2010 Fiscal Year Final Research Report
Conditions for the chemical compositions of Mid-Ocean Ridge Basalts in the case of the ultra-slow spreading Southwestern Indian Ridge
| Project/Area Number |
20540448
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Geology
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| Research Institution | Senshu University |
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Principal Investigator |
SATO Hiroshi Senshu University, 経営学部, 准教授 (50365847)
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| Co-Investigator(Kenkyū-buntansha) |
KUMAGAI Hidenori 独立行政法人海洋研究開発機構, 地球内部変動研究センター, 技術研究主任 (10344285)
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| Project Period (FY) |
2008 – 2010
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| Keywords | テクトニクス / 中央海嶺 / 玄武岩 / 化学組成 / 微量元素 |
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| Research Abstract |
Petrological and geochemical analysis are performed for the mid-ocean ridge basalts and mantle peridotites recovered along the ultra-slow spreading Southwest Indian ridge from 34°E to 40°E. Estimated physical conditions, e.g. pressure and temperature, for producing magma beneath the ridge based on major element compositions do not vary along the ridge. However, basalts from distinct ridge morphology have different trace element compositions. It suggests that the chemical heterogeneity of source mantle compositions beneath the ridge, rather than physical conditions of mantle, might strongly affect the chemical compositions of mid-ocean ridge basalts.
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Research Products
(12 results)
