| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2012: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2010: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Research Abstract |
Crystallization and viscosity measurement experiments were performed for magmas at high temperature conditions to quantitatively examine the effects of suspended crystals on viscosities of magmas. Based on the experiments, the equations to describe viscosities of lavas from the Izu-Oshima and the Sakurajima volcanoes were established as functions of temperature and crystal volume fraction, and also the effects of tabular plagioclase crystals on rheological behaviors of magmas were clarified. These results made us to note the problem of using the existing viscosity equation for crystal-rich magma and the importance of time-series development of magma texture through crystallization.
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