| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.314 | 0.822 | 1.730 | 5.419 |
| Arsenic | As (ppm) | 1.137 | 0.191 | 0.862 | 1.803 |
| Calcium | Ca (wt%) | 0.331 | 0.180 | 0.065 | 0.723 |
| Copper | Cu (ppm) | 6.468 | 1.764 | 2.238 | 11.432 |
| Iron | Fe (wt%) | 2.859 | 0.986 | 1.259 | 7.576 |
| Mercury | Hg (ppm) | 0.030 | 0.004 | 0.020 | 0.049 |
| Magnesium | Mg (wt%) | 0.140 | 0.030 | 0.082 | 0.227 |
| Manganese | Mn (ppm) | 528.830 | 279.999 | 182.979 | 1855.100 |
| Sodium | Na (wt%) | 0.194 | 0.068 | 0.079 | 0.351 |
| Phosphorus | P (wt%) | 0.014 | 0.002 | 0.010 | 0.020 |
| Lead | Pb (ppm) | 21.438 | 2.761 | 16.493 | 27.738 |
| Selenium | Se (ppm) | 0.183 | 0.037 | 0.103 | 0.290 |
| Titanium | Ti (wt%) | 0.513 | 0.121 | 0.148 | 0.734 |
| Zinc | Zn (ppm) | 31.150 | 7.624 | 17.632 | 61.862 |