Hokkaido / Name of sample: HV-7
| No. | District | Name of Pyroclastic Deposite | Age |
|---|---|---|---|
| 020 | Makubetsu, Nakagawa-gun, Hokkaido | Sarubetsu vitric tuff | millions |
Particle Size Distribution (wt%).
| -0.038mm | -0.075mm | -0.15mm | -0.3mm | -0.6mm | -1.18mm | -2.36mm | -4.75mm |
|---|---|---|---|---|---|---|---|
| 5.3 | 11.0 | 31.0 | 53.7 | 72.1 | 85.5 | 93.0 | 96.8 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 73.28 | 12.96 | 1.36 | 0.14 | 1.16 | 0.31 | 3.46 | 3.18 | 4.22 | 100.07 | 78.37 |
DTG pattern of separated volcanic glass.
Chemical Compositions of Separated Vocanic Glass (wt%).
| SiO2 | Al2O3 | Fe2O3 | TiO2 | CaO | MgO | Na2O | K2O | Ig.loss | Total |
|---|---|---|---|---|---|---|---|---|---|
| 73.11 | 12.48 | 1.43 | 0.11 | 0.93 | 0.15 | 3.21 | 3.45 | 4.65 | 99.52 |