| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.033 | 0.837 | 1.637 | 6.911 |
| Arsenic | As (ppm) | 9.589 | 4.026 | 3.278 | 25.229 |
| Calcium | Ca (wt%) | 14.141 | 4.036 | 2.017 | 27.590 |
| Copper | Cu (ppm) | 15.467 | 3.405 | 8.389 | 28.547 |
| Iron | Fe (wt%) | 1.960 | 0.456 | 0.885 | 3.310 |
| Mercury | Hg (ppm) | 0.032 | 0.009 | 0.012 | 0.061 |
| Magnesium | Mg (wt%) | 0.651 | 0.135 | 0.448 | 1.232 |
| Manganese | Mn (ppm) | 588.761 | 244.095 | 249.466 | 1508.900 |
| Sodium | Na (wt%) | 0.122 | 0.052 | 0.051 | 0.390 |
| Phosphorus | P (wt%) | 0.056 | 0.018 | 0.020 | 0.112 |
| Lead | Pb (ppm) | 23.449 | 11.320 | 5.754 | 73.653 |
| Selenium | Se (ppm) | 0.520 | 0.123 | 0.167 | 0.809 |
| Titanium | Ti (wt%) | 0.214 | 0.052 | 0.082 | 0.404 |
| Zinc | Zn (ppm) | 49.494 | 13.864 | 21.450 | 96.735 |