| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.336 | 0.686 | 1.182 | 5.584 |
| Arsenic | As (ppm) | 6.662 | 1.817 | 3.043 | 13.511 |
| Calcium | Ca (wt%) | 6.748 | 6.919 | 0.247 | 21.805 |
| Copper | Cu (ppm) | 12.920 | 4.154 | 5.314 | 22.949 |
| Iron | Fe (wt%) | 2.002 | 0.361 | 0.766 | 3.670 |
| Mercury | Hg (ppm) | 0.012 | 0.002 | 0.010 | 0.029 |
| Magnesium | Mg (wt%) | 0.314 | 0.091 | 0.067 | 0.513 |
| Manganese | Mn (ppm) | 642.608 | 253.849 | 163.362 | 1600.620 |
| Sodium | Na (wt%) | 0.182 | 0.068 | 0.075 | 0.476 |
| Phosphorus | P (wt%) | 0.048 | 0.015 | 0.012 | 0.084 |
| Lead | Pb (ppm) | 16.620 | 4.168 | 3.564 | 42.202 |
| Selenium | Se (ppm) | 0.282 | 0.099 | 0.105 | 0.570 |
| Titanium | Ti (wt%) | 0.283 | 0.053 | 0.157 | 0.459 |
| Zinc | Zn (ppm) | 44.856 | 11.267 | 17.928 | 66.164 |