| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.965 | 0.505 | 3.079 | 6.358 |
| Arsenic | As (ppm) | 8.408 | 4.394 | 2.784 | 35.713 |
| Calcium | Ca (wt%) | 4.087 | 2.192 | 0.474 | 14.803 |
| Copper | Cu (ppm) | 17.684 | 2.666 | 7.930 | 25.132 |
| Iron | Fe (wt%) | 2.341 | 0.522 | 1.057 | 5.218 |
| Mercury | Hg (ppm) | 0.027 | 0.009 | 0.010 | 0.059 |
| Magnesium | Mg (wt%) | 1.104 | 0.358 | 0.355 | 2.770 |
| Manganese | Mn (ppm) | 410.339 | 134.387 | 190.260 | 1045.460 |
| Sodium | Na (wt%) | 0.824 | 0.257 | 0.131 | 1.591 |
| Phosphorus | P (wt%) | 0.078 | 0.025 | 0.042 | 0.205 |
| Lead | Pb (ppm) | 21.169 | 2.722 | 5.506 | 29.926 |
| Selenium | Se (ppm) | 1.204 | 1.942 | 0.101 | 15.258 |
| Titanium | Ti (wt%) | 0.273 | 0.068 | 0.131 | 0.535 |
| Zinc | Zn (ppm) | 59.583 | 8.700 | 33.382 | 91.708 |