| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.008 | 1.039 | 0.234 | 7.744 |
| Arsenic | As (ppm) | 3.499 | 3.766 | 1.046 | 28.707 |
| Calcium | Ca (wt%) | 0.031 | 0.020 | 0.010 | 0.156 |
| Copper | Cu (ppm) | 2.566 | 1.929 | 1.103 | 15.160 |
| Iron | Fe (wt%) | 0.999 | 0.993 | 0.303 | 7.613 |
| Mercury | Hg (ppm) | 0.015 | 0.009 | 0.010 | 0.072 |
| Magnesium | Mg (wt%) | 0.027 | 0.016 | 0.008 | 0.122 |
| Manganese | Mn (ppm) | 158.559 | 82.675 | 39.892 | 633.822 |
| Sodium | Na (wt%) | 0.010 | 0.005 | 0.003 | 0.036 |
| Phosphorus | P (wt%) | 0.017 | 0.011 | 0.007 | 0.086 |
| Lead | Pb (ppm) | 13.688 | 5.416 | 3.429 | 43.709 |
| Selenium | Se (ppm) | 0.174 | 0.104 | 0.100 | 0.810 |
| Titanium | Ti (wt%) | 0.363 | 0.076 | 0.180 | 0.579 |
| Zinc | Zn (ppm) | 13.340 | 8.626 | 4.210 | 66.419 |