| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.692 | 0.358 | 4.439 | 6.849 |
| Arsenic | As (ppm) | 3.137 | 2.269 | 0.324 | 21.843 |
| Calcium | Ca (wt%) | 1.738 | 0.483 | 0.441 | 2.922 |
| Copper | Cu (ppm) | 11.930 | 3.698 | 5.059 | 32.334 |
| Iron | Fe (wt%) | 2.625 | 0.370 | 1.651 | 3.936 |
| Mercury | Hg (ppm) | 0.035 | 0.006 | 0.013 | 0.062 |
| Magnesium | Mg (wt%) | 0.585 | 0.214 | 0.100 | 1.093 |
| Manganese | Mn (ppm) | 1039.040 | 170.236 | 567.153 | 2028.210 |
| Sodium | Na (wt%) | 1.804 | 0.197 | 1.151 | 2.272 |
| Phosphorus | P (wt%) | 0.067 | 0.013 | 0.029 | 0.142 |
| Lead | Pb (ppm) | 31.914 | 6.942 | 2.349 | 57.757 |
| Selenium | Se (ppm) | 0.126 | 0.036 | 0.100 | 0.457 |
| Titanium | Ti (wt%) | 0.641 | 0.082 | 0.432 | 0.995 |
| Zinc | Zn (ppm) | 51.011 | 20.996 | 22.205 | 189.012 |