| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.387 | 0.996 | 1.124 | 5.628 |
| Arsenic | As (ppm) | 7.839 | 2.310 | 1.737 | 15.043 |
| Calcium | Ca (wt%) | 1.021 | 1.249 | 0.065 | 8.606 |
| Copper | Cu (ppm) | 9.583 | 3.463 | 2.094 | 20.826 |
| Iron | Fe (wt%) | 1.952 | 0.564 | 0.685 | 3.394 |
| Mercury | Hg (ppm) | 0.014 | 0.006 | 0.010 | 0.046 |
| Magnesium | Mg (wt%) | 0.280 | 0.119 | 0.075 | 0.678 |
| Manganese | Mn (ppm) | 561.581 | 220.720 | 72.212 | 1312.140 |
| Sodium | Na (wt%) | 0.383 | 0.118 | 0.099 | 0.692 |
| Phosphorus | P (wt%) | 0.028 | 0.010 | 0.005 | 0.055 |
| Lead | Pb (ppm) | 19.823 | 7.388 | 5.218 | 50.927 |
| Selenium | Se (ppm) | 0.191 | 0.097 | 0.100 | 0.762 |
| Titanium | Ti (wt%) | 0.226 | 0.057 | 0.083 | 0.493 |
| Zinc | Zn (ppm) | 43.500 | 15.311 | 13.398 | 106.752 |