| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.670 | 0.540 | 4.607 | 8.152 |
| Arsenic | As (ppm) | 6.457 | 0.988 | 3.920 | 10.071 |
| Calcium | Ca (wt%) | 1.785 | 1.401 | 0.565 | 10.280 |
| Copper | Cu (ppm) | 11.739 | 2.130 | 4.229 | 19.362 |
| Iron | Fe (wt%) | 3.164 | 0.586 | 1.900 | 6.327 |
| Mercury | Hg (ppm) | 0.024 | 0.010 | 0.010 | 0.069 |
| Magnesium | Mg (wt%) | 0.475 | 0.133 | 0.266 | 0.906 |
| Manganese | Mn (ppm) | 913.807 | 190.124 | 449.948 | 1429.170 |
| Sodium | Na (wt%) | 1.570 | 0.302 | 0.700 | 2.295 |
| Phosphorus | P (wt%) | 0.076 | 0.022 | 0.027 | 0.131 |
| Lead | Pb (ppm) | 25.844 | 5.367 | 16.412 | 40.915 |
| Selenium | Se (ppm) | 0.208 | 0.083 | 0.101 | 0.495 |
| Titanium | Ti (wt%) | 0.549 | 0.150 | 0.259 | 1.234 |
| Zinc | Zn (ppm) | 107.838 | 17.255 | 67.224 | 177.898 |