| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.779 | 0.883 | 0.878 | 5.974 |
| Arsenic | As (ppm) | 5.089 | 1.892 | 1.805 | 12.001 |
| Calcium | Ca (wt%) | 22.244 | 4.189 | 9.800 | 31.046 |
| Copper | Cu (ppm) | 16.397 | 3.890 | 11.172 | 36.700 |
| Iron | Fe (wt%) | 1.236 | 0.414 | 0.439 | 2.773 |
| Mercury | Hg (ppm) | 0.015 | 0.005 | 0.010 | 0.040 |
| Magnesium | Mg (wt%) | 0.935 | 0.728 | 0.352 | 6.221 |
| Manganese | Mn (ppm) | 308.776 | 75.120 | 159.392 | 526.714 |
| Sodium | Na (wt%) | 0.076 | 0.023 | 0.032 | 0.238 |
| Phosphorus | P (wt%) | 0.025 | 0.005 | 0.015 | 0.046 |
| Lead | Pb (ppm) | 19.733 | 5.788 | 3.499 | 36.091 |
| Selenium | Se (ppm) | 0.510 | 0.135 | 0.188 | 0.865 |
| Titanium | Ti (wt%) | 0.150 | 0.049 | 0.055 | 0.328 |
| Zinc | Zn (ppm) | 30.448 | 8.517 | 14.667 | 55.663 |