| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.949 | 1.213 | 2.379 | 11.372 |
| Arsenic | As (ppm) | 3.652 | 2.372 | 0.420 | 11.088 |
| Calcium | Ca (wt%) | 1.818 | 0.884 | 0.195 | 4.463 |
| Copper | Cu (ppm) | 12.520 | 3.500 | 1.984 | 23.895 |
| Iron | Fe (wt%) | 3.200 | 0.842 | 0.665 | 6.264 |
| Mercury | Hg (ppm) | 0.028 | 0.008 | 0.010 | 0.057 |
| Magnesium | Mg (wt%) | 0.833 | 0.261 | 0.107 | 2.158 |
| Manganese | Mn (ppm) | 793.791 | 220.355 | 256.124 | 1600.900 |
| Sodium | Na (wt%) | 1.184 | 0.434 | 0.223 | 2.575 |
| Phosphorus | P (wt%) | 0.082 | 0.020 | 0.021 | 0.141 |
| Lead | Pb (ppm) | 35.790 | 10.596 | 11.510 | 91.770 |
| Selenium | Se (ppm) | 0.160 | 0.068 | 0.100 | 0.443 |
| Titanium | Ti (wt%) | 0.472 | 0.207 | 0.117 | 1.281 |
| Zinc | Zn (ppm) | 60.014 | 19.117 | 19.130 | 133.660 |