The possibility of giant eruptions on the Tokara Islands, southern Kyushu, Japan : verification of the suspected submarine calderas
| Project/Area Number |
19340165
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Petrology/Mineralogy/Science of ore deposit
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| Research Institution | Kumamoto University |
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Principal Investigator |
YOKOSE Hisayoshi Kumamoto University, 大学院・自然科学研究科, 准教授 (50230644)
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| Co-Investigator(Kenkyū-buntansha) |
KOBAYASHI Tetsuo 鹿児島大学, 大学院・理工学研究科, 教授 (70112430)
NAGAOKA Shinji 長崎大学, 教育学部, 教授 (80244028)
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| Project Period (FY) |
2007 – 2009
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| Project Status |
Completed (Fiscal Year 2009)
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| Budget Amount *help |
¥12,740,000 (Direct Cost: ¥9,800,000、Indirect Cost: ¥2,940,000)
Fiscal Year 2009: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2008: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2007: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
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| Keywords | トカラ列島 / 海底火山活動 / 海底カルデラ / 琉球弧火山活動 / 海底カルデデ / 酸性海底火山活動 / 火山災害予測 / 北部琉球弧 / 火山 / 防災 / 岩石・鉱物・鉱床学 / 海洋科学 |
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| Research Abstract |
To understand submarine volcanism of the Tokara Islands, Northern Ryukyu arc, we carried out eight submarine exploration cruises with dredge survey. The volcanic rocks recovered from the sea floor and submarine flanks indicate the volcanic activities have occurred during the Quaternary and are distributed widely on the studied area. In situ rhyolitic pumice fragments are found in the vicinity of the circular submarine depressions, ～15km in diameter. Occurrence and geochemical characteristics of the recovered samples suggest strongly huge eruptions of forming a gigantic submarine caldera on the Tokara Islands. The geochemical characteristics of the samples imply that volcanisms and hydrothermal activities on the Tokara Islands could be controlled by the irregular geometry of the subducting Philippine Sea Plate.
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Report
(4 results)
Research Products
(26 results)
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[Journal Article] トカラ列島における中期更新世の酸性火山活動2010
Author(s)
横瀬久芳, 佐藤創, 藤本悠太, MHT.Mirabueno, 小林哲夫, 秋元和実, 吉村浩, 森井康宏, 山脇信博, 石井輝秋, 本座栄一
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Related Report
Peer Reviewed
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[Presentation] トカラ列島の海底カルデラ群2:KT00-15, KT07-2, KT07-21, NAG 252航海で採取された新鮮な酸性火山岩類2009
Author(s)
横瀬久芳, 佐藤創, 藤本悠太, M.M. Hannah, 島津崇, 秋元和実, 石井輝秋, 本座栄一
Organizer
地球惑星連合大会
Place of Presentation
千葉, 幕張メッセ
Year and Date
2009-05-26
Related Report
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[Presentation] 北部琉球弧, トカラ火山列の第四紀巨大海底カルデラ群:海底探査で得られた証拠2009
Author(s)
横瀬久芳, 佐藤創, 小林哲夫, M.H. Mirabueno, 秋元和實, 吉村浩, 森井康宏, 山脇信博, 石井輝秋
Organizer
地球惑星連合大会
Place of Presentation
千葉, 幕張メッセ
Year and Date
2009-05-16
Related Report
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[Presentation] Regularly spaced submarine rhyolitic-calderas on the Tokara volcanic ridge, northern Ryukyu arc, Japan2009
Author(s)
Yokose H., Sato H., Fujimoto Y., Mirabueno M.H., Kobayashi T, Akimoto K., Yoshimura H., Morii Y., Yamawaki N
Organizer
EGU 2009 Meeting
Place of Presentation
Austria, the Austria Center Vienna
Year and Date
2009-04-24
Related Report
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