg (ppm) | 0.032 | 0.008 | 0.010 | 0.052 |
| Magnesium | Mg (wt%) | 0.159 | 0.028 | 0.101 | 0.253 |
| Manganese | Mn (ppm) | 644.748 | 119.892 | 302.870 | 878.747 |
| Sodium | Na (wt%) | 0.489 | 0.132 | 0.183 | 0.821 |
| Phosphorus | P (wt%) | 0.031 | 0.005 | 0.021 | 0.045 |
| Lead | Pb (ppm) | 16.113 | 1.532 | 12.055 | 20.880 |
| Selenium | Se (ppm) | 0.307 | 0.084 | 0.100 | 0.680 |
| Titanium | Ti (wt%) | 0.297 | 0.017 | 0.254 | 0.341 |
| Zinc | Zn (ppm) | 37.986 | 6.307 | 25.013 | 53.952 |