| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.608 | 1.212 | 0.428 | 7.203 |
| Arsenic | As (ppm) | 1.919 | 0.434 | 0.361 | 5.018 |
| Calcium | Ca (wt%) | 0.424 | 0.362 | 0.017 | 2.175 |
| Copper | Cu (ppm) | 6.191 | 1.561 | 1.944 | 13.768 |
| Iron | Fe (wt%) | 1.843 | 0.774 | 0.368 | 6.179 |
| Mercury | Hg (ppm) | 0.033 | 0.007 | 0.012 | 0.050 |
| Magnesium | Mg (wt%) | 0.113 | 0.072 | 0.011 | 0.533 |
| Manganese | Mn (ppm) | 404.462 | 140.093 | 118.809 | 1042.510 |
| Sodium | Na (wt%) | 0.269 | 0.186 | 0.009 | 0.891 |
| Phosphorus | P (wt%) | 0.014 | 0.003 | 0.006 | 0.030 |
| Lead | Pb (ppm) | 17.497 | 3.145 | 8.284 | 29.293 |
| Selenium | Se (ppm) | 0.142 | 0.035 | 0.100 | 0.265 |
| Titanium | Ti (wt%) | 0.560 | 0.120 | 0.100 | 0.971 |
| Zinc | Zn (ppm) | 23.841 | 7.402 | 1.973 | 50.597 |