| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.241 | 1.064 | 2.531 | 8.123 |
| Arsenic | As (ppm) | 6.998 | 1.468 | 4.395 | 11.837 |
| Calcium | Ca (wt%) | 0.257 | 0.119 | 0.094 | 0.754 |
| Copper | Cu (ppm) | 12.786 | 4.309 | 7.140 | 31.426 |
| Iron | Fe (wt%) | 1.788 | 0.460 | 1.120 | 3.859 |
| Mercury | Hg (ppm) | 0.031 | 0.007 | 0.013 | 0.053 |
| Magnesium | Mg (wt%) | 0.290 | 0.181 | 0.129 | 1.134 |
| Manganese | Mn (ppm) | 647.253 | 213.181 | 200.533 | 1386.070 |
| Sodium | Na (wt%) | 0.505 | 0.090 | 0.317 | 0.868 |
| Phosphorus | P (wt%) | 0.039 | 0.013 | 0.022 | 0.083 |
| Lead | Pb (ppm) | 19.549 | 6.875 | 13.154 | 59.051 |
| Selenium | Se (ppm) | 0.435 | 0.102 | 0.203 | 0.862 |
| Titanium | Ti (wt%) | 0.312 | 0.025 | 0.237 | 0.403 |
| Zinc | Zn (ppm) | 47.308 | 16.525 | 23.486 | 127.704 |