| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.748 | 0.993 | 0.871 | 4.683 |
| Arsenic | As (ppm) | 14.159 | 3.337 | 5.581 | 28.440 |
| Calcium | Ca (wt%) | 0.433 | 0.241 | 0.050 | 1.202 |
| Copper | Cu (ppm) | 9.457 | 2.490 | 4.143 | 13.973 |
| Iron | Fe (wt%) | 2.634 | 0.508 | 1.164 | 4.061 |
| Mercury | Hg (ppm) | 0.022 | 0.008 | 0.010 | 0.040 |
| Magnesium | Mg (wt%) | 0.206 | 0.062 | 0.081 | 0.337 |
| Manganese | Mn (ppm) | 789.844 | 244.673 | 359.170 | 1276.270 |
| Sodium | Na (wt%) | 0.065 | 0.021 | 0.023 | 0.121 |
| Phosphorus | P (wt%) | 0.050 | 0.014 | 0.018 | 0.080 |
| Lead | Pb (ppm) | 13.571 | 2.993 | 7.161 | 19.905 |
| Selenium | Se (ppm) | 0.740 | 0.319 | 0.112 | 1.700 |
| Titanium | Ti (wt%) | 0.149 | 0.057 | 0.046 | 0.265 |
| Zinc | Zn (ppm) | 77.406 | 23.505 | 30.967 | 164.870 |