Kyushu / Name of sample: KP-3
| No. | District | Name of Pyroclastic Deposite | Age |
|---|---|---|---|
| 039 | Izumi, Kagoshima Pref. | Pre-Aira pumice flow | 16,000-23,000 |
Particle Size Distribution (wt%).
| -0.038mm | -0.075mm | -0.15mm | -0.3mm | -0.6mm | -1.18mm | -2.36mm | -4.75mm |
|---|---|---|---|---|---|---|---|
| 12.0 | 22.2 | 44.2 | 66.1 | 79.5 | 90.3 | 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 71.42 | 14.16 | 2.38 | 0.26 | 2.24 | 0.58 | 3.72 | 2.77 | 2.55 | 100.08 | 70.27 |
 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 |
|---|---|---|---|---|---|---|---|---|---|
| 74.60 | 12.39 | 1.57 | 0.15 | 1.14 | 0.32 | 3.42 | 3.45 | 2.95 | 99.99 |