| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.241 | 0.470 | 4.033 | 7.000 |
| Arsenic | As (ppm) | 6.566 | 3.902 | 1.370 | 37.275 |
| Calcium | Ca (wt%) | 0.803 | 0.168 | 0.477 | 1.650 |
| Copper | Cu (ppm) | 8.065 | 2.695 | 3.036 | 20.133 |
| Iron | Fe (wt%) | 1.961 | 0.340 | 1.140 | 3.265 |
| Mercury | Hg (ppm) | 0.027 | 0.011 | 0.010 | 0.096 |
| Magnesium | Mg (wt%) | 0.445 | 0.075 | 0.269 | 0.959 |
| Manganese | Mn (ppm) | 519.663 | 179.198 | 197.831 | 1331.190 |
| Sodium | Na (wt%) | 1.488 | 0.226 | 1.024 | 2.465 |
| Phosphorus | P (wt%) | 0.043 | 0.014 | 0.006 | 0.110 |
| Lead | Pb (ppm) | 30.443 | 4.817 | 20.090 | 60.410 |
| Selenium | Se (ppm) | 0.215 | 0.120 | 0.100 | 1.045 |
| Titanium | Ti (wt%) | 0.431 | 0.100 | 0.251 | 0.830 |
| Zinc | Zn (ppm) | 43.574 | 10.467 | 17.125 | 79.990 |