| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.407 | 0.626 | 3.051 | 6.051 |
| Arsenic | As (ppm) | 8.836 | 2.075 | 3.447 | 15.691 |
| Calcium | Ca (wt%) | 0.546 | 0.262 | 0.189 | 1.777 |
| Copper | Cu (ppm) | 10.272 | 2.843 | 3.152 | 25.831 |
| Iron | Fe (wt%) | 2.632 | 0.462 | 1.775 | 3.997 |
| Mercury | Hg (ppm) | 0.029 | 0.013 | 0.010 | 0.089 |
| Magnesium | Mg (wt%) | 0.507 | 0.099 | 0.282 | 0.853 |
| Manganese | Mn (ppm) | 583.984 | 143.646 | 258.127 | 1212.270 |
| Sodium | Na (wt%) | 0.610 | 0.065 | 0.350 | 0.903 |
| Phosphorus | P (wt%) | 0.051 | 0.005 | 0.037 | 0.064 |
| Lead | Pb (ppm) | 25.378 | 6.935 | 14.069 | 54.365 |
| Selenium | Se (ppm) | 0.148 | 0.035 | 0.100 | 0.346 |
| Titanium | Ti (wt%) | 0.288 | 0.075 | 0.175 | 0.708 |
| Zinc | Zn (ppm) | 67.714 | 11.735 | 40.898 | 91.200 |