| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.982 | 0.396 | 2.149 | 5.010 |
| Arsenic | As (ppm) | 7.957 | 1.944 | 5.712 | 15.324 |
| Calcium | Ca (wt%) | 9.077 | 3.370 | 3.359 | 20.853 |
| Copper | Cu (ppm) | 13.733 | 2.061 | 8.003 | 19.878 |
| Iron | Fe (wt%) | 1.756 | 0.146 | 1.230 | 2.251 |
| Mercury | Hg (ppm) | 0.020 | 0.007 | 0.010 | 0.040 |
| Magnesium | Mg (wt%) | 0.633 | 0.090 | 0.353 | 0.948 |
| Manganese | Mn (ppm) | 355.596 | 44.205 | 249.077 | 486.655 |
| Sodium | Na (wt%) | 0.391 | 0.077 | 0.277 | 0.561 |
| Phosphorus | P (wt%) | 0.056 | 0.011 | 0.032 | 0.098 |
| Lead | Pb (ppm) | 15.505 | 2.728 | 6.006 | 22.509 |
| Selenium | Se (ppm) | 0.228 | 0.082 | 0.102 | 0.491 |
| Titanium | Ti (wt%) | 0.234 | 0.023 | 0.150 | 0.280 |
| Zinc | Zn (ppm) | 81.832 | 20.005 | 47.042 | 181.195 |