| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.958 | 0.402 | 2.084 | 3.947 |
| Arsenic | As (ppm) | 3.180 | 0.743 | 1.390 | 5.508 |
| Calcium | Ca (wt%) | 0.472 | 0.425 | 0.170 | 1.669 |
| Copper | Cu (ppm) | 5.234 | 2.019 | 2.075 | 13.371 |
| Iron | Fe (wt%) | 1.367 | 0.219 | 0.770 | 2.004 |
| Mercury | Hg (ppm) | 0.013 | 0.005 | 0.010 | 0.030 |
| Magnesium | Mg (wt%) | 0.180 | 0.024 | 0.097 | 0.247 |
| Manganese | Mn (ppm) | 236.064 | 90.030 | 122.076 | 454.000 |
| Sodium | Na (wt%) | 0.157 | 0.026 | 0.121 | 0.209 |
| Phosphorus | P (wt%) | 0.021 | 0.004 | 0.017 | 0.035 |
| Lead | Pb (ppm) | 14.627 | 2.538 | 10.183 | 22.737 |
| Selenium | Se (ppm) | 0.160 | 0.043 | 0.100 | 0.296 |
| Titanium | Ti (wt%) | 0.239 | 0.039 | 0.147 | 0.299 |
| Zinc | Zn (ppm) | 27.830 | 3.997 | 17.567 | 38.576 |