| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.351 | 0.559 | 3.754 | 6.678 |
| Arsenic | As (ppm) | 11.593 | 2.234 | 6.789 | 17.019 |
| Calcium | Ca (wt%) | 0.169 | 0.029 | 0.095 | 0.261 |
| Copper | Cu (ppm) | 20.968 | 5.796 | 9.229 | 44.096 |
| Iron | Fe (wt%) | 3.841 | 0.594 | 2.271 | 5.169 |
| Mercury | Hg (ppm) | 0.036 | 0.007 | 0.010 | 0.050 |
| Magnesium | Mg (wt%) | 0.351 | 0.061 | 0.220 | 0.563 |
| Manganese | Mn (ppm) | 1812.050 | 612.930 | 680.255 | 4304.710 |
| Sodium | Na (wt%) | 0.223 | 0.065 | 0.104 | 0.400 |
| Phosphorus | P (wt%) | 0.057 | 0.008 | 0.041 | 0.075 |
| Lead | Pb (ppm) | 25.730 | 3.614 | 17.075 | 35.637 |
| Selenium | Se (ppm) | 0.506 | 0.109 | 0.202 | 0.877 |
| Titanium | Ti (wt%) | 0.327 | 0.018 | 0.261 | 0.385 |
| Zinc | Zn (ppm) | 130.501 | 30.132 | 87.708 | 283.914 |