| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.738 | 0.215 | 0.294 | 1.243 |
| Arsenic | As (ppm) | 1.698 | 0.313 | 1.088 | 2.472 |
| Calcium | Ca (wt%) | 0.015 | 0.007 | 0.004 | 0.028 |
| Copper | Cu (ppm) | 1.625 | 0.445 | 1.070 | 2.936 |
| Iron | Fe (wt%) | 0.339 | 0.207 | 0.122 | 1.288 |
| Mercury | Hg (ppm) | 0.012 | 0.002 | 0.010 | 0.020 |
| Magnesium | Mg (wt%) | 0.014 | 0.004 | 0.004 | 0.023 |
| Manganese | Mn (ppm) | 41.298 | 17.294 | 13.846 | 94.574 |
| Sodium | Na (wt%) | 0.003 | 0.000 | 0.003 | 0.004 |
| Phosphorus | P (wt%) | 0.010 | 0.002 | 0.004 | 0.015 |
| Lead | Pb (ppm) | 11.003 | 2.617 | 3.623 | 16.213 |
| Selenium | Se (ppm) | 0.164 | 0.042 | 0.107 | 0.293 |
| Titanium | Ti (wt%) | 0.323 | 0.066 | 0.131 | 0.457 |
| Zinc | Zn (ppm) | 6.925 | 1.551 | 3.739 | 11.109 |