| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.510 | 0.269 | 0.058 | 1.464 |
| Arsenic | As (ppm) | 2.107 | 0.888 | 0.760 | 5.726 |
| Calcium | Ca (wt%) | 7.794 | 5.224 | 0.959 | 28.151 |
| Copper | Cu (ppm) | 12.743 | 7.422 | 4.123 | 70.671 |
| Iron | Fe (wt%) | 0.251 | 0.086 | 0.080 | 0.632 |
| Mercury | Hg (ppm) | 0.032 | 0.013 | 0.010 | 0.075 |
| Magnesium | Mg (wt%) | 0.130 | 0.139 | 0.026 | 1.203 |
| Manganese | Mn (ppm) | 47.486 | 12.863 | 16.428 | 113.586 |
| Sodium | Na (wt%) | 0.052 | 0.037 | 0.013 | 0.233 |
| Phosphorus | P (wt%) | 0.065 | 0.047 | 0.009 | 0.263 |
| Lead | Pb (ppm) | 19.605 | 13.855 | 2.432 | 89.836 |
| Selenium | Se (ppm) | 0.390 | 0.156 | 0.109 | 0.983 |
| Titanium | Ti (wt%) | 0.094 | 0.031 | 0.004 | 0.205 |
| Zinc | Zn (ppm) | 18.095 | 7.846 | 1.563 | 68.255 |