| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.233 | 0.947 | 2.323 | 6.744 |
| Arsenic | As (ppm) | 6.021 | 2.298 | 2.197 | 19.000 |
| Calcium | Ca (wt%) | 4.476 | 2.784 | 0.470 | 15.282 |
| Copper | Cu (ppm) | 13.097 | 3.353 | 6.128 | 21.954 |
| Iron | Fe (wt%) | 1.673 | 0.380 | 0.919 | 2.787 |
| Mercury | Hg (ppm) | 0.016 | 0.011 | 0.005 | 0.059 |
| Magnesium | Mg (wt%) | 1.405 | 0.756 | 0.361 | 4.372 |
| Manganese | Mn (ppm) | 355.626 | 104.623 | 147.961 | 737.687 |
| Sodium | Na (wt%) | 0.783 | 0.494 | 0.197 | 2.498 |
| Phosphorus | P (wt%) | 0.083 | 0.061 | 0.029 | 0.363 |
| Lead | Pb (ppm) | 14.077 | 3.811 | 6.381 | 27.589 |
| Selenium | Se (ppm) | 0.197 | 0.112 | 0.100 | 0.600 |
| Titanium | Ti (wt%) | 0.179 | 0.036 | 0.114 | 0.271 |
| Zinc | Zn (ppm) | 46.074 | 12.168 | 18.571 | 90.941 |