| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.807 | 0.561 | 2.465 | 5.452 |
| Arsenic | As (ppm) | 9.844 | 1.738 | 5.140 | 15.410 |
| Calcium | Ca (wt%) | 0.125 | 0.073 | 0.073 | 0.572 |
| Copper | Cu (ppm) | 9.323 | 3.028 | 3.778 | 17.959 |
| Iron | Fe (wt%) | 2.942 | 0.504 | 1.768 | 4.974 |
| Mercury | Hg (ppm) | 0.040 | 0.009 | 0.021 | 0.069 |
| Magnesium | Mg (wt%) | 0.208 | 0.037 | 0.137 | 0.331 |
| Manganese | Mn (ppm) | 1117.340 | 252.357 | 542.566 | 2000.910 |
| Sodium | Na (wt%) | 0.208 | 0.089 | 0.139 | 0.778 |
| Phosphorus | P (wt%) | 0.042 | 0.009 | 0.022 | 0.070 |
| Lead | Pb (ppm) | 25.681 | 5.184 | 17.705 | 46.013 |
| Selenium | Se (ppm) | 0.396 | 0.075 | 0.205 | 0.610 |
| Titanium | Ti (wt%) | 0.244 | 0.029 | 0.196 | 0.334 |
| Zinc | Zn (ppm) | 61.541 | 6.276 | 45.839 | 84.758 |