| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.717 | 0.957 | 1.076 | 5.109 |
| Arsenic | As (ppm) | 4.709 | 1.256 | 1.752 | 7.123 |
| Calcium | Ca (wt%) | 0.296 | 0.230 | 0.058 | 1.266 |
| Copper | Cu (ppm) | 8.993 | 3.896 | 2.817 | 20.621 |
| Iron | Fe (wt%) | 1.878 | 0.594 | 0.864 | 3.101 |
| Mercury | Hg (ppm) | 0.045 | 0.009 | 0.030 | 0.088 |
| Magnesium | Mg (wt%) | 0.273 | 0.125 | 0.099 | 0.550 |
| Manganese | Mn (ppm) | 475.265 | 214.736 | 166.940 | 927.393 |
| Sodium | Na (wt%) | 0.110 | 0.057 | 0.029 | 0.294 |
| Phosphorus | P (wt%) | 0.028 | 0.012 | 0.007 | 0.057 |
| Lead | Pb (ppm) | 14.923 | 4.703 | 7.657 | 29.099 |
| Selenium | Se (ppm) | 0.229 | 0.067 | 0.105 | 0.392 |
| Titanium | Ti (wt%) | 0.258 | 0.047 | 0.183 | 0.380 |
| Zinc | Zn (ppm) | 57.675 | 16.847 | 28.355 | 95.672 |