| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.636 | 0.766 | 3.137 | 10.400 |
| Arsenic | As (ppm) | 4.586 | 5.375 | 0.322 | 60.146 |
| Calcium | Ca (wt%) | 2.006 | 0.641 | 0.644 | 5.728 |
| Copper | Cu (ppm) | 9.161 | 8.233 | 1.057 | 75.006 |
| Iron | Fe (wt%) | 3.128 | 1.137 | 0.740 | 9.339 |
| Mercury | Hg (ppm) | 0.067 | 0.085 | 0.010 | 1.155 |
| Magnesium | Mg (wt%) | 0.933 | 0.413 | 0.212 | 3.155 |
| Manganese | Mn (ppm) | 634.697 | 237.636 | 167.402 | 2015.770 |
| Sodium | Na (wt%) | 2.040 | 0.341 | 0.419 | 3.851 |
| Phosphorus | P (wt%) | 0.089 | 0.019 | 0.033 | 0.183 |
| Lead | Pb (ppm) | 22.759 | 5.925 | 5.450 | 53.849 |
| Selenium | Se (ppm) | 0.242 | 0.249 | 0.100 | 2.477 |
| Titanium | Ti (wt%) | 0.484 | 0.205 | 0.113 | 1.696 |
| Zinc | Zn (ppm) | 71.314 | 30.690 | 17.030 | 295.703 |