| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.931 | 0.650 | 0.746 | 4.488 |
| Arsenic | As (ppm) | 2.153 | 0.599 | 0.674 | 4.436 |
| Calcium | Ca (wt%) | 0.046 | 0.016 | 0.014 | 0.093 |
| Copper | Cu (ppm) | 4.777 | 1.116 | 2.146 | 8.548 |
| Iron | Fe (wt%) | 0.853 | 0.223 | 0.440 | 1.787 |
| Mercury | Hg (ppm) | 0.027 | 0.010 | 0.011 | 0.065 |
| Magnesium | Mg (wt%) | 0.036 | 0.011 | 0.008 | 0.057 |
| Manganese | Mn (ppm) | 127.620 | 15.239 | 67.403 | 182.185 |
| Sodium | Na (wt%) | 0.030 | 0.012 | 0.008 | 0.079 |
| Phosphorus | P (wt%) | 0.021 | 0.005 | 0.011 | 0.045 |
| Lead | Pb (ppm) | 18.321 | 4.089 | 8.347 | 32.230 |
| Selenium | Se (ppm) | 0.263 | 0.083 | 0.110 | 0.560 |
| Titanium | Ti (wt%) | 0.413 | 0.038 | 0.250 | 0.507 |
| Zinc | Zn (ppm) | 16.631 | 3.894 | 8.877 | 27.193 |