| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.738 | 0.693 | 0.080 | 5.343 |
| Arsenic | As (ppm) | 1.866 | 1.205 | 0.321 | 10.410 |
| Calcium | Ca (wt%) | 0.027 | 0.028 | 0.006 | 0.240 |
| Copper | Cu (ppm) | 3.131 | 1.995 | 1.004 | 11.399 |
| Iron | Fe (wt%) | 0.524 | 0.352 | 0.036 | 2.554 |
| Mercury | Hg (ppm) | 0.022 | 0.014 | 0.010 | 0.085 |
| Magnesium | Mg (wt%) | 0.020 | 0.014 | 0.003 | 0.076 |
| Manganese | Mn (ppm) | 97.649 | 71.697 | 10.497 | 439.953 |
| Sodium | Na (wt%) | 0.007 | 0.005 | 0.003 | 0.024 |
| Phosphorus | P (wt%) | 0.007 | 0.004 | 0.003 | 0.036 |
| Lead | Pb (ppm) | 18.207 | 14.436 | 2.022 | 112.791 |
| Selenium | Se (ppm) | 0.230 | 0.151 | 0.100 | 0.857 |
| Titanium | Ti (wt%) | 0.312 | 0.090 | 0.043 | 0.605 |
| Zinc | Zn (ppm) | 8.645 | 5.040 | 1.087 | 27.040 |