| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.932 | 0.483 | 0.133 | 2.505 |
| Arsenic | As (ppm) | 2.111 | 0.776 | 0.693 | 5.505 |
| Calcium | Ca (wt%) | 0.041 | 0.036 | 0.010 | 0.324 |
| Copper | Cu (ppm) | 2.395 | 0.848 | 1.005 | 5.900 |
| Iron | Fe (wt%) | 0.594 | 0.223 | 0.147 | 1.592 |
| Mercury | Hg (ppm) | 0.014 | 0.007 | 0.010 | 0.080 |
| Magnesium | Mg (wt%) | 0.020 | 0.013 | 0.003 | 0.119 |
| Manganese | Mn (ppm) | 104.781 | 39.793 | 27.627 | 243.175 |
| Sodium | Na (wt%) | 0.003 | 0.001 | 0.003 | 0.006 |
| Phosphorus | P (wt%) | 0.017 | 0.007 | 0.006 | 0.068 |
| Lead | Pb (ppm) | 11.338 | 2.853 | 2.428 | 19.622 |
| Selenium | Se (ppm) | 0.130 | 0.025 | 0.100 | 0.235 |
| Titanium | Ti (wt%) | 0.306 | 0.090 | 0.079 | 0.560 |
| Zinc | Zn (ppm) | 12.109 | 3.700 | 4.590 | 25.604 |