| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.823 | 0.554 | 0.166 | 5.434 |
| Arsenic | As (ppm) | 1.491 | 1.188 | 0.651 | 12.086 |
| Calcium | Ca (wt%) | 0.140 | 0.067 | 0.022 | 0.579 |
| Copper | Cu (ppm) | 1.937 | 1.240 | 1.000 | 10.300 |
| Iron | Fe (wt%) | 0.566 | 0.270 | 0.250 | 2.715 |
| Mercury | Hg (ppm) | 1.052 | 2.738 | 0.010 | 26.784 |
| Magnesium | Mg (wt%) | 0.041 | 0.058 | 0.005 | 0.549 |
| Manganese | Mn (ppm) | 193.416 | 57.233 | 84.464 | 453.649 |
| Sodium | Na (wt%) | 0.094 | 0.053 | 0.013 | 0.530 |
| Phosphorus | P (wt%) | 0.011 | 0.008 | 0.003 | 0.065 |
| Lead | Pb (ppm) | 18.369 | 2.982 | 11.446 | 31.142 |
| Selenium | Se (ppm) | 0.141 | 0.074 | 0.100 | 0.728 |
| Titanium | Ti (wt%) | 0.494 | 0.096 | 0.298 | 0.970 |
| Zinc | Zn (ppm) | 10.088 | 6.810 | 1.659 | 59.560 |