Honshu / Name of sample: MM-1
| No. | District | Name of Pyroclastic Deposite | Age |
|---|---|---|---|
| 027 | Niijima, Tokyo | Mukohyama pumice flow | ? |
Particle Size Distribution (wt%).
| -0.038mm | -0.075mm | -0.15mm | -0.3mm | -0.6mm | -1.18mm | -2.36mm | -4.75mm |
|---|---|---|---|---|---|---|---|
| 12.1 | 21.2 | 37.8 | 59.0 | 77.2 | 88.4 | 96.6 | 99.1 |
X-ray powder diffraction pattern (F: feldspar, Q: quartz).
Chemical Compositions and Content of Volcanic Glass (wt%).
| SiO2 | Al2O3 | Fe2O3 | TiO2 | CaO | MgO | Na2O | K2O | Ig.loss | Total | Content of Volcanic Glass |
|---|---|---|---|---|---|---|---|---|---|---|
| 73.37 | 13.27 | 1.08 | 0.05 | 0.56 | 0.08 | 2.79 | 4.72 | 3.98 | 99.90 | 68.92 |
DTG pattern of separated volcanic glass.
Chemical Compositions of Separated Vocanic Glass (wt%).
| SiO2 | Al2O3 | Fe2O3 | TiO2 | CaO | MgO | Na2O | K2O | Ig.loss | Total |
|---|---|---|---|---|---|---|---|---|---|
| 73.75 | 13.22 | 1.06 | 0.04 | 0.53 | 0.06 | 2.77 | 4.73 | 3.87 | 100.03 |