| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.189 | 0.901 | 0.388 | 3.896 |
| Arsenic | As (ppm) | 3.981 | 2.067 | 0.458 | 10.944 |
| Calcium | Ca (wt%) | 0.187 | 0.175 | 0.017 | 0.860 |
| Copper | Cu (ppm) | 6.862 | 2.944 | 1.206 | 16.372 |
| Iron | Fe (wt%) | 0.812 | 0.288 | 0.139 | 1.550 |
| Mercury | Hg (ppm) | 0.017 | 0.005 | 0.010 | 0.030 |
| Magnesium | Mg (wt%) | 0.213 | 0.152 | 0.018 | 0.666 |
| Manganese | Mn (ppm) | 245.177 | 94.806 | 51.115 | 466.293 |
| Sodium | Na (wt%) | 0.327 | 0.208 | 0.023 | 0.840 |
| Phosphorus | P (wt%) | 0.018 | 0.009 | 0.006 | 0.043 |
| Lead | Pb (ppm) | 12.892 | 3.582 | 7.184 | 22.830 |
| Selenium | Se (ppm) | 0.187 | 0.057 | 0.101 | 0.343 |
| Titanium | Ti (wt%) | 0.199 | 0.023 | 0.130 | 0.250 |
| Zinc | Zn (ppm) | 24.824 | 14.757 | 4.665 | 73.121 |