| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.610 | 0.849 | 0.601 | 4.256 |
| Arsenic | As (ppm) | 1.467 | 0.538 | 0.308 | 2.856 |
| Calcium | Ca (wt%) | 0.038 | 0.039 | 0.010 | 0.257 |
| Copper | Cu (ppm) | 3.695 | 1.868 | 1.017 | 9.725 |
| Iron | Fe (wt%) | 0.700 | 0.325 | 0.223 | 1.696 |
| Mercury | Hg (ppm) | 0.020 | 0.006 | 0.010 | 0.038 |
| Magnesium | Mg (wt%) | 0.025 | 0.016 | 0.009 | 0.093 |
| Manganese | Mn (ppm) | 111.946 | 58.530 | 55.042 | 445.719 |
| Sodium | Na (wt%) | 0.028 | 0.030 | 0.006 | 0.199 |
| Phosphorus | P (wt%) | 0.015 | 0.005 | 0.008 | 0.037 |
| Lead | Pb (ppm) | 16.300 | 5.004 | 11.032 | 34.899 |
| Selenium | Se (ppm) | 0.186 | 0.090 | 0.101 | 0.528 |
| Titanium | Ti (wt%) | 0.354 | 0.074 | 0.245 | 0.703 |
| Zinc | Zn (ppm) | 12.696 | 6.628 | 4.052 | 45.917 |