| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.430 | 0.117 | 0.107 | 0.783 |
| Arsenic | As (ppm) | 0.750 | 0.272 | 0.304 | 1.678 |
| Calcium | Ca (wt%) | 0.130 | 0.099 | 0.014 | 0.513 |
| Copper | Cu (ppm) | 1.923 | 0.590 | 1.018 | 4.370 |
| Iron | Fe (wt%) | 0.159 | 0.057 | 0.044 | 0.543 |
| Mercury | Hg (ppm) | 0.012 | 0.002 | 0.010 | 0.025 |
| Magnesium | Mg (wt%) | 0.023 | 0.008 | 0.008 | 0.065 |
| Manganese | Mn (ppm) | 56.435 | 24.834 | 10.384 | 204.611 |
| Sodium | Na (wt%) | 0.005 | 0.002 | 0.003 | 0.014 |
| Phosphorus | P (wt%) | 0.024 | 0.009 | 0.008 | 0.070 |
| Lead | Pb (ppm) | 8.949 | 2.823 | 5.021 | 22.859 |
| Selenium | Se (ppm) | 0.115 | 0.014 | 0.100 | 0.196 |
| Titanium | Ti (wt%) | 0.292 | 0.076 | 0.168 | 0.892 |
| Zinc | Zn (ppm) | 6.135 | 1.359 | 1.178 | 11.202 |