| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.839 | 0.159 | 0.444 | 1.170 |
| Arsenic | As (ppm) | 2.106 | 0.623 | 0.993 | 3.481 |
| Calcium | Ca (wt%) | 0.028 | 0.006 | 0.016 | 0.045 |
| Copper | Cu (ppm) | 2.137 | 0.413 | 1.066 | 3.814 |
| Iron | Fe (wt%) | 0.725 | 0.215 | 0.368 | 1.332 |
| Mercury | Hg (ppm) | 0.011 | 0.002 | 0.010 | 0.020 |
| Magnesium | Mg (wt%) | 0.034 | 0.009 | 0.019 | 0.060 |
| Manganese | Mn (ppm) | 110.988 | 33.695 | 58.505 | 264.525 |
| Sodium | Na (wt%) | 0.037 | 0.012 | 0.015 | 0.070 |
| Phosphorus | P (wt%) | 0.008 | 0.002 | 0.006 | 0.012 |
| Lead | Pb (ppm) | 6.895 | 0.739 | 5.188 | 8.887 |
| Selenium | Se (ppm) | 0.126 | 0.023 | 0.100 | 0.219 |
| Titanium | Ti (wt%) | 0.196 | 0.019 | 0.137 | 0.232 |
| Zinc | Zn (ppm) | 16.304 | 5.791 | 11.103 | 36.886 |