| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.063 | 0.703 | 5.331 | 9.166 |
| Arsenic | As (ppm) | 5.191 | 1.846 | 1.473 | 15.969 |
| Calcium | Ca (wt%) | 1.348 | 0.645 | 0.387 | 4.665 |
| Copper | Cu (ppm) | 26.697 | 16.682 | 6.006 | 102.249 |
| Iron | Fe (wt%) | 3.733 | 1.128 | 1.751 | 8.329 |
| Mercury | Hg (ppm) | 0.044 | 0.021 | 0.010 | 0.120 |
| Magnesium | Mg (wt%) | 1.620 | 0.967 | 0.304 | 7.702 |
| Manganese | Mn (ppm) | 619.059 | 186.427 | 313.752 | 1495.980 |
| Sodium | Na (wt%) | 1.511 | 0.268 | 0.433 | 2.082 |
| Phosphorus | P (wt%) | 0.050 | 0.012 | 0.021 | 0.082 |
| Lead | Pb (ppm) | 12.100 | 2.448 | 2.424 | 21.553 |
| Selenium | Se (ppm) | 0.294 | 0.270 | 0.100 | 2.074 |
| Titanium | Ti (wt%) | 0.399 | 0.128 | 0.172 | 0.964 |
| Zinc | Zn (ppm) | 64.902 | 13.823 | 38.020 | 96.854 |