| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.048 | 1.443 | 3.817 | 8.635 |
| Arsenic | As (ppm) | 2.233 | 0.773 | 1.141 | 3.699 |
| Calcium | Ca (wt%) | 0.139 | 0.034 | 0.084 | 0.208 |
| Copper | Cu (ppm) | 18.407 | 5.681 | 10.853 | 30.075 |
| Iron | Fe (wt%) | 2.955 | 0.349 | 2.400 | 3.647 |
| Mercury | Hg (ppm) | 0.149 | 0.043 | 0.088 | 0.257 |
| Magnesium | Mg (wt%) | 0.190 | 0.012 | 0.163 | 0.217 |
| Manganese | Mn (ppm) | 783.400 | 117.961 | 599.549 | 1018.900 |
| Sodium | Na (wt%) | 0.167 | 0.034 | 0.090 | 0.282 |
| Phosphorus | P (wt%) | 0.039 | 0.006 | 0.027 | 0.049 |
| Lead | Pb (ppm) | 45.599 | 6.570 | 34.534 | 55.570 |
| Selenium | Se (ppm) | 0.404 | 0.186 | 0.164 | 0.773 |
| Titanium | Ti (wt%) | 0.872 | 0.057 | 0.739 | 0.956 |
| Zinc | Zn (ppm) | 48.087 | 8.497 | 37.150 | 65.585 |