| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.892 | 0.560 | 2.521 | 5.638 |
| Arsenic | As (ppm) | 1.298 | 0.387 | 0.307 | 2.924 |
| Calcium | Ca (wt%) | 0.429 | 0.162 | 0.104 | 1.112 |
| Copper | Cu (ppm) | 13.067 | 2.308 | 8.107 | 20.696 |
| Iron | Fe (wt%) | 3.000 | 0.570 | 1.710 | 4.835 |
| Mercury | Hg (ppm) | 0.361 | 0.165 | 0.023 | 0.820 |
| Magnesium | Mg (wt%) | 0.334 | 0.093 | 0.127 | 0.817 |
| Manganese | Mn (ppm) | 485.731 | 95.781 | 279.810 | 929.857 |
| Sodium | Na (wt%) | 0.256 | 0.071 | 0.080 | 0.515 |
| Phosphorus | P (wt%) | 0.044 | 0.018 | 0.017 | 0.099 |
| Lead | Pb (ppm) | 21.030 | 2.829 | 13.827 | 32.364 |
| Selenium | Se (ppm) | 0.471 | 0.338 | 0.102 | 1.694 |
| Titanium | Ti (wt%) | 0.697 | 0.159 | 0.299 | 0.984 |
| Zinc | Zn (ppm) | 45.956 | 11.444 | 22.172 | 71.398 |