| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.141 | 0.404 | 4.533 | 5.995 |
| Arsenic | As (ppm) | 4.099 | 1.623 | 2.300 | 8.354 |
| Calcium | Ca (wt%) | 1.739 | 0.129 | 1.415 | 2.004 |
| Copper | Cu (ppm) | 10.544 | 4.000 | 1.574 | 24.507 |
| Iron | Fe (wt%) | 5.616 | 1.168 | 3.452 | 8.493 |
| Mercury | Hg (ppm) | 0.060 | 0.012 | 0.032 | 0.088 |
| Magnesium | Mg (wt%) | 1.209 | 0.195 | 0.863 | 1.667 |
| Manganese | Mn (ppm) | 1251.360 | 130.225 | 937.434 | 1628.140 |
| Sodium | Na (wt%) | 1.213 | 0.119 | 0.984 | 1.493 |
| Phosphorus | P (wt%) | 0.053 | 0.003 | 0.044 | 0.060 |
| Lead | Pb (ppm) | 31.540 | 3.953 | 26.143 | 45.225 |
| Selenium | Se (ppm) | 0.317 | 0.050 | 0.209 | 0.440 |
| Titanium | Ti (wt%) | 0.824 | 0.154 | 0.501 | 1.014 |
| Zinc | Zn (ppm) | 188.144 | 127.422 | 94.129 | 548.013 |