2010 Fiscal Year Final Research Report
A Quest for Reference Electrical Conductivity Profile in Continental Upper Mantle through Long Dipole Telluric Observations in Cooperation between Australia and Japan
| Project/Area Number |
20403006
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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 | Tohoku University (2010)
Tokyo Institute of Technology (2008-2009) |
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Principal Investigator |
ICHIKI Masahiro 東北大学, 大学院・理学研究科, 助教 (80359182)
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| Co-Investigator(Kenkyū-buntansha) |
FUJITA Kiyoshi 大阪大学, 大学院・工学研究科, 准教授 (00283862)
OGAWA Yasuo 東京工業大学, 火山流体研究センター, 教授 (10334525)
UYESHIMA Makoto 東京大学, 地震研究所, 准教授 (70242154)
OMORI Soichi 東京工業大学, 大学院・理工学研究科, 准教授 (90267469)
YAMAMOTO Shinji 東京工業大学, 大学院・理工学研究科, 特別教育研究プロジェクト研究員 (30467013)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 地球惑星内部構造 / 電気伝導度 / 地殻マントル物質 / 地球内部の炭素 / MT法 / 海洋ダイナモ |
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| Research Abstract |
We installed the two telluric observation sites, the dipole spans of which are about 1 km, in the central part of Australian Continent in order to elucidate reference electrical conductivity profile in continental upper mantle. The electrical conductivity profile analyzed using the obtained data shows more resistive than the Canadian Shield's result. We also developed a procedure in which electrical conductivity profile could be calculated from arbitral chemical composition among the principal five elements (Ca, Fe, Mg, Al, Si)and from the laboratory experimental data of the mineral conductivity. Standard chemical composition model in continental upper mantle gave more conductive profile than the observed one through the procedure. The result reveals that standard chemical composition and electrical conductivity profile in continental upper mantle is not consistent with each other.
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