Kyushu / Name of sample: KA-1
| No. | District | Name of Pyroclastic Deposite | Age |
|---|---|---|---|
| 030 | Tagawa, Fukuoka Pref. | Aso pumice flow | 20,000-36,000 |
Particle Size Distribution (wt%).
| -0.038mm | -0.075mm | -0.15mm | -0.3mm | -0.6mm | -1.18mm | -2.36mm | -4.75mm |
|---|---|---|---|---|---|---|---|
| 15.9 | 31.7 | 64.1 | 81.0 | 89.1 | 95.2 | 97.7 | 99.1 |
X-ray powder diffraction pattern (F: feldspar).
Chemical Compositions and Content of Volcanic Glass (wt%).
| SiO2 | Al2O3 | Fe2O3 | TiO2 | CaO | MgO | Na2O | K2O | Ig.loss | Total | Content of Volcanic Glass |
|---|---|---|---|---|---|---|---|---|---|---|
| 64.24 | 17.21 | 3.16 | 0.57 | 1.86 | 0.95 | 3.76 | 3.51 | 4.61 | 99.87 | 75.33 |
 XRD pattern of separated volcanic glass.  DTG pattern of separated volcanic glass. |
Chemical Compositions of Separated Vocanic Glass (wt%).
| SiO2 | Al2O3 | Fe2O3 | TiO2 | CaO | MgO | Na2O | K2O | Ig.loss | Total |
|---|---|---|---|---|---|---|---|---|---|
| 67.73 | 15.94 | 1.94 | 0.45 | 1.13 | 0.58 | 3.85 | 4.00 | 4.21 | 99.83 |