| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.498 | 1.156 | 3.197 | 8.422 |
| Arsenic | As (ppm) | 2.133 | 0.708 | 0.314 | 4.127 |
| Calcium | Ca (wt%) | 1.223 | 0.981 | 0.154 | 4.084 |
| Copper | Cu (ppm) | 14.629 | 5.104 | 6.043 | 35.965 |
| Iron | Fe (wt%) | 3.524 | 1.084 | 1.721 | 5.769 |
| Mercury | Hg (ppm) | 0.085 | 0.050 | 0.011 | 0.230 |
| Magnesium | Mg (wt%) | 0.384 | 0.182 | 0.127 | 0.797 |
| Manganese | Mn (ppm) | 811.777 | 335.423 | 318.981 | 1537.090 |
| Sodium | Na (wt%) | 0.601 | 0.213 | 0.183 | 1.033 |
| Phosphorus | P (wt%) | 0.040 | 0.006 | 0.015 | 0.058 |
| Lead | Pb (ppm) | 31.387 | 6.301 | 18.002 | 46.941 |
| Selenium | Se (ppm) | 0.156 | 0.053 | 0.100 | 0.380 |
| Titanium | Ti (wt%) | 0.726 | 0.095 | 0.489 | 0.964 |
| Zinc | Zn (ppm) | 46.047 | 9.580 | 31.098 | 81.859 |