| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.635 | 0.535 | 0.935 | 3.741 |
| Arsenic | As (ppm) | 2.735 | 0.616 | 1.745 | 4.507 |
| Calcium | Ca (wt%) | 0.506 | 0.148 | 0.114 | 0.807 |
| Copper | Cu (ppm) | 4.542 | 0.874 | 3.016 | 7.894 |
| Iron | Fe (wt%) | 1.130 | 0.292 | 0.559 | 1.829 |
| Mercury | Hg (ppm) | 0.011 | 0.002 | 0.010 | 0.018 |
| Magnesium | Mg (wt%) | 0.352 | 0.098 | 0.073 | 0.597 |
| Manganese | Mn (ppm) | 262.093 | 75.820 | 98.174 | 521.521 |
| Sodium | Na (wt%) | 0.473 | 0.148 | 0.108 | 0.891 |
| Phosphorus | P (wt%) | 0.018 | 0.005 | 0.003 | 0.030 |
| Lead | Pb (ppm) | 11.458 | 2.597 | 6.362 | 20.894 |
| Selenium | Se (ppm) | 0.150 | 0.049 | 0.100 | 0.384 |
| Titanium | Ti (wt%) | 0.198 | 0.036 | 0.127 | 0.268 |
| Zinc | Zn (ppm) | 18.758 | 4.136 | 9.783 | 30.665 |