| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.144 | 0.475 | 2.083 | 5.446 |
| Arsenic | As (ppm) | 5.562 | 1.840 | 1.966 | 16.112 |
| Calcium | Ca (wt%) | 1.722 | 1.005 | 0.250 | 5.766 |
| Copper | Cu (ppm) | 9.745 | 1.507 | 6.323 | 14.516 |
| Iron | Fe (wt%) | 1.314 | 0.246 | 0.743 | 2.482 |
| Mercury | Hg (ppm) | 0.015 | 0.004 | 0.010 | 0.029 |
| Magnesium | Mg (wt%) | 0.530 | 0.264 | 0.188 | 2.044 |
| Manganese | Mn (ppm) | 190.967 | 35.274 | 112.678 | 296.741 |
| Sodium | Na (wt%) | 0.380 | 0.039 | 0.224 | 0.482 |
| Phosphorus | P (wt%) | 0.027 | 0.007 | 0.011 | 0.049 |
| Lead | Pb (ppm) | 12.488 | 2.789 | 8.608 | 23.392 |
| Selenium | Se (ppm) | 0.150 | 0.046 | 0.100 | 0.290 |
| Titanium | Ti (wt%) | 0.184 | 0.022 | 0.131 | 0.256 |
| Zinc | Zn (ppm) | 33.499 | 7.900 | 16.174 | 62.421 |