| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.509 | 0.799 | 1.200 | 6.154 |
| Arsenic | As (ppm) | 5.213 | 2.040 | 2.831 | 20.110 |
| Calcium | Ca (wt%) | 1.627 | 0.743 | 0.186 | 5.537 |
| Copper | Cu (ppm) | 10.390 | 2.610 | 3.913 | 18.384 |
| Iron | Fe (wt%) | 1.587 | 0.422 | 0.497 | 3.016 |
| Mercury | Hg (ppm) | 0.018 | 0.012 | 0.010 | 0.083 |
| Magnesium | Mg (wt%) | 0.362 | 0.148 | 0.082 | 0.913 |
| Manganese | Mn (ppm) | 573.071 | 353.623 | 140.728 | 3248.290 |
| Sodium | Na (wt%) | 0.325 | 0.096 | 0.148 | 0.675 |
| Phosphorus | P (wt%) | 0.023 | 0.009 | 0.007 | 0.055 |
| Lead | Pb (ppm) | 14.745 | 9.563 | 2.816 | 75.335 |
| Selenium | Se (ppm) | 0.269 | 0.060 | 0.113 | 0.484 |
| Titanium | Ti (wt%) | 0.252 | 0.031 | 0.149 | 0.378 |
| Zinc | Zn (ppm) | 32.535 | 10.317 | 9.461 | 69.366 |