| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.980 | 0.387 | 2.680 | 4.787 |
| Arsenic | As (ppm) | 4.793 | 1.172 | 2.737 | 9.870 |
| Calcium | Ca (wt%) | 4.089 | 2.244 | 0.505 | 11.208 |
| Copper | Cu (ppm) | 9.706 | 1.545 | 5.008 | 14.204 |
| Iron | Fe (wt%) | 1.559 | 0.253 | 0.791 | 2.119 |
| Mercury | Hg (ppm) | 0.014 | 0.004 | 0.010 | 0.029 |
| Magnesium | Mg (wt%) | 0.965 | 0.323 | 0.276 | 2.179 |
| Manganese | Mn (ppm) | 359.197 | 80.719 | 226.177 | 706.320 |
| Sodium | Na (wt%) | 0.634 | 0.095 | 0.476 | 0.937 |
| Phosphorus | P (wt%) | 0.035 | 0.005 | 0.015 | 0.050 |
| Lead | Pb (ppm) | 19.672 | 2.730 | 13.018 | 30.596 |
| Selenium | Se (ppm) | 0.596 | 0.559 | 0.100 | 3.303 |
| Titanium | Ti (wt%) | 0.224 | 0.017 | 0.175 | 0.262 |
| Zinc | Zn (ppm) | 29.635 | 5.651 | 11.030 | 43.708 |