| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.439 | 0.394 | 3.904 | 5.483 |
| Arsenic | As (ppm) | 8.501 | 1.036 | 6.862 | 10.889 |
| Calcium | Ca (wt%) | 2.365 | 0.793 | 0.965 | 4.331 |
| Copper | Cu (ppm) | 17.669 | 2.777 | 14.098 | 24.959 |
| Iron | Fe (wt%) | 3.977 | 0.463 | 3.296 | 5.250 |
| Mercury | Hg (ppm) | 0.046 | 0.008 | 0.032 | 0.058 |
| Magnesium | Mg (wt%) | 0.870 | 0.215 | 0.549 | 1.425 |
| Manganese | Mn (ppm) | 3282.700 | 1195.940 | 1611.450 | 6212.970 |
| Sodium | Na (wt%) | 0.492 | 0.030 | 0.422 | 0.535 |
| Phosphorus | P (wt%) | 0.075 | 0.012 | 0.055 | 0.104 |
| Lead | Pb (ppm) | 33.503 | 5.174 | 26.208 | 46.861 |
| Selenium | Se (ppm) | 0.566 | 0.100 | 0.396 | 0.818 |
| Titanium | Ti (wt%) | 0.274 | 0.015 | 0.250 | 0.312 |
| Zinc | Zn (ppm) | 107.224 | 18.063 | 87.154 | 155.673 |