| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.202 | 0.670 | 0.874 | 4.142 |
| Arsenic | As (ppm) | 6.299 | 2.241 | 2.804 | 23.509 |
| Calcium | Ca (wt%) | 0.308 | 0.165 | 0.096 | 1.563 |
| Copper | Cu (ppm) | 6.400 | 2.115 | 3.100 | 14.049 |
| Iron | Fe (wt%) | 1.334 | 0.402 | 0.444 | 2.680 |
| Mercury | Hg (ppm) | 0.031 | 0.011 | 0.011 | 0.064 |
| Magnesium | Mg (wt%) | 0.109 | 0.034 | 0.042 | 0.245 |
| Manganese | Mn (ppm) | 523.760 | 308.571 | 140.679 | 2938.180 |
| Sodium | Na (wt%) | 0.047 | 0.015 | 0.014 | 0.105 |
| Phosphorus | P (wt%) | 0.020 | 0.008 | 0.006 | 0.048 |
| Lead | Pb (ppm) | 16.336 | 6.582 | 4.798 | 71.534 |
| Selenium | Se (ppm) | 0.224 | 0.093 | 0.101 | 0.503 |
| Titanium | Ti (wt%) | 0.243 | 0.061 | 0.117 | 0.433 |
| Zinc | Zn (ppm) | 44.396 | 18.054 | 15.906 | 117.890 |