| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.258 | 0.702 | 0.867 | 4.607 |
| Arsenic | As (ppm) | 3.255 | 2.171 | 0.884 | 19.362 |
| Calcium | Ca (wt%) | 0.042 | 0.023 | 0.011 | 0.151 |
| Copper | Cu (ppm) | 4.861 | 1.099 | 2.242 | 9.270 |
| Iron | Fe (wt%) | 1.127 | 0.277 | 0.513 | 2.196 |
| Mercury | Hg (ppm) | 0.035 | 0.024 | 0.010 | 0.136 |
| Magnesium | Mg (wt%) | 0.037 | 0.011 | 0.018 | 0.078 |
| Manganese | Mn (ppm) | 156.604 | 38.769 | 81.838 | 256.751 |
| Sodium | Na (wt%) | 0.011 | 0.005 | 0.003 | 0.031 |
| Phosphorus | P (wt%) | 0.022 | 0.005 | 0.011 | 0.037 |
| Lead | Pb (ppm) | 21.525 | 2.686 | 16.424 | 32.105 |
| Selenium | Se (ppm) | 0.258 | 0.066 | 0.110 | 0.497 |
| Titanium | Ti (wt%) | 0.446 | 0.037 | 0.328 | 0.581 |
| Zinc | Zn (ppm) | 16.879 | 3.814 | 8.928 | 30.276 |