| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.299 | 0.837 | 0.559 | 7.286 |
| Arsenic | As (ppm) | 3.361 | 0.895 | 1.194 | 8.169 |
| Calcium | Ca (wt%) | 0.049 | 0.021 | 0.006 | 0.152 |
| Copper | Cu (ppm) | 5.329 | 1.714 | 2.153 | 15.545 |
| Iron | Fe (wt%) | 1.056 | 0.295 | 0.369 | 2.103 |
| Mercury | Hg (ppm) | 0.027 | 0.010 | 0.010 | 0.082 |
| Magnesium | Mg (wt%) | 0.047 | 0.019 | 0.013 | 0.132 |
| Manganese | Mn (ppm) | 161.361 | 75.718 | 48.460 | 476.426 |
| Sodium | Na (wt%) | 0.010 | 0.005 | 0.003 | 0.033 |
| Phosphorus | P (wt%) | 0.026 | 0.009 | 0.008 | 0.072 |
| Lead | Pb (ppm) | 19.871 | 5.357 | 9.011 | 56.106 |
| Selenium | Se (ppm) | 0.307 | 0.113 | 0.117 | 1.006 |
| Titanium | Ti (wt%) | 0.362 | 0.050 | 0.220 | 0.583 |
| Zinc | Zn (ppm) | 18.676 | 5.694 | 7.681 | 51.492 |