| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.528 | 0.458 | 0.522 | 4.315 |
| Arsenic | As (ppm) | 3.162 | 0.753 | 1.521 | 6.839 |
| Calcium | Ca (wt%) | 0.038 | 0.028 | 0.008 | 0.314 |
| Copper | Cu (ppm) | 5.055 | 0.977 | 2.937 | 10.331 |
| Iron | Fe (wt%) | 1.229 | 0.271 | 0.732 | 2.384 |
| Mercury | Hg (ppm) | 0.022 | 0.011 | 0.011 | 0.070 |
| Magnesium | Mg (wt%) | 0.049 | 0.015 | 0.018 | 0.121 |
| Manganese | Mn (ppm) | 252.727 | 73.232 | 122.974 | 706.111 |
| Sodium | Na (wt%) | 0.027 | 0.008 | 0.008 | 0.064 |
| Phosphorus | P (wt%) | 0.010 | 0.003 | 0.003 | 0.024 |
| Lead | Pb (ppm) | 21.814 | 3.770 | 14.114 | 50.810 |
| Selenium | Se (ppm) | 0.168 | 0.062 | 0.100 | 0.390 |
| Titanium | Ti (wt%) | 0.451 | 0.055 | 0.298 | 0.680 |
| Zinc | Zn (ppm) | 27.577 | 9.289 | 14.965 | 85.635 |