| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.710 | 0.294 | 0.285 | 2.197 |
| Arsenic | As (ppm) | 1.464 | 0.439 | 0.476 | 2.690 |
| Calcium | Ca (wt%) | 0.020 | 0.016 | 0.003 | 0.096 |
| Copper | Cu (ppm) | 1.729 | 0.430 | 1.005 | 3.363 |
| Iron | Fe (wt%) | 0.307 | 0.158 | 0.077 | 0.958 |
| Mercury | Hg (ppm) | 0.016 | 0.007 | 0.010 | 0.074 |
| Magnesium | Mg (wt%) | 0.015 | 0.007 | 0.005 | 0.050 |
| Manganese | Mn (ppm) | 55.529 | 35.120 | 14.298 | 242.631 |
| Sodium | Na (wt%) | 0.013 | 0.014 | 0.003 | 0.078 |
| Phosphorus | P (wt%) | 0.008 | 0.002 | 0.003 | 0.016 |
| Lead | Pb (ppm) | 14.678 | 4.133 | 8.008 | 30.735 |
| Selenium | Se (ppm) | 0.153 | 0.026 | 0.102 | 0.274 |
| Titanium | Ti (wt%) | 0.382 | 0.078 | 0.241 | 0.663 |
| Zinc | Zn (ppm) | 9.859 | 8.058 | 1.314 | 48.700 |