| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.581 | 0.942 | 1.619 | 8.421 |
| Arsenic | As (ppm) | 25.402 | 31.622 | 3.579 | 295.144 |
| Calcium | Ca (wt%) | 1.542 | 0.435 | 0.915 | 3.358 |
| Copper | Cu (ppm) | 22.893 | 9.133 | 8.469 | 63.827 |
| Iron | Fe (wt%) | 2.668 | 0.492 | 1.565 | 4.734 |
| Mercury | Hg (ppm) | 0.174 | 0.355 | 0.010 | 2.924 |
| Magnesium | Mg (wt%) | 0.815 | 0.222 | 0.476 | 2.168 |
| Manganese | Mn (ppm) | 556.215 | 119.019 | 318.302 | 1022.530 |
| Sodium | Na (wt%) | 0.890 | 0.338 | 0.047 | 1.896 |
| Phosphorus | P (wt%) | 0.110 | 0.027 | 0.024 | 0.226 |
| Lead | Pb (ppm) | 125.413 | 251.294 | 13.261 | 2110.380 |
| Selenium | Se (ppm) | 0.831 | 0.924 | 0.101 | 4.191 |
| Titanium | Ti (wt%) | 0.313 | 0.077 | 0.070 | 0.592 |
| Zinc | Zn (ppm) | 411.004 | 680.882 | 50.515 | 5106.030 |