| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.375 | 0.150 | 0.122 | 0.862 |
| Arsenic | As (ppm) | 1.201 | 0.463 | 0.315 | 3.118 |
| Calcium | Ca (wt%) | 0.081 | 0.051 | 0.003 | 0.276 |
| Copper | Cu (ppm) | 1.639 | 0.471 | 1.011 | 3.427 |
| Iron | Fe (wt%) | 0.164 | 0.085 | 0.004 | 0.356 |
| Mercury | Hg (ppm) | 0.012 | 0.003 | 0.010 | 0.027 |
| Magnesium | Mg (wt%) | 0.017 | 0.008 | 0.003 | 0.044 |
| Manganese | Mn (ppm) | 63.660 | 34.956 | 10.774 | 179.440 |
| Sodium | Na (wt%) | 0.015 | 0.014 | 0.003 | 0.079 |
| Phosphorus | P (wt%) | 0.033 | 0.022 | 0.005 | 0.134 |
| Lead | Pb (ppm) | 9.544 | 3.114 | 2.092 | 16.981 |
| Selenium | Se (ppm) | 0.114 | 0.012 | 0.100 | 0.201 |
| Titanium | Ti (wt%) | 0.304 | 0.101 | 0.122 | 0.639 |
| Zinc | Zn (ppm) | 5.367 | 3.006 | 1.035 | 13.087 |