| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.171 | 0.275 | 2.058 | 3.912 |
| Arsenic | As (ppm) | 5.055 | 0.527 | 3.495 | 6.414 |
| Calcium | Ca (wt%) | 3.407 | 0.523 | 1.821 | 4.291 |
| Copper | Cu (ppm) | 11.540 | 1.453 | 8.155 | 13.981 |
| Iron | Fe (wt%) | 2.787 | 1.213 | 1.314 | 7.158 |
| Mercury | Hg (ppm) | 0.010 | 0.001 | 0.010 | 0.015 |
| Magnesium | Mg (wt%) | 1.659 | 0.585 | 0.504 | 2.850 |
| Manganese | Mn (ppm) | 567.562 | 185.583 | 310.992 | 1437.000 |
| Sodium | Na (wt%) | 0.553 | 0.097 | 0.385 | 0.825 |
| Phosphorus | P (wt%) | 0.041 | 0.004 | 0.029 | 0.055 |
| Lead | Pb (ppm) | 19.855 | 4.327 | 11.143 | 38.442 |
| Selenium | Se (ppm) | 0.107 | 0.009 | 0.100 | 0.150 |
| Titanium | Ti (wt%) | 0.400 | 0.166 | 0.203 | 1.014 |
| Zinc | Zn (ppm) | 30.493 | 5.325 | 21.154 | 52.057 |