| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.143 | 0.849 | 0.547 | 5.740 |
| Arsenic | As (ppm) | 3.829 | 1.958 | 1.135 | 13.489 |
| Calcium | Ca (wt%) | 0.068 | 0.041 | 0.016 | 0.287 |
| Copper | Cu (ppm) | 5.453 | 2.060 | 1.971 | 14.484 |
| Iron | Fe (wt%) | 1.022 | 0.373 | 0.231 | 2.327 |
| Mercury | Hg (ppm) | 0.029 | 0.018 | 0.010 | 0.111 |
| Magnesium | Mg (wt%) | 0.032 | 0.012 | 0.010 | 0.084 |
| Manganese | Mn (ppm) | 222.141 | 94.536 | 66.681 | 622.105 |
| Sodium | Na (wt%) | 0.006 | 0.003 | 0.003 | 0.018 |
| Phosphorus | P (wt%) | 0.022 | 0.010 | 0.006 | 0.068 |
| Lead | Pb (ppm) | 16.523 | 4.625 | 6.606 | 31.961 |
| Selenium | Se (ppm) | 0.256 | 0.097 | 0.104 | 0.690 |
| Titanium | Ti (wt%) | 0.348 | 0.068 | 0.223 | 0.590 |
| Zinc | Zn (ppm) | 22.105 | 7.978 | 7.507 | 51.780 |