| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.920 | 0.656 | 2.245 | 6.535 |
| Arsenic | As (ppm) | 8.241 | 1.680 | 3.092 | 14.701 |
| Calcium | Ca (wt%) | 0.110 | 0.046 | 0.035 | 0.416 |
| Copper | Cu (ppm) | 10.100 | 2.208 | 6.056 | 19.550 |
| Iron | Fe (wt%) | 2.598 | 0.358 | 1.507 | 3.482 |
| Mercury | Hg (ppm) | 0.267 | 0.549 | 0.021 | 4.220 |
| Magnesium | Mg (wt%) | 0.260 | 0.064 | 0.127 | 0.655 |
| Manganese | Mn (ppm) | 713.781 | 222.694 | 143.079 | 1586.820 |
| Sodium | Na (wt%) | 0.176 | 0.047 | 0.075 | 0.443 |
| Phosphorus | P (wt%) | 0.041 | 0.006 | 0.013 | 0.068 |
| Lead | Pb (ppm) | 23.212 | 4.185 | 8.780 | 42.665 |
| Selenium | Se (ppm) | 0.391 | 0.125 | 0.121 | 0.936 |
| Titanium | Ti (wt%) | 0.259 | 0.033 | 0.156 | 0.385 |
| Zinc | Zn (ppm) | 61.004 | 7.695 | 32.241 | 81.670 |