| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.383 | 0.580 | 3.743 | 6.891 |
| Arsenic | As (ppm) | 1.232 | 0.295 | 0.306 | 2.120 |
| Calcium | Ca (wt%) | 0.831 | 0.425 | 0.273 | 2.129 |
| Copper | Cu (ppm) | 9.899 | 1.471 | 6.020 | 13.526 |
| Iron | Fe (wt%) | 2.495 | 0.524 | 1.233 | 4.036 |
| Mercury | Hg (ppm) | 0.050 | 0.019 | 0.026 | 0.110 |
| Magnesium | Mg (wt%) | 0.272 | 0.162 | 0.085 | 0.784 |
| Manganese | Mn (ppm) | 862.895 | 265.679 | 264.623 | 1557.910 |
| Sodium | Na (wt%) | 0.655 | 0.156 | 0.367 | 1.195 |
| Phosphorus | P (wt%) | 0.030 | 0.009 | 0.009 | 0.058 |
| Lead | Pb (ppm) | 30.971 | 5.451 | 17.780 | 42.305 |
| Selenium | Se (ppm) | 0.131 | 0.027 | 0.100 | 0.200 |
| Titanium | Ti (wt%) | 0.550 | 0.168 | 0.262 | 1.054 |
| Zinc | Zn (ppm) | 30.740 | 5.505 | 17.084 | 48.430 |