| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.038 | 0.565 | 0.250 | 2.303 |
| Arsenic | As (ppm) | 1.918 | 0.660 | 0.808 | 4.829 |
| Calcium | Ca (wt%) | 0.121 | 0.147 | 0.007 | 0.734 |
| Copper | Cu (ppm) | 2.669 | 0.782 | 1.168 | 5.674 |
| Iron | Fe (wt%) | 0.577 | 0.404 | 0.207 | 2.716 |
| Mercury | Hg (ppm) | 0.035 | 0.014 | 0.014 | 0.112 |
| Magnesium | Mg (wt%) | 0.039 | 0.028 | 0.007 | 0.103 |
| Manganese | Mn (ppm) | 164.095 | 181.660 | 40.624 | 1228.660 |
| Sodium | Na (wt%) | 0.088 | 0.074 | 0.004 | 0.245 |
| Phosphorus | P (wt%) | 0.017 | 0.006 | 0.003 | 0.033 |
| Lead | Pb (ppm) | 21.657 | 5.997 | 12.303 | 51.394 |
| Selenium | Se (ppm) | 0.158 | 0.040 | 0.103 | 0.351 |
| Titanium | Ti (wt%) | 0.488 | 0.133 | 0.235 | 1.118 |
| Zinc | Zn (ppm) | 12.461 | 3.841 | 3.624 | 28.545 |