| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.275 | 0.301 | 4.064 | 6.489 |
| Arsenic | As (ppm) | 2.781 | 3.643 | 0.310 | 18.971 |
| Calcium | Ca (wt%) | 1.404 | 0.243 | 0.806 | 2.645 |
| Copper | Cu (ppm) | 8.426 | 2.834 | 1.252 | 25.658 |
| Iron | Fe (wt%) | 2.106 | 0.735 | 0.894 | 4.092 |
| Mercury | Hg (ppm) | 0.034 | 0.010 | 0.013 | 0.094 |
| Magnesium | Mg (wt%) | 0.487 | 0.209 | 0.187 | 1.265 |
| Manganese | Mn (ppm) | 1124.480 | 232.511 | 502.565 | 2385.980 |
| Sodium | Na (wt%) | 1.747 | 0.195 | 1.234 | 2.215 |
| Phosphorus | P (wt%) | 0.064 | 0.015 | 0.020 | 0.149 |
| Lead | Pb (ppm) | 25.813 | 4.869 | 14.430 | 47.748 |
| Selenium | Se (ppm) | 0.116 | 0.025 | 0.100 | 0.297 |
| Titanium | Ti (wt%) | 0.611 | 0.156 | 0.295 | 1.264 |
| Zinc | Zn (ppm) | 34.777 | 16.830 | 12.591 | 91.696 |