| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.540 | 0.213 | 4.979 | 6.188 |
| Arsenic | As (ppm) | 5.851 | 1.376 | 4.023 | 11.078 |
| Calcium | Ca (wt%) | 1.233 | 0.090 | 1.004 | 1.706 |
| Copper | Cu (ppm) | 15.583 | 1.769 | 11.473 | 20.937 |
| Iron | Fe (wt%) | 2.473 | 0.174 | 2.020 | 3.141 |
| Mercury | Hg (ppm) | 0.017 | 0.007 | 0.010 | 0.039 |
| Magnesium | Mg (wt%) | 0.699 | 0.053 | 0.493 | 0.897 |
| Manganese | Mn (ppm) | 467.950 | 64.556 | 368.545 | 821.714 |
| Sodium | Na (wt%) | 1.039 | 0.057 | 0.859 | 1.243 |
| Phosphorus | P (wt%) | 0.084 | 0.004 | 0.071 | 0.099 |
| Lead | Pb (ppm) | 23.185 | 2.895 | 15.270 | 31.719 |
| Selenium | Se (ppm) | 0.212 | 0.089 | 0.100 | 0.422 |
| Titanium | Ti (wt%) | 0.327 | 0.035 | 0.279 | 0.500 |
| Zinc | Zn (ppm) | 77.158 | 6.316 | 56.599 | 102.142 |