| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.128 | 0.360 | 3.944 | 6.086 |
| Arsenic | As (ppm) | 9.789 | 1.130 | 7.251 | 12.921 |
| Calcium | Ca (wt%) | 0.228 | 0.120 | 0.135 | 1.047 |
| Copper | Cu (ppm) | 20.305 | 4.328 | 11.273 | 32.602 |
| Iron | Fe (wt%) | 3.405 | 0.384 | 2.467 | 4.851 |
| Mercury | Hg (ppm) | 0.054 | 0.020 | 0.032 | 0.128 |
| Magnesium | Mg (wt%) | 0.351 | 0.064 | 0.245 | 0.699 |
| Manganese | Mn (ppm) | 982.514 | 313.090 | 588.520 | 2426.060 |
| Sodium | Na (wt%) | 0.260 | 0.104 | 0.089 | 0.560 |
| Phosphorus | P (wt%) | 0.052 | 0.004 | 0.038 | 0.061 |
| Lead | Pb (ppm) | 24.654 | 2.717 | 18.092 | 35.215 |
| Selenium | Se (ppm) | 0.513 | 0.131 | 0.283 | 0.877 |
| Titanium | Ti (wt%) | 0.314 | 0.011 | 0.270 | 0.346 |
| Zinc | Zn (ppm) | 125.860 | 26.777 | 79.559 | 247.764 |