| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.981 | 0.504 | 1.004 | 3.830 |
| Arsenic | As (ppm) | 4.545 | 1.348 | 1.265 | 8.567 |
| Calcium | Ca (wt%) | 0.378 | 0.511 | 0.080 | 3.495 |
| Copper | Cu (ppm) | 6.557 | 1.134 | 3.242 | 10.621 |
| Iron | Fe (wt%) | 1.184 | 0.313 | 0.571 | 2.174 |
| Mercury | Hg (ppm) | 0.042 | 0.008 | 0.030 | 0.069 |
| Magnesium | Mg (wt%) | 0.130 | 0.048 | 0.049 | 0.371 |
| Manganese | Mn (ppm) | 464.538 | 158.288 | 120.944 | 1076.920 |
| Sodium | Na (wt%) | 0.043 | 0.013 | 0.020 | 0.071 |
| Phosphorus | P (wt%) | 0.038 | 0.050 | 0.010 | 0.266 |
| Lead | Pb (ppm) | 36.083 | 68.710 | 7.294 | 504.449 |
| Selenium | Se (ppm) | 0.229 | 0.078 | 0.102 | 0.486 |
| Titanium | Ti (wt%) | 0.232 | 0.054 | 0.163 | 0.437 |
| Zinc | Zn (ppm) | 41.363 | 15.489 | 14.932 | 121.720 |