| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.963 | 0.270 | 0.510 | 2.155 |
| Arsenic | As (ppm) | 2.709 | 0.571 | 1.807 | 4.868 |
| Calcium | Ca (wt%) | 0.072 | 0.075 | 0.017 | 0.404 |
| Copper | Cu (ppm) | 2.735 | 0.840 | 1.218 | 5.705 |
| Iron | Fe (wt%) | 1.450 | 0.432 | 0.756 | 3.402 |
| Mercury | Hg (ppm) | 0.012 | 0.002 | 0.010 | 0.020 |
| Magnesium | Mg (wt%) | 0.047 | 0.019 | 0.026 | 0.113 |
| Manganese | Mn (ppm) | 413.520 | 101.863 | 211.946 | 775.123 |
| Sodium | Na (wt%) | 0.034 | 0.016 | 0.011 | 0.092 |
| Phosphorus | P (wt%) | 0.009 | 0.004 | 0.003 | 0.026 |
| Lead | Pb (ppm) | 24.105 | 5.040 | 15.474 | 50.206 |
| Selenium | Se (ppm) | 0.115 | 0.021 | 0.100 | 0.193 |
| Titanium | Ti (wt%) | 0.509 | 0.102 | 0.341 | 1.012 |
| Zinc | Zn (ppm) | 21.805 | 4.622 | 14.661 | 49.700 |