| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.321 | 0.736 | 5.983 | 9.666 |
| Arsenic | As (ppm) | 6.246 | 1.511 | 3.045 | 11.037 |
| Calcium | Ca (wt%) | 2.449 | 0.270 | 1.547 | 3.409 |
| Copper | Cu (ppm) | 26.854 | 9.671 | 8.648 | 85.659 |
| Iron | Fe (wt%) | 3.056 | 0.602 | 2.005 | 6.069 |
| Mercury | Hg (ppm) | 0.171 | 0.232 | 0.012 | 1.022 |
| Magnesium | Mg (wt%) | 0.821 | 0.183 | 0.313 | 1.179 |
| Manganese | Mn (ppm) | 591.368 | 77.972 | 450.997 | 899.036 |
| Sodium | Na (wt%) | 1.820 | 0.271 | 1.253 | 2.843 |
| Phosphorus | P (wt%) | 0.083 | 0.009 | 0.056 | 0.105 |
| Lead | Pb (ppm) | 38.618 | 17.169 | 15.676 | 142.206 |
| Selenium | Se (ppm) | 0.107 | 0.011 | 0.100 | 0.146 |
| Titanium | Ti (wt%) | 0.481 | 0.132 | 0.283 | 1.032 |
| Zinc | Zn (ppm) | 84.215 | 15.154 | 48.896 | 147.801 |