| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.625 | 0.446 | 2.495 | 5.149 |
| Arsenic | As (ppm) | 4.082 | 0.534 | 2.504 | 5.699 |
| Calcium | Ca (wt%) | 0.515 | 0.236 | 0.209 | 1.126 |
| Copper | Cu (ppm) | 11.131 | 1.583 | 8.111 | 15.966 |
| Iron | Fe (wt%) | 1.853 | 0.246 | 1.082 | 2.561 |
| Mercury | Hg (ppm) | 0.012 | 0.002 | 0.010 | 0.020 |
| Magnesium | Mg (wt%) | 0.376 | 0.104 | 0.202 | 0.722 |
| Manganese | Mn (ppm) | 365.249 | 51.795 | 266.680 | 579.185 |
| Sodium | Na (wt%) | 0.488 | 0.129 | 0.282 | 0.913 |
| Phosphorus | P (wt%) | 0.027 | 0.004 | 0.020 | 0.038 |
| Lead | Pb (ppm) | 17.775 | 4.736 | 13.077 | 51.205 |
| Selenium | Se (ppm) | 0.125 | 0.028 | 0.100 | 0.199 |
| Titanium | Ti (wt%) | 0.220 | 0.023 | 0.166 | 0.302 |
| Zinc | Zn (ppm) | 36.493 | 6.492 | 21.030 | 53.675 |