| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.811 | 0.444 | 0.255 | 2.714 |
| Arsenic | As (ppm) | 3.144 | 1.244 | 1.221 | 11.082 |
| Calcium | Ca (wt%) | 0.107 | 0.112 | 0.013 | 0.854 |
| Copper | Cu (ppm) | 5.173 | 4.115 | 1.432 | 36.612 |
| Iron | Fe (wt%) | 0.673 | 0.323 | 0.176 | 2.400 |
| Mercury | Hg (ppm) | 0.012 | 0.004 | 0.010 | 0.034 |
| Magnesium | Mg (wt%) | 0.045 | 0.031 | 0.011 | 0.166 |
| Manganese | Mn (ppm) | 253.228 | 162.759 | 43.872 | 1387.120 |
| Sodium | Na (wt%) | 0.026 | 0.016 | 0.007 | 0.093 |
| Phosphorus | P (wt%) | 0.010 | 0.003 | 0.003 | 0.025 |
| Lead | Pb (ppm) | 15.897 | 7.126 | 2.633 | 60.103 |
| Selenium | Se (ppm) | 0.156 | 0.064 | 0.101 | 0.433 |
| Titanium | Ti (wt%) | 0.353 | 0.093 | 0.061 | 0.670 |
| Zinc | Zn (ppm) | 19.698 | 7.624 | 4.816 | 44.536 |