| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.812 | 0.452 | 1.021 | 2.765 |
| Arsenic | As (ppm) | 4.048 | 1.708 | 1.107 | 10.288 |
| Calcium | Ca (wt%) | 0.083 | 0.035 | 0.043 | 0.263 |
| Copper | Cu (ppm) | 3.620 | 0.831 | 1.006 | 5.593 |
| Iron | Fe (wt%) | 1.352 | 0.421 | 0.592 | 2.623 |
| Mercury | Hg (ppm) | 0.016 | 0.005 | 0.010 | 0.030 |
| Magnesium | Mg (wt%) | 0.100 | 0.034 | 0.050 | 0.218 |
| Manganese | Mn (ppm) | 390.183 | 222.880 | 115.780 | 1299.690 |
| Sodium | Na (wt%) | 0.141 | 0.024 | 0.076 | 0.210 |
| Phosphorus | P (wt%) | 0.019 | 0.006 | 0.006 | 0.041 |
| Lead | Pb (ppm) | 15.478 | 3.760 | 9.833 | 28.541 |
| Selenium | Se (ppm) | 0.218 | 0.089 | 0.100 | 0.520 |
| Titanium | Ti (wt%) | 0.400 | 0.087 | 0.167 | 0.774 |
| Zinc | Zn (ppm) | 23.407 | 6.837 | 13.028 | 41.562 |