Honshu / Name of sample: MT-3
| No. | District | Name of Pyroclastic Deposite | Age |
|---|---|---|---|
| 023 | Kazuno, Aomori Pref. | Towada pumice flow | 10,000-33,000 |
Particle Size Distribution (wt%).
| -0.038mm | -0.075mm | -0.15mm | -0.3mm | -0.6mm | -1.18mm | -2.36mm | -4.75mm |
|---|---|---|---|---|---|---|---|
| 36.1 | 48.4 | 60.7 | 71.2 | 84.5 | 92.4 | 94.9 | 97.4 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 67.72 | 15.23 | 3.55 | 0.52 | 3.72 | 1.19 | 3.87 | 1.08 | 3.07 | 99.95 | 63.83 |
DTG pattern of separated volcanic glass.
Chemical Compositions and Content of Volcanic Glass (wt%).
| SiO2 | Al2O3 | Fe2O3 | TiO2 | CaO | MgO | Na2O | K2O | Ig.loss | Total |
|---|---|---|---|---|---|---|---|---|---|
| 72.45 | 13.10 | 2.24 | 0.35 | 2.20 | 0.66 | 3.81 | 1.19 | 3.60 | 99.60 |