| Budget Amount *help |
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2010: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2009: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2008: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Research Abstract |
Petrographic study and high-pressure experiments were conducted on eruptive products of large explosive eruptions that had occurred at Usu volcano, Tarumai volcano and Hokkaido-Komagatake volcano during 17th century. Conditions (temperatures, pressures and water contents) of the magma chambers beneath these volcanoes were estimated. Magma mixing process between a new high-temperature magma and a pre-existing low-temperature magma was revealed for each volcano. The time of the magma mixing was also estimated for each pumice eruption.
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