| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.732 | 1.161 | 1.241 | 4.984 |
| Arsenic | As (ppm) | 3.911 | 1.570 | 1.928 | 7.082 |
| Calcium | Ca (wt%) | 0.799 | 0.363 | 0.124 | 1.914 |
| Copper | Cu (ppm) | 11.637 | 5.306 | 5.116 | 22.849 |
| Iron | Fe (wt%) | 1.231 | 0.625 | 0.481 | 2.230 |
| Mercury | Hg (ppm) | 0.014 | 0.004 | 0.010 | 0.020 |
| Magnesium | Mg (wt%) | 0.204 | 0.096 | 0.071 | 0.410 |
| Manganese | Mn (ppm) | 309.362 | 200.473 | 111.754 | 812.250 |
| Sodium | Na (wt%) | 0.168 | 0.047 | 0.074 | 0.261 |
| Phosphorus | P (wt%) | 0.015 | 0.005 | 0.008 | 0.025 |
| Lead | Pb (ppm) | 11.020 | 2.054 | 8.056 | 15.121 |
| Selenium | Se (ppm) | 0.124 | 0.025 | 0.100 | 0.199 |
| Titanium | Ti (wt%) | 0.188 | 0.040 | 0.119 | 0.269 |
| Zinc | Zn (ppm) | 36.687 | 11.732 | 15.501 | 55.100 |