| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.138 | 1.134 | 2.220 | 9.748 |
| Arsenic | As (ppm) | 1.476 | 0.830 | 0.612 | 6.389 |
| Calcium | Ca (wt%) | 0.453 | 0.187 | 0.136 | 0.977 |
| Copper | Cu (ppm) | 8.250 | 3.572 | 3.359 | 27.188 |
| Iron | Fe (wt%) | 3.435 | 0.906 | 0.809 | 5.925 |
| Mercury | Hg (ppm) | 0.040 | 0.020 | 0.010 | 0.155 |
| Magnesium | Mg (wt%) | 0.219 | 0.083 | 0.027 | 0.416 |
| Manganese | Mn (ppm) | 1208.340 | 434.795 | 460.020 | 2555.690 |
| Sodium | Na (wt%) | 0.367 | 0.167 | 0.102 | 0.836 |
| Phosphorus | P (wt%) | 0.022 | 0.009 | 0.004 | 0.058 |
| Lead | Pb (ppm) | 24.043 | 7.057 | 11.609 | 53.698 |
| Selenium | Se (ppm) | 0.186 | 0.086 | 0.100 | 0.678 |
| Titanium | Ti (wt%) | 0.724 | 0.123 | 0.393 | 1.146 |
| Zinc | Zn (ppm) | 42.396 | 9.627 | 11.540 | 91.488 |