| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.842 | 0.709 | 0.159 | 4.035 |
| Arsenic | As (ppm) | 2.243 | 1.283 | 0.842 | 9.228 |
| Calcium | Ca (wt%) | 0.169 | 0.324 | 0.013 | 2.166 |
| Copper | Cu (ppm) | 11.791 | 13.823 | 1.121 | 106.855 |
| Iron | Fe (wt%) | 0.454 | 0.299 | 0.080 | 1.860 |
| Mercury | Hg (ppm) | 0.013 | 0.004 | 0.010 | 0.028 |
| Magnesium | Mg (wt%) | 0.104 | 0.165 | 0.010 | 1.034 |
| Manganese | Mn (ppm) | 150.558 | 96.282 | 33.752 | 645.738 |
| Sodium | Na (wt%) | 0.109 | 0.126 | 0.012 | 0.786 |
| Phosphorus | P (wt%) | 0.010 | 0.008 | 0.003 | 0.052 |
| Lead | Pb (ppm) | 6.025 | 2.084 | 2.326 | 11.939 |
| Selenium | Se (ppm) | 0.122 | 0.028 | 0.100 | 0.245 |
| Titanium | Ti (wt%) | 0.150 | 0.047 | 0.047 | 0.285 |
| Zinc | Zn (ppm) | 12.019 | 8.232 | 3.458 | 48.807 |