| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.149 | 1.183 | 1.587 | 6.776 |
| Arsenic | As (ppm) | 5.725 | 2.178 | 2.114 | 12.749 |
| Calcium | Ca (wt%) | 0.381 | 0.147 | 0.086 | 0.739 |
| Copper | Cu (ppm) | 10.131 | 4.180 | 3.727 | 23.795 |
| Iron | Fe (wt%) | 1.517 | 0.457 | 0.546 | 2.700 |
| Mercury | Hg (ppm) | 0.046 | 0.015 | 0.012 | 0.077 |
| Magnesium | Mg (wt%) | 0.323 | 0.140 | 0.067 | 0.703 |
| Manganese | Mn (ppm) | 305.395 | 92.037 | 142.567 | 768.555 |
| Sodium | Na (wt%) | 0.622 | 0.176 | 0.173 | 0.935 |
| Phosphorus | P (wt%) | 0.037 | 0.012 | 0.011 | 0.064 |
| Lead | Pb (ppm) | 20.353 | 4.982 | 11.805 | 42.049 |
| Selenium | Se (ppm) | 0.261 | 0.093 | 0.103 | 0.572 |
| Titanium | Ti (wt%) | 0.279 | 0.021 | 0.218 | 0.362 |
| Zinc | Zn (ppm) | 56.690 | 32.291 | 16.243 | 205.703 |