| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.115 | 0.510 | 0.924 | 3.565 |
| Arsenic | As (ppm) | 4.089 | 1.180 | 1.706 | 7.337 |
| Calcium | Ca (wt%) | 0.155 | 0.083 | 0.044 | 0.788 |
| Copper | Cu (ppm) | 3.601 | 1.434 | 1.001 | 8.154 |
| Iron | Fe (wt%) | 1.244 | 0.353 | 0.658 | 2.352 |
| Mercury | Hg (ppm) | 0.018 | 0.008 | 0.010 | 0.050 |
| Magnesium | Mg (wt%) | 0.110 | 0.036 | 0.050 | 0.333 |
| Manganese | Mn (ppm) | 336.393 | 312.260 | 66.293 | 1699.650 |
| Sodium | Na (wt%) | 0.174 | 0.094 | 0.034 | 0.494 |
| Phosphorus | P (wt%) | 0.014 | 0.005 | 0.006 | 0.030 |
| Lead | Pb (ppm) | 15.249 | 2.090 | 7.619 | 24.627 |
| Selenium | Se (ppm) | 0.240 | 0.098 | 0.105 | 0.595 |
| Titanium | Ti (wt%) | 0.308 | 0.039 | 0.229 | 0.455 |
| Zinc | Zn (ppm) | 22.489 | 5.912 | 11.369 | 36.945 |