| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 8.592 | 0.836 | 6.308 | 11.670 |
| Arsenic | As (ppm) | 4.711 | 1.598 | 2.176 | 15.694 |
| Calcium | Ca (wt%) | 1.581 | 0.751 | 0.361 | 3.273 |
| Copper | Cu (ppm) | 38.395 | 14.003 | 14.845 | 108.720 |
| Iron | Fe (wt%) | 4.163 | 0.576 | 2.490 | 6.472 |
| Mercury | Hg (ppm) | 0.089 | 0.083 | 0.012 | 0.762 |
| Magnesium | Mg (wt%) | 0.869 | 0.220 | 0.474 | 1.564 |
| Manganese | Mn (ppm) | 812.971 | 146.947 | 324.255 | 1346.560 |
| Sodium | Na (wt%) | 1.755 | 0.630 | 0.592 | 3.265 |
| Phosphorus | P (wt%) | 0.101 | 0.038 | 0.029 | 0.334 |
| Lead | Pb (ppm) | 6.963 | 2.456 | 2.055 | 12.886 |
| Selenium | Se (ppm) | 0.388 | 0.177 | 0.103 | 0.887 |
| Titanium | Ti (wt%) | 0.599 | 0.088 | 0.415 | 0.956 |
| Zinc | Zn (ppm) | 79.143 | 8.675 | 46.225 | 113.983 |