| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.427 | 1.458 | 3.421 | 8.951 |
| Arsenic | As (ppm) | 1.195 | 0.236 | 0.777 | 2.068 |
| Calcium | Ca (wt%) | 0.690 | 0.181 | 0.246 | 1.306 |
| Copper | Cu (ppm) | 10.448 | 1.594 | 7.357 | 14.655 |
| Iron | Fe (wt%) | 2.955 | 0.686 | 1.894 | 5.596 |
| Mercury | Hg (ppm) | 0.236 | 0.035 | 0.148 | 0.305 |
| Magnesium | Mg (wt%) | 0.254 | 0.033 | 0.174 | 0.314 |
| Manganese | Mn (ppm) | 677.416 | 123.071 | 417.126 | 1083.180 |
| Sodium | Na (wt%) | 0.413 | 0.113 | 0.177 | 0.699 |
| Phosphorus | P (wt%) | 0.025 | 0.009 | 0.012 | 0.059 |
| Lead | Pb (ppm) | 26.926 | 1.939 | 20.072 | 32.744 |
| Selenium | Se (ppm) | 0.116 | 0.024 | 0.100 | 0.195 |
| Titanium | Ti (wt%) | 0.499 | 0.153 | 0.224 | 0.983 |
| Zinc | Zn (ppm) | 37.157 | 5.457 | 23.899 | 52.350 |