| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.515 | 0.313 | 0.150 | 2.145 |
| Arsenic | As (ppm) | 1.395 | 0.408 | 0.630 | 3.392 |
| Calcium | Ca (wt%) | 0.019 | 0.009 | 0.003 | 0.058 |
| Copper | Cu (ppm) | 2.474 | 1.123 | 1.022 | 6.976 |
| Iron | Fe (wt%) | 0.429 | 0.159 | 0.132 | 1.009 |
| Mercury | Hg (ppm) | 0.011 | 0.003 | 0.010 | 0.028 |
| Magnesium | Mg (wt%) | 0.026 | 0.017 | 0.005 | 0.109 |
| Manganese | Mn (ppm) | 153.837 | 60.378 | 55.710 | 400.250 |
| Sodium | Na (wt%) | 0.030 | 0.024 | 0.005 | 0.159 |
| Phosphorus | P (wt%) | 0.007 | 0.004 | 0.003 | 0.029 |
| Lead | Pb (ppm) | 9.710 | 2.315 | 2.884 | 17.967 |
| Selenium | Se (ppm) | 0.118 | 0.026 | 0.100 | 0.241 |
| Titanium | Ti (wt%) | 0.263 | 0.069 | 0.054 | 0.521 |
| Zinc | Zn (ppm) | 10.863 | 4.100 | 5.100 | 29.142 |