| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.263 | 0.651 | 1.966 | 5.709 |
| Arsenic | As (ppm) | 7.130 | 2.080 | 2.500 | 15.000 |
| Calcium | Ca (wt%) | 0.263 | 0.319 | 0.057 | 1.938 |
| Copper | Cu (ppm) | 10.704 | 2.897 | 4.001 | 19.559 |
| Iron | Fe (wt%) | 2.178 | 0.378 | 1.490 | 3.640 |
| Mercury | Hg (ppm) | 0.039 | 0.012 | 0.011 | 0.070 |
| Magnesium | Mg (wt%) | 0.304 | 0.072 | 0.161 | 0.655 |
| Manganese | Mn (ppm) | 453.955 | 134.827 | 124.048 | 813.306 |
| Sodium | Na (wt%) | 0.209 | 0.089 | 0.030 | 0.490 |
| Phosphorus | P (wt%) | 0.029 | 0.007 | 0.015 | 0.060 |
| Lead | Pb (ppm) | 20.091 | 4.430 | 11.395 | 36.243 |
| Selenium | Se (ppm) | 0.187 | 0.043 | 0.100 | 0.331 |
| Titanium | Ti (wt%) | 0.276 | 0.034 | 0.133 | 0.375 |
| Zinc | Zn (ppm) | 58.899 | 11.852 | 30.446 | 96.390 |