| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.190 | 0.530 | 1.307 | 5.345 |
| Arsenic | As (ppm) | 9.148 | 2.378 | 2.540 | 17.532 |
| Calcium | Ca (wt%) | 13.549 | 7.238 | 0.737 | 31.674 |
| Copper | Cu (ppm) | 12.498 | 3.541 | 5.692 | 22.597 |
| Iron | Fe (wt%) | 1.665 | 0.296 | 0.741 | 3.149 |
| Mercury | Hg (ppm) | 0.014 | 0.004 | 0.010 | 0.034 |
| Magnesium | Mg (wt%) | 0.366 | 0.056 | 0.152 | 0.489 |
| Manganese | Mn (ppm) | 856.032 | 289.593 | 119.470 | 2088.040 |
| Sodium | Na (wt%) | 0.166 | 0.087 | 0.044 | 0.624 |
| Phosphorus | P (wt%) | 0.045 | 0.010 | 0.023 | 0.072 |
| Lead | Pb (ppm) | 21.721 | 4.587 | 8.522 | 42.036 |
| Selenium | Se (ppm) | 0.422 | 0.204 | 0.102 | 1.360 |
| Titanium | Ti (wt%) | 0.185 | 0.030 | 0.076 | 0.258 |
| Zinc | Zn (ppm) | 46.630 | 10.861 | 19.962 | 93.940 |