| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.130 | 0.935 | 0.628 | 7.574 |
| Arsenic | As (ppm) | 4.068 | 1.961 | 1.978 | 17.036 |
| Calcium | Ca (wt%) | 0.144 | 0.376 | 0.015 | 3.626 |
| Copper | Cu (ppm) | 5.372 | 2.279 | 2.100 | 21.923 |
| Iron | Fe (wt%) | 1.504 | 0.592 | 0.570 | 6.631 |
| Mercury | Hg (ppm) | 0.027 | 0.013 | 0.010 | 0.078 |
| Magnesium | Mg (wt%) | 0.086 | 0.045 | 0.027 | 0.347 |
| Manganese | Mn (ppm) | 243.132 | 88.561 | 123.168 | 794.670 |
| Sodium | Na (wt%) | 0.038 | 0.020 | 0.010 | 0.129 |
| Phosphorus | P (wt%) | 0.017 | 0.014 | 0.004 | 0.121 |
| Lead | Pb (ppm) | 21.307 | 3.801 | 13.180 | 37.820 |
| Selenium | Se (ppm) | 0.219 | 0.106 | 0.102 | 0.591 |
| Titanium | Ti (wt%) | 0.455 | 0.066 | 0.177 | 0.858 |
| Zinc | Zn (ppm) | 25.892 | 10.702 | 11.743 | 84.819 |