| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.297 | 0.727 | 1.115 | 6.277 |
| Arsenic | As (ppm) | 4.945 | 1.561 | 1.935 | 14.835 |
| Calcium | Ca (wt%) | 0.216 | 0.444 | 0.021 | 4.781 |
| Copper | Cu (ppm) | 7.629 | 2.475 | 3.358 | 20.275 |
| Iron | Fe (wt%) | 1.337 | 0.334 | 0.531 | 2.536 |
| Mercury | Hg (ppm) | 0.024 | 0.005 | 0.010 | 0.042 |
| Magnesium | Mg (wt%) | 0.130 | 0.049 | 0.041 | 0.337 |
| Manganese | Mn (ppm) | 379.314 | 134.557 | 87.478 | 1140.830 |
| Sodium | Na (wt%) | 0.063 | 0.029 | 0.020 | 0.183 |
| Phosphorus | P (wt%) | 0.018 | 0.005 | 0.007 | 0.042 |
| Lead | Pb (ppm) | 13.342 | 2.827 | 5.470 | 26.453 |
| Selenium | Se (ppm) | 0.250 | 0.047 | 0.150 | 0.570 |
| Titanium | Ti (wt%) | 0.234 | 0.038 | 0.136 | 0.370 |
| Zinc | Zn (ppm) | 32.775 | 7.860 | 13.306 | 71.994 |