| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.526 | 0.421 | 4.452 | 6.770 |
| Arsenic | As (ppm) | 7.112 | 1.652 | 3.799 | 14.808 |
| Calcium | Ca (wt%) | 2.796 | 1.412 | 0.768 | 6.706 |
| Copper | Cu (ppm) | 18.172 | 5.448 | 9.143 | 36.742 |
| Iron | Fe (wt%) | 2.182 | 0.288 | 1.462 | 3.299 |
| Mercury | Hg (ppm) | 0.028 | 0.011 | 0.010 | 0.095 |
| Magnesium | Mg (wt%) | 1.214 | 0.397 | 0.479 | 2.741 |
| Manganese | Mn (ppm) | 365.378 | 58.323 | 218.032 | 632.270 |
| Sodium | Na (wt%) | 0.870 | 0.131 | 0.504 | 1.398 |
| Phosphorus | P (wt%) | 0.069 | 0.010 | 0.042 | 0.125 |
| Lead | Pb (ppm) | 14.534 | 2.153 | 6.394 | 20.625 |
| Selenium | Se (ppm) | 0.896 | 1.078 | 0.114 | 10.693 |
| Titanium | Ti (wt%) | 0.234 | 0.025 | 0.169 | 0.333 |
| Zinc | Zn (ppm) | 75.965 | 19.243 | 44.841 | 189.822 |