| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.694 | 0.521 | 1.549 | 5.547 |
| Arsenic | As (ppm) | 9.492 | 3.108 | 4.187 | 19.177 |
| Calcium | Ca (wt%) | 11.241 | 5.937 | 1.350 | 25.250 |
| Copper | Cu (ppm) | 15.265 | 3.346 | 4.785 | 25.157 |
| Iron | Fe (wt%) | 1.814 | 0.280 | 0.796 | 2.411 |
| Mercury | Hg (ppm) | 0.013 | 0.003 | 0.010 | 0.030 |
| Magnesium | Mg (wt%) | 0.401 | 0.055 | 0.144 | 0.591 |
| Manganese | Mn (ppm) | 608.031 | 244.707 | 177.885 | 1126.490 |
| Sodium | Na (wt%) | 0.174 | 0.092 | 0.056 | 0.415 |
| Phosphorus | P (wt%) | 0.040 | 0.008 | 0.009 | 0.068 |
| Lead | Pb (ppm) | 30.283 | 9.392 | 12.499 | 104.506 |
| Selenium | Se (ppm) | 0.296 | 0.057 | 0.116 | 0.595 |
| Titanium | Ti (wt%) | 0.227 | 0.030 | 0.110 | 0.336 |
| Zinc | Zn (ppm) | 43.865 | 8.254 | 17.956 | 76.162 |