| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.713 | 0.225 | 0.217 | 1.635 |
| Arsenic | As (ppm) | 1.290 | 0.371 | 0.720 | 2.974 |
| Calcium | Ca (wt%) | 0.066 | 0.065 | 0.012 | 0.477 |
| Copper | Cu (ppm) | 2.509 | 0.996 | 1.101 | 7.175 |
| Iron | Fe (wt%) | 0.378 | 0.105 | 0.159 | 0.907 |
| Mercury | Hg (ppm) | 0.013 | 0.004 | 0.010 | 0.036 |
| Magnesium | Mg (wt%) | 0.035 | 0.013 | 0.011 | 0.080 |
| Manganese | Mn (ppm) | 106.298 | 22.983 | 52.313 | 171.461 |
| Sodium | Na (wt%) | 0.029 | 0.013 | 0.007 | 0.088 |
| Phosphorus | P (wt%) | 0.006 | 0.002 | 0.003 | 0.018 |
| Lead | Pb (ppm) | 12.042 | 4.427 | 4.759 | 40.813 |
| Selenium | Se (ppm) | 0.123 | 0.026 | 0.100 | 0.285 |
| Titanium | Ti (wt%) | 0.243 | 0.045 | 0.088 | 0.408 |
| Zinc | Zn (ppm) | 10.221 | 5.462 | 4.451 | 45.890 |