| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.999 | 0.920 | 1.062 | 5.523 |
| Arsenic | As (ppm) | 17.268 | 6.098 | 3.906 | 31.721 |
| Calcium | Ca (wt%) | 0.349 | 0.313 | 0.072 | 1.804 |
| Copper | Cu (ppm) | 10.467 | 2.368 | 4.113 | 18.860 |
| Iron | Fe (wt%) | 3.180 | 0.921 | 0.767 | 4.749 |
| Mercury | Hg (ppm) | 0.186 | 0.311 | 0.012 | 2.243 |
| Magnesium | Mg (wt%) | 0.259 | 0.132 | 0.123 | 0.975 |
| Manganese | Mn (ppm) | 1066.990 | 142.020 | 368.275 | 1349.310 |
| Sodium | Na (wt%) | 0.071 | 0.016 | 0.033 | 0.125 |
| Phosphorus | P (wt%) | 0.045 | 0.008 | 0.019 | 0.060 |
| Lead | Pb (ppm) | 19.766 | 3.310 | 14.187 | 41.138 |
| Selenium | Se (ppm) | 0.511 | 0.175 | 0.113 | 1.191 |
| Titanium | Ti (wt%) | 0.181 | 0.053 | 0.077 | 0.319 |
| Zinc | Zn (ppm) | 71.389 | 18.442 | 32.358 | 115.857 |