| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.505 | 1.099 | 2.234 | 6.408 |
| Arsenic | As (ppm) | 7.123 | 3.862 | 2.073 | 15.100 |
| Calcium | Ca (wt%) | 0.378 | 0.063 | 0.218 | 0.544 |
| Copper | Cu (ppm) | 8.978 | 2.006 | 3.000 | 12.669 |
| Iron | Fe (wt%) | 1.969 | 0.798 | 0.950 | 3.640 |
| Mercury | Hg (ppm) | 0.071 | 0.057 | 0.010 | 0.302 |
| Magnesium | Mg (wt%) | 0.220 | 0.089 | 0.107 | 0.436 |
| Manganese | Mn (ppm) | 785.633 | 81.061 | 514.730 | 938.335 |
| Sodium | Na (wt%) | 0.138 | 0.032 | 0.074 | 0.183 |
| Phosphorus | P (wt%) | 0.040 | 0.008 | 0.025 | 0.074 |
| Lead | Pb (ppm) | 23.183 | 3.928 | 13.868 | 34.532 |
| Selenium | Se (ppm) | 0.443 | 0.101 | 0.245 | 0.683 |
| Titanium | Ti (wt%) | 0.252 | 0.042 | 0.187 | 0.362 |
| Zinc | Zn (ppm) | 51.959 | 7.943 | 29.286 | 84.226 |