| Project/Area Number |
06504002
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
Geology
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
TAKAHASHI Eiichi Tokyo Inst of Tech., Earth & Planet Sci.Prof., 理学部, 教授 (40144779)
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| Co-Investigator(Kenkyū-buntansha) |
仲井 伯享 神戸製鋼所, 産業機械本部, IPグループ主査
NAKAMURA M Tokyo Inst of Tech., Earth & Planet Sci.Asoc., 理学部, 助手 (70260528)
KAWAMURA Katsuyuki Tokyo Inst of Tech., Earth & Planet Sci.Prof., 理学部, 教授 (00126038)
NAKAI H Kobe Steel Inc.IP group Chief Engineer
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| Project Period (FY) |
1994 – 1995
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| Project Status |
Completed (Fiscal Year 1995)
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| Budget Amount *help |
¥52,800,000 (Direct Cost: ¥52,800,000)
Fiscal Year 1995: ¥10,700,000 (Direct Cost: ¥10,700,000)
Fiscal Year 1994: ¥42,100,000 (Direct Cost: ¥42,100,000)
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| Keywords | Earth Science / Crust / rock / mineral / high-pressure experiment / Hot Isostatic Press (HIP) / gas medium / 内熱式ガス圧発生装置 / アルゴンガス / 相平衡実験 / 火山 / マグマ / シリケイトメルト / 下部地殻 |
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| Research Abstract |
Various geological phenomena (e.g., volcanic activity, metamorphism, earthquakes, etc) take place under crustal environment beneath Japan (a typical island arc). In order to study these geologic phenomena, we developed an internally heated gass apparatus SMC-5000 which are capable to generate pressure for up to 5000 bars and temperature to 1600 degree centigrade. Due to the very severe control under the High-pressure Gas Regulation Law, we oblighed to lower the maximum pressure from 8000 to 5000 and had to abandone the automatic pressure regulating valve. Otherwise the SMC-5000 was built with excellent pressure regulating system, rapid quenching device, precise temperature controlling capability and long durability for holding very long (up to a week long) high pressure experiments.
Using the SMC-5000 apparatus, we conducted melting experiments on some lower crustal amphibolites taken from the Hidaka metamorphic belt in Hokkaido and the Ichiomegata crater in Akita prefecture. The melt frctions as well as the composition of melt and residues were determine with EPMA.The results were then compared with petrologic datra on calc-alkaline volcanic rocks. Based on the comparison, we proposed a model for the deep root zone of Japanese volcanoes.
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