| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.980 | 0.454 | 4.811 | 6.933 |
| Arsenic | As (ppm) | 3.638 | 1.283 | 1.923 | 7.516 |
| Calcium | Ca (wt%) | 1.348 | 0.211 | 0.932 | 1.840 |
| Copper | Cu (ppm) | 3.145 | 2.405 | 1.000 | 11.212 |
| Iron | Fe (wt%) | 5.025 | 0.684 | 3.277 | 6.706 |
| Mercury | Hg (ppm) | 0.065 | 0.006 | 0.051 | 0.080 |
| Magnesium | Mg (wt%) | 0.686 | 0.197 | 0.434 | 1.365 |
| Manganese | Mn (ppm) | 1261.380 | 93.857 | 1102.720 | 1505.000 |
| Sodium | Na (wt%) | 1.526 | 0.203 | 1.115 | 2.331 |
| Phosphorus | P (wt%) | 0.049 | 0.009 | 0.035 | 0.079 |
| Lead | Pb (ppm) | 34.986 | 5.881 | 17.064 | 57.600 |
| Selenium | Se (ppm) | 0.466 | 0.088 | 0.237 | 0.688 |
| Titanium | Ti (wt%) | 0.930 | 0.140 | 0.570 | 1.269 |
| Zinc | Zn (ppm) | 162.002 | 110.402 | 76.126 | 539.065 |