| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.860 | 1.007 | 2.741 | 9.124 |
| Arsenic | As (ppm) | 5.188 | 3.674 | 0.898 | 37.538 |
| Calcium | Ca (wt%) | 2.641 | 0.962 | 0.633 | 9.958 |
| Copper | Cu (ppm) | 12.892 | 4.370 | 1.249 | 40.111 |
| Iron | Fe (wt%) | 2.524 | 0.959 | 1.031 | 9.149 |
| Mercury | Hg (ppm) | 0.017 | 0.015 | 0.010 | 0.206 |
| Magnesium | Mg (wt%) | 1.027 | 0.463 | 0.234 | 3.088 |
| Manganese | Mn (ppm) | 420.535 | 143.266 | 70.223 | 1151.610 |
| Sodium | Na (wt%) | 1.297 | 0.487 | 0.264 | 2.769 |
| Phosphorus | P (wt%) | 0.085 | 0.045 | 0.031 | 0.383 |
| Lead | Pb (ppm) | 22.958 | 4.630 | 11.158 | 42.975 |
| Selenium | Se (ppm) | 0.362 | 0.510 | 0.100 | 6.264 |
| Titanium | Ti (wt%) | 0.344 | 0.150 | 0.131 | 1.439 |
| Zinc | Zn (ppm) | 47.525 | 12.045 | 17.614 | 99.393 |