| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.743 | 0.274 | 5.015 | 6.271 |
| Arsenic | As (ppm) | 8.084 | 0.501 | 6.928 | 9.642 |
| Calcium | Ca (wt%) | 0.690 | 0.206 | 0.255 | 1.124 |
| Copper | Cu (ppm) | 9.918 | 1.598 | 7.032 | 15.690 |
| Iron | Fe (wt%) | 3.513 | 0.130 | 3.242 | 3.755 |
| Mercury | Hg (ppm) | 0.049 | 0.005 | 0.040 | 0.059 |
| Magnesium | Mg (wt%) | 0.693 | 0.058 | 0.545 | 0.804 |
| Manganese | Mn (ppm) | 754.990 | 75.968 | 639.444 | 1083.740 |
| Sodium | Na (wt%) | 0.668 | 0.044 | 0.559 | 0.773 |
| Phosphorus | P (wt%) | 0.054 | 0.003 | 0.050 | 0.063 |
| Lead | Pb (ppm) | 27.664 | 2.522 | 23.950 | 34.769 |
| Selenium | Se (ppm) | 0.229 | 0.042 | 0.119 | 0.301 |
| Titanium | Ti (wt%) | 0.366 | 0.036 | 0.284 | 0.425 |
| Zinc | Zn (ppm) | 84.312 | 4.520 | 73.159 | 97.425 |