| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.112 | 0.601 | 1.084 | 5.309 |
| Arsenic | As (ppm) | 4.706 | 1.455 | 2.287 | 11.895 |
| Calcium | Ca (wt%) | 0.154 | 0.121 | 0.033 | 1.064 |
| Copper | Cu (ppm) | 6.555 | 4.024 | 2.538 | 48.979 |
| Iron | Fe (wt%) | 1.271 | 0.334 | 0.694 | 2.590 |
| Mercury | Hg (ppm) | 0.028 | 0.008 | 0.011 | 0.050 |
| Magnesium | Mg (wt%) | 0.112 | 0.043 | 0.040 | 0.253 |
| Manganese | Mn (ppm) | 270.256 | 96.974 | 59.334 | 682.930 |
| Sodium | Na (wt%) | 0.055 | 0.030 | 0.014 | 0.173 |
| Phosphorus | P (wt%) | 0.016 | 0.004 | 0.008 | 0.037 |
| Lead | Pb (ppm) | 13.456 | 7.803 | 4.889 | 90.390 |
| Selenium | Se (ppm) | 0.278 | 0.098 | 0.100 | 0.593 |
| Titanium | Ti (wt%) | 0.220 | 0.034 | 0.134 | 0.367 |
| Zinc | Zn (ppm) | 28.469 | 8.154 | 10.889 | 67.656 |