| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.318 | 0.023 | 4.282 | 4.346 |
| Arsenic | As (ppm) | 1.335 | 0.144 | 1.158 | 1.560 |
| Calcium | Ca (wt%) | 0.914 | 0.059 | 0.797 | 0.959 |
| Copper | Cu (ppm) | 6.193 | 1.342 | 5.245 | 8.843 |
| Iron | Fe (wt%) | 1.284 | 0.051 | 1.213 | 1.354 |
| Mercury | Hg (ppm) | 0.044 | 0.004 | 0.040 | 0.050 |
| Magnesium | Mg (wt%) | 0.226 | 0.011 | 0.208 | 0.242 |
| Manganese | Mn (ppm) | 498.754 | 56.950 | 386.284 | 536.228 |
| Sodium | Na (wt%) | 1.394 | 0.058 | 1.278 | 1.432 |
| Phosphorus | P (wt%) | 0.036 | 0.004 | 0.032 | 0.044 |
| Lead | Pb (ppm) | 37.320 | 11.249 | 30.073 | 59.664 |
| Selenium | Se (ppm) | 0.204 | 0.049 | 0.164 | 0.298 |
| Titanium | Ti (wt%) | 0.447 | 0.034 | 0.382 | 0.475 |
| Zinc | Zn (ppm) | 31.134 | 7.080 | 24.419 | 44.123 |