| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.740 | 0.403 | 3.812 | 6.030 |
| Arsenic | As (ppm) | 4.975 | 1.959 | 3.085 | 15.390 |
| Calcium | Ca (wt%) | 3.359 | 1.767 | 1.089 | 11.092 |
| Copper | Cu (ppm) | 9.896 | 1.242 | 4.027 | 13.661 |
| Iron | Fe (wt%) | 1.804 | 0.134 | 1.342 | 2.297 |
| Mercury | Hg (ppm) | 0.013 | 0.004 | 0.010 | 0.035 |
| Magnesium | Mg (wt%) | 0.635 | 0.143 | 0.298 | 1.085 |
| Manganese | Mn (ppm) | 337.224 | 29.991 | 239.017 | 478.733 |
| Sodium | Na (wt%) | 0.879 | 0.291 | 0.400 | 1.457 |
| Phosphorus | P (wt%) | 0.043 | 0.013 | 0.016 | 0.086 |
| Lead | Pb (ppm) | 19.571 | 4.290 | 11.236 | 34.152 |
| Selenium | Se (ppm) | 0.161 | 0.047 | 0.100 | 0.297 |
| Titanium | Ti (wt%) | 0.312 | 0.048 | 0.220 | 0.541 |
| Zinc | Zn (ppm) | 48.758 | 6.573 | 32.914 | 67.306 |