| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.373 | 0.610 | 1.921 | 4.915 |
| Arsenic | As (ppm) | 2.375 | 0.644 | 0.896 | 4.020 |
| Calcium | Ca (wt%) | 0.135 | 0.053 | 0.050 | 0.271 |
| Copper | Cu (ppm) | 8.847 | 1.757 | 4.036 | 11.395 |
| Iron | Fe (wt%) | 2.268 | 0.435 | 1.456 | 3.534 |
| Mercury | Hg (ppm) | 0.042 | 0.007 | 0.021 | 0.060 |
| Magnesium | Mg (wt%) | 0.110 | 0.033 | 0.043 | 0.183 |
| Manganese | Mn (ppm) | 825.220 | 201.112 | 372.034 | 1540.700 |
| Sodium | Na (wt%) | 0.154 | 0.058 | 0.060 | 0.308 |
| Phosphorus | P (wt%) | 0.042 | 0.008 | 0.026 | 0.061 |
| Lead | Pb (ppm) | 24.866 | 5.671 | 17.938 | 45.713 |
| Selenium | Se (ppm) | 0.196 | 0.047 | 0.101 | 0.296 |
| Titanium | Ti (wt%) | 0.616 | 0.074 | 0.297 | 0.808 |
| Zinc | Zn (ppm) | 35.299 | 5.757 | 21.827 | 49.202 |