| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.751 | 0.303 | 1.146 | 3.437 |
| Arsenic | As (ppm) | 4.018 | 1.821 | 1.881 | 11.645 |
| Calcium | Ca (wt%) | 0.123 | 0.074 | 0.039 | 0.483 |
| Copper | Cu (ppm) | 7.253 | 2.188 | 4.035 | 17.585 |
| Iron | Fe (wt%) | 1.184 | 0.437 | 0.585 | 2.799 |
| Mercury | Hg (ppm) | 0.058 | 0.007 | 0.035 | 0.079 |
| Magnesium | Mg (wt%) | 0.096 | 0.027 | 0.048 | 0.184 |
| Manganese | Mn (ppm) | 435.846 | 222.505 | 120.663 | 1244.720 |
| Sodium | Na (wt%) | 0.036 | 0.008 | 0.020 | 0.064 |
| Phosphorus | P (wt%) | 0.019 | 0.003 | 0.012 | 0.030 |
| Lead | Pb (ppm) | 21.688 | 30.752 | 7.130 | 320.630 |
| Selenium | Se (ppm) | 0.230 | 0.057 | 0.102 | 0.395 |
| Titanium | Ti (wt%) | 0.233 | 0.084 | 0.145 | 0.560 |
| Zinc | Zn (ppm) | 34.028 | 15.486 | 15.169 | 96.802 |