| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.366 | 0.679 | 0.367 | 3.849 |
| Arsenic | As (ppm) | 4.668 | 1.783 | 1.841 | 13.453 |
| Calcium | Ca (wt%) | 0.119 | 0.107 | 0.026 | 0.797 |
| Copper | Cu (ppm) | 4.108 | 1.631 | 1.374 | 11.597 |
| Iron | Fe (wt%) | 0.985 | 0.232 | 0.369 | 1.951 |
| Mercury | Hg (ppm) | 0.014 | 0.004 | 0.010 | 0.036 |
| Magnesium | Mg (wt%) | 0.086 | 0.050 | 0.019 | 0.282 |
| Manganese | Mn (ppm) | 330.169 | 84.143 | 98.577 | 677.600 |
| Sodium | Na (wt%) | 0.179 | 0.113 | 0.030 | 0.665 |
| Phosphorus | P (wt%) | 0.020 | 0.008 | 0.004 | 0.052 |
| Lead | Pb (ppm) | 18.312 | 4.794 | 9.264 | 43.022 |
| Selenium | Se (ppm) | 0.139 | 0.045 | 0.100 | 0.336 |
| Titanium | Ti (wt%) | 0.413 | 0.103 | 0.212 | 0.759 |
| Zinc | Zn (ppm) | 21.130 | 10.168 | 6.119 | 82.254 |