| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.498 | 0.262 | 0.125 | 2.029 |
| Arsenic | As (ppm) | 1.490 | 0.481 | 0.474 | 4.025 |
| Calcium | Ca (wt%) | 0.017 | 0.004 | 0.006 | 0.031 |
| Copper | Cu (ppm) | 1.898 | 0.731 | 1.001 | 5.744 |
| Iron | Fe (wt%) | 0.366 | 0.147 | 0.072 | 1.070 |
| Mercury | Hg (ppm) | 0.011 | 0.002 | 0.010 | 0.028 |
| Magnesium | Mg (wt%) | 0.012 | 0.005 | 0.003 | 0.029 |
| Manganese | Mn (ppm) | 94.144 | 64.737 | 12.309 | 526.105 |
| Sodium | Na (wt%) | 0.004 | 0.003 | 0.003 | 0.020 |
| Phosphorus | P (wt%) | 0.009 | 0.003 | 0.003 | 0.034 |
| Lead | Pb (ppm) | 9.185 | 2.565 | 2.323 | 19.157 |
| Selenium | Se (ppm) | 0.128 | 0.032 | 0.100 | 0.298 |
| Titanium | Ti (wt%) | 0.267 | 0.066 | 0.055 | 0.541 |
| Zinc | Zn (ppm) | 9.075 | 2.415 | 3.438 | 17.810 |