| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.581 | 0.798 | 0.941 | 4.705 |
| Arsenic | As (ppm) | 7.949 | 3.143 | 4.333 | 16.247 |
| Calcium | Ca (wt%) | 0.182 | 0.052 | 0.062 | 0.329 |
| Copper | Cu (ppm) | 11.623 | 3.004 | 4.894 | 19.825 |
| Iron | Fe (wt%) | 2.493 | 0.442 | 1.721 | 4.138 |
| Mercury | Hg (ppm) | 0.127 | 0.009 | 0.085 | 0.146 |
| Magnesium | Mg (wt%) | 0.177 | 0.045 | 0.064 | 0.250 |
| Manganese | Mn (ppm) | 426.390 | 95.009 | 250.874 | 788.803 |
| Sodium | Na (wt%) | 0.157 | 0.054 | 0.035 | 0.422 |
| Phosphorus | P (wt%) | 0.050 | 0.025 | 0.004 | 0.133 |
| Lead | Pb (ppm) | 66.746 | 13.343 | 30.047 | 103.357 |
| Selenium | Se (ppm) | 0.625 | 0.270 | 0.292 | 2.101 |
| Titanium | Ti (wt%) | 1.022 | 0.220 | 0.612 | 1.463 |
| Zinc | Zn (ppm) | 61.024 | 9.467 | 33.954 | 85.409 |