| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.003 | 0.552 | 0.232 | 4.438 |
| Arsenic | As (ppm) | 1.890 | 0.770 | 0.823 | 6.497 |
| Calcium | Ca (wt%) | 0.039 | 0.014 | 0.012 | 0.106 |
| Copper | Cu (ppm) | 3.123 | 1.737 | 1.000 | 15.822 |
| Iron | Fe (wt%) | 0.511 | 0.258 | 0.120 | 2.241 |
| Mercury | Hg (ppm) | 0.023 | 0.030 | 0.010 | 0.278 |
| Magnesium | Mg (wt%) | 0.018 | 0.009 | 0.003 | 0.067 |
| Manganese | Mn (ppm) | 130.361 | 52.449 | 31.760 | 349.919 |
| Sodium | Na (wt%) | 0.004 | 0.001 | 0.003 | 0.010 |
| Phosphorus | P (wt%) | 0.013 | 0.006 | 0.005 | 0.051 |
| Lead | Pb (ppm) | 8.946 | 3.782 | 2.143 | 33.774 |
| Selenium | Se (ppm) | 0.135 | 0.049 | 0.100 | 0.428 |
| Titanium | Ti (wt%) | 0.189 | 0.064 | 0.058 | 0.546 |
| Zinc | Zn (ppm) | 12.355 | 5.298 | 4.202 | 52.390 |