| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.443 | 0.858 | 2.209 | 7.758 |
| Arsenic | As (ppm) | 6.257 | 1.247 | 2.911 | 9.342 |
| Calcium | Ca (wt%) | 0.383 | 0.179 | 0.096 | 0.901 |
| Copper | Cu (ppm) | 12.325 | 3.481 | 6.694 | 28.168 |
| Iron | Fe (wt%) | 1.710 | 0.350 | 0.804 | 3.408 |
| Mercury | Hg (ppm) | 0.046 | 0.011 | 0.012 | 0.077 |
| Magnesium | Mg (wt%) | 0.493 | 0.226 | 0.113 | 1.152 |
| Manganese | Mn (ppm) | 478.749 | 129.088 | 205.658 | 879.726 |
| Sodium | Na (wt%) | 0.692 | 0.108 | 0.353 | 0.923 |
| Phosphorus | P (wt%) | 0.049 | 0.009 | 0.012 | 0.064 |
| Lead | Pb (ppm) | 18.216 | 3.884 | 6.581 | 27.839 |
| Selenium | Se (ppm) | 0.259 | 0.093 | 0.103 | 0.653 |
| Titanium | Ti (wt%) | 0.277 | 0.026 | 0.184 | 0.396 |
| Zinc | Zn (ppm) | 100.578 | 81.014 | 25.282 | 769.515 |