| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.775 | 1.100 | 1.732 | 5.903 |
| Arsenic | As (ppm) | 6.215 | 3.716 | 2.680 | 22.563 |
| Calcium | Ca (wt%) | 0.590 | 0.250 | 0.076 | 1.446 |
| Copper | Cu (ppm) | 13.155 | 3.751 | 6.241 | 23.801 |
| Iron | Fe (wt%) | 1.570 | 0.392 | 0.896 | 2.626 |
| Mercury | Hg (ppm) | 0.053 | 0.007 | 0.031 | 0.070 |
| Magnesium | Mg (wt%) | 0.368 | 0.179 | 0.074 | 0.771 |
| Manganese | Mn (ppm) | 431.743 | 132.216 | 224.779 | 965.913 |
| Sodium | Na (wt%) | 0.560 | 0.170 | 0.161 | 1.006 |
| Phosphorus | P (wt%) | 0.042 | 0.015 | 0.019 | 0.084 |
| Lead | Pb (ppm) | 24.487 | 3.827 | 15.896 | 35.342 |
| Selenium | Se (ppm) | 0.295 | 0.118 | 0.100 | 0.684 |
| Titanium | Ti (wt%) | 0.286 | 0.008 | 0.258 | 0.305 |
| Zinc | Zn (ppm) | 71.603 | 18.733 | 30.933 | 121.497 |