| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.039 | 0.738 | 0.445 | 3.274 |
| Arsenic | As (ppm) | 14.438 | 6.959 | 1.909 | 31.517 |
| Calcium | Ca (wt%) | 0.219 | 0.140 | 0.027 | 0.664 |
| Copper | Cu (ppm) | 6.868 | 2.603 | 1.156 | 14.558 |
| Iron | Fe (wt%) | 4.837 | 2.016 | 0.926 | 9.335 |
| Mercury | Hg (ppm) | 0.076 | 0.011 | 0.050 | 0.099 |
| Magnesium | Mg (wt%) | 0.225 | 0.124 | 0.030 | 0.663 |
| Manganese | Mn (ppm) | 767.388 | 351.864 | 220.519 | 1743.500 |
| Sodium | Na (wt%) | 0.137 | 0.062 | 0.025 | 0.251 |
| Phosphorus | P (wt%) | 0.072 | 0.049 | 0.003 | 0.261 |
| Lead | Pb (ppm) | 53.428 | 13.327 | 25.956 | 97.247 |
| Selenium | Se (ppm) | 0.593 | 0.246 | 0.200 | 1.253 |
| Titanium | Ti (wt%) | 1.296 | 0.457 | 0.337 | 2.891 |
| Zinc | Zn (ppm) | 55.726 | 18.667 | 21.978 | 109.364 |