| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.681 | 0.486 | 0.982 | 3.756 |
| Arsenic | As (ppm) | 2.682 | 1.055 | 1.500 | 4.881 |
| Calcium | Ca (wt%) | 0.997 | 0.304 | 0.271 | 1.571 |
| Copper | Cu (ppm) | 5.380 | 1.186 | 1.755 | 7.644 |
| Iron | Fe (wt%) | 0.963 | 0.212 | 0.210 | 1.388 |
| Mercury | Hg (ppm) | 0.014 | 0.004 | 0.010 | 0.025 |
| Magnesium | Mg (wt%) | 0.351 | 0.165 | 0.076 | 0.862 |
| Manganese | Mn (ppm) | 176.800 | 42.671 | 60.551 | 271.277 |
| Sodium | Na (wt%) | 0.445 | 0.238 | 0.211 | 1.029 |
| Phosphorus | P (wt%) | 0.016 | 0.003 | 0.005 | 0.021 |
| Lead | Pb (ppm) | 9.215 | 2.414 | 5.000 | 14.888 |
| Selenium | Se (ppm) | 0.147 | 0.033 | 0.100 | 0.229 |
| Titanium | Ti (wt%) | 0.235 | 0.034 | 0.093 | 0.261 |
| Zinc | Zn (ppm) | 25.666 | 5.255 | 8.755 | 36.436 |