| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.420 | 0.551 | 0.404 | 3.097 |
| Arsenic | As (ppm) | 4.529 | 2.608 | 1.063 | 11.893 |
| Calcium | Ca (wt%) | 0.290 | 0.152 | 0.066 | 0.923 |
| Copper | Cu (ppm) | 7.694 | 2.546 | 2.471 | 12.317 |
| Iron | Fe (wt%) | 1.054 | 0.555 | 0.253 | 2.742 |
| Mercury | Hg (ppm) | 0.025 | 0.008 | 0.010 | 0.048 |
| Magnesium | Mg (wt%) | 0.133 | 0.058 | 0.059 | 0.375 |
| Manganese | Mn (ppm) | 613.754 | 591.040 | 94.468 | 3039.990 |
| Sodium | Na (wt%) | 0.046 | 0.026 | 0.016 | 0.181 |
| Phosphorus | P (wt%) | 0.026 | 0.023 | 0.005 | 0.108 |
| Lead | Pb (ppm) | 15.537 | 8.047 | 2.968 | 38.649 |
| Selenium | Se (ppm) | 0.174 | 0.053 | 0.100 | 0.385 |
| Titanium | Ti (wt%) | 0.105 | 0.049 | 0.025 | 0.291 |
| Zinc | Zn (ppm) | 30.969 | 14.830 | 8.632 | 75.976 |