| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.524 | 0.765 | 0.271 | 3.270 |
| Arsenic | As (ppm) | 4.437 | 1.921 | 0.941 | 11.642 |
| Calcium | Ca (wt%) | 0.115 | 0.085 | 0.022 | 0.365 |
| Copper | Cu (ppm) | 3.832 | 1.279 | 1.004 | 6.900 |
| Iron | Fe (wt%) | 0.809 | 0.545 | 0.165 | 2.608 |
| Mercury | Hg (ppm) | 0.016 | 0.006 | 0.010 | 0.039 |
| Magnesium | Mg (wt%) | 0.076 | 0.045 | 0.011 | 0.190 |
| Manganese | Mn (ppm) | 263.536 | 228.602 | 28.528 | 882.112 |
| Sodium | Na (wt%) | 0.056 | 0.023 | 0.011 | 0.113 |
| Phosphorus | P (wt%) | 0.010 | 0.004 | 0.005 | 0.025 |
| Lead | Pb (ppm) | 12.671 | 4.547 | 2.056 | 26.871 |
| Selenium | Se (ppm) | 0.281 | 0.108 | 0.102 | 0.712 |
| Titanium | Ti (wt%) | 0.258 | 0.043 | 0.097 | 0.341 |
| Zinc | Zn (ppm) | 13.123 | 6.998 | 3.221 | 30.920 |