| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.353 | 0.396 | 0.627 | 2.190 |
| Arsenic | As (ppm) | 5.363 | 2.580 | 1.298 | 13.339 |
| Calcium | Ca (wt%) | 0.369 | 0.397 | 0.035 | 1.781 |
| Copper | Cu (ppm) | 7.976 | 7.127 | 1.174 | 41.112 |
| Iron | Fe (wt%) | 1.776 | 0.654 | 0.557 | 3.017 |
| Mercury | Hg (ppm) | 0.013 | 0.006 | 0.005 | 0.036 |
| Magnesium | Mg (wt%) | 0.093 | 0.039 | 0.034 | 0.187 |
| Manganese | Mn (ppm) | 992.090 | 733.565 | 360.594 | 4313.710 |
| Sodium | Na (wt%) | 0.070 | 0.026 | 0.033 | 0.148 |
| Phosphorus | P (wt%) | 0.029 | 0.014 | 0.014 | 0.073 |
| Lead | Pb (ppm) | 12.399 | 2.113 | 7.148 | 17.903 |
| Selenium | Se (ppm) | 0.211 | 0.096 | 0.100 | 0.494 |
| Titanium | Ti (wt%) | 0.535 | 0.184 | 0.173 | 1.079 |
| Zinc | Zn (ppm) | 29.651 | 11.001 | 12.195 | 65.516 |