| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.892 | 0.362 | 0.230 | 2.151 |
| Arsenic | As (ppm) | 1.894 | 0.467 | 0.970 | 3.685 |
| Calcium | Ca (wt%) | 0.031 | 0.015 | 0.006 | 0.114 |
| Copper | Cu (ppm) | 3.481 | 1.196 | 1.120 | 7.307 |
| Iron | Fe (wt%) | 0.575 | 0.169 | 0.190 | 0.950 |
| Mercury | Hg (ppm) | 0.013 | 0.003 | 0.010 | 0.028 |
| Magnesium | Mg (wt%) | 0.041 | 0.015 | 0.012 | 0.086 |
| Manganese | Mn (ppm) | 257.792 | 90.805 | 67.049 | 597.119 |
| Sodium | Na (wt%) | 0.035 | 0.017 | 0.005 | 0.080 |
| Phosphorus | P (wt%) | 0.014 | 0.006 | 0.004 | 0.047 |
| Lead | Pb (ppm) | 11.875 | 3.700 | 2.653 | 20.166 |
| Selenium | Se (ppm) | 0.138 | 0.034 | 0.101 | 0.275 |
| Titanium | Ti (wt%) | 0.296 | 0.087 | 0.117 | 0.554 |
| Zinc | Zn (ppm) | 16.171 | 4.802 | 5.119 | 29.254 |