| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.178 | 0.372 | 2.926 | 5.326 |
| Arsenic | As (ppm) | 11.433 | 1.934 | 8.345 | 18.243 |
| Calcium | Ca (wt%) | 0.192 | 0.177 | 0.067 | 0.998 |
| Copper | Cu (ppm) | 10.148 | 1.319 | 5.170 | 12.592 |
| Iron | Fe (wt%) | 3.018 | 0.616 | 0.889 | 4.722 |
| Mercury | Hg (ppm) | 0.044 | 0.007 | 0.028 | 0.060 |
| Magnesium | Mg (wt%) | 0.267 | 0.032 | 0.172 | 0.389 |
| Manganese | Mn (ppm) | 937.336 | 384.223 | 211.714 | 2128.090 |
| Sodium | Na (wt%) | 0.303 | 0.224 | 0.122 | 1.350 |
| Phosphorus | P (wt%) | 0.042 | 0.006 | 0.027 | 0.062 |
| Lead | Pb (ppm) | 22.173 | 3.910 | 15.165 | 34.552 |
| Selenium | Se (ppm) | 0.603 | 0.103 | 0.334 | 0.889 |
| Titanium | Ti (wt%) | 0.246 | 0.016 | 0.215 | 0.308 |
| Zinc | Zn (ppm) | 64.176 | 9.899 | 30.110 | 90.031 |