| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.869 | 0.264 | 0.380 | 2.276 |
| Arsenic | As (ppm) | 1.961 | 0.567 | 0.984 | 3.577 |
| Calcium | Ca (wt%) | 0.029 | 0.012 | 0.009 | 0.105 |
| Copper | Cu (ppm) | 5.078 | 1.025 | 2.260 | 7.856 |
| Iron | Fe (wt%) | 0.543 | 0.146 | 0.231 | 1.008 |
| Mercury | Hg (ppm) | 0.032 | 0.007 | 0.012 | 0.068 |
| Magnesium | Mg (wt%) | 0.023 | 0.007 | 0.009 | 0.047 |
| Manganese | Mn (ppm) | 163.289 | 46.530 | 85.439 | 393.547 |
| Sodium | Na (wt%) | 0.011 | 0.004 | 0.005 | 0.028 |
| Phosphorus | P (wt%) | 0.022 | 0.005 | 0.009 | 0.050 |
| Lead | Pb (ppm) | 10.645 | 2.407 | 3.396 | 19.239 |
| Selenium | Se (ppm) | 0.150 | 0.048 | 0.101 | 0.483 |
| Titanium | Ti (wt%) | 0.540 | 0.064 | 0.362 | 0.759 |
| Zinc | Zn (ppm) | 21.981 | 14.758 | 7.110 | 129.460 |