Investigation of mantle electrical conductivity beneath the Tristan da Cunha hotspot in Atlantic Ocean by Japan-Germany collaboration
| Project/Area Number |
23403005
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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 | 海外学術 |
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| Research Field |
Solid earth and planetary physics
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| Research Institution | The University of Tokyo |
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Principal Investigator |
KIYOSHI Baba 東京大学, 地震研究所, 助教 (70371721)
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| Co-Investigator(Renkei-kenkyūsha) |
UTADA Hisashi 東京大学, 地震研究所, 教授 (70134632)
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| Research Collaborator |
JEGEN-KULCSAR Marion キール大学, 海洋研究所(IFM-GEOMAR)
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| Project Period (FY) |
2011-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥19,110,000 (Direct Cost: ¥14,700,000、Indirect Cost: ¥4,410,000)
Fiscal Year 2014: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2012: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2011: ¥10,010,000 (Direct Cost: ¥7,700,000、Indirect Cost: ¥2,310,000)
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| Keywords | マントル / ホットスポット / トリスタン・ダ・クーニャ / 大陸分裂 / 電気伝導度 / MT法 / 海底電位磁力計 / 国際研究者交流 / マントルプルーム / 大西洋 |
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| Outline of Final Research Achievements |
This research project aims to investigate the electrical structure of the mantle beneath the Tristan da Cunha hotspot in southern Atlantic Ocean to deepen the knowledge of the hotspot source. This is a collaborative study between Japanese and German research groups. The seafloor electromagnetic observation was conducted for an year from January 2012 by using total 26 ocean bottom electromagnetometers. The time variation of the natural electromagnetic field was measured and analyzed to obtain electromagnetic response functions which have information of Earth's electrical conductivity. The quality of observed data were good for most of the stations. Further inversion analysis of the response functions will enable us to image a three-dimensional electrical conductivity structure beneath the observation area.
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Report
(5 results)
Research Products
(29 results)
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[Presentation] Geothermal and compositional variety of old oceanic upper mantle in northwestern Pacific: Insights from seafloor magnetotelluric experiments2014
Author(s)
Baba, K., Utada, H., Tada, N., Shimizu, H., Zhang, L., and Liang, P.
Organizer
AGU 2014 fall meeting
Place of Presentation
アメリカ合衆国・サンフランシスコ
Year and Date
2014-12-15 – 2014-12-19
Related Report
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[Presentation] Thermal and compositional variety of old oceanic upper mantle in northwestern Pacific revealed from marine magnetotelluric experiments2014
Author(s)
Baba, K., Tada, N., Liang, P., Zhang, L., Shimizu, H., and Utada, H.
Organizer
22nd International Workshop on Electromagnetic Induction of the Earth
Place of Presentation
ドイツ・ワイマール
Year and Date
2014-08-24 – 2014-08-30
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[Presentation] Electromagnetic constraints on the structure of the oceanic upper-mantle : Consistencies and inconsistencies with other observations2011
Author(s)
Evans, R.L., Lizarralde, D., Collins, J.A., Elsenbeck, J., Tursack, E., Hirth, G., Gaherty, J.B., Pommier, A., Baba, K., Matsuno, T.
Organizer
AGU fall meeting 2011
Place of Presentation
米国・サンフランシスコ(招待講演)
Year and Date
2011-12-07
Related Report
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[Presentation] 高速拡大中央海嶺下の電気伝導度構造2011
Author(s)
馬場聖至, Chave, A.D., Evans, R.L., Tarits, P., Hirth, G., Mackie, R.L.
Organizer
日本地質学会第118年学術大会・日本鉱物科学会2011年年会合同学術大会
Place of Presentation
茨城市茨城大学(招待講演)
Year and Date
2011-09-09
Related Report
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[Presentation] Ocean bottom geophysical observation on the seafloor near the Society hot spot, Frech Polynesia2011
Author(s)
Suetsugu, D., Shiobara, H., Sugioka, H., Ito A., Isse, T, Baba, K., Kasaya, T., Tada, N.
Organizer
日本地球惑星科学連合2011年大会
Place of Presentation
千葉市幕張メッセ
Year and Date
2011-05-25
Related Report
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[Presentation] Ocean bottom geophysical observation on the seafloor near the Society hot spot, Frech Polynesia2011
Author(s)
Suetsugu, D., Shiobara, H., Isse, T., Sugioka, H., Ito A., Baba, K., Kasaya, T., Tada, N.
Organizer
EGU General Assembly 2011
Place of Presentation
オーストリア・ウィーン
Year and Date
2011-04-06
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