| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.569 | 0.615 | 1.139 | 4.708 |
| Arsenic | As (ppm) | 6.169 | 1.295 | 2.360 | 10.463 |
| Calcium | Ca (wt%) | 1.049 | 0.614 | 0.063 | 3.408 |
| Copper | Cu (ppm) | 7.825 | 1.878 | 3.505 | 13.998 |
| Iron | Fe (wt%) | 1.924 | 0.404 | 0.552 | 2.843 |
| Mercury | Hg (ppm) | 0.043 | 0.007 | 0.011 | 0.065 |
| Magnesium | Mg (wt%) | 0.222 | 0.065 | 0.057 | 0.416 |
| Manganese | Mn (ppm) | 994.446 | 377.564 | 75.139 | 2181.010 |
| Sodium | Na (wt%) | 0.059 | 0.012 | 0.024 | 0.095 |
| Phosphorus | P (wt%) | 0.181 | 0.148 | 0.012 | 0.872 |
| Lead | Pb (ppm) | 18.741 | 5.813 | 5.130 | 35.253 |
| Selenium | Se (ppm) | 0.301 | 0.123 | 0.102 | 0.663 |
| Titanium | Ti (wt%) | 0.229 | 0.062 | 0.088 | 0.404 |
| Zinc | Zn (ppm) | 69.182 | 23.439 | 12.675 | 139.844 |