2008 Fiscal Year Final Research Report
Estimation of thermal structure in the oceanic upper crust using crystal size variations through the sheeted dike complex
| Project/Area Number |
18540472
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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 |
Petrology/Mineralogy/Science of ore deposit
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| Research Institution | Kanazawa University (2008)
Shizuoka University (2006-2007) |
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Principal Investigator |
UMINO Susumu Kanazawa University, 自然システム学系, 教授 (30192511)
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| Project Period (FY) |
2006 – 2008
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| Keywords | シート状岩脈群 / 結晶粒径分布 / 温度勾配 / オマーンオフィオライト / 1256D掘削孔 / 海洋地殻 / マグマ供給率 |
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| Research Abstract |
オマーンオフィオライトのシート状岩脈群の石基鉱物粒径の層序変化をもとに拡大軸直下における上部地殻の温度構造を推定した。マグマのリキダスを1150℃,シート状岩脈群最上部の平均温度を100℃と仮定すると,母岩温度は噴出岩層/シート状岩脈群境界からの深さ570mで180℃,990m で最高温度670℃,シート状岩脈群/上部ガブロ境界で530℃であった。また,シート状岩脈群下部330m の地温勾配は最大1.7℃/m と推定された。
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[Journal Article] 2008. The origin of the sheeted dike complex at superfast spread East Pacific Rise revealed by deep ocean crust drilling at ODP Hole 1256D2007
Author(s)
Umino, S, Crispini, L, Tartarotti, P, Teagle, D.A.H, Alt, J.C, Miyashita, S. and Banerjee, N.R.
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Journal Title
Geochem. Geophys. Geosyst
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[Journal Article] 2007. Data Report : Textural variation of Units 1256C-18 and 1256D-1 lava pond, with special reference to recrystallization of the base of Unit 1256C-18 (PDF). In Teagle, D.A.H., Wilson, D.S., Acton, G.D., and Vanko, D.A. (Eds.), Proc. ODP, Sci. Results2007
Author(s)
Umino, S.
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Journal Title
206 : College Station, TX (Ocean Drilling Program)
Pages: 1-32
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[Journal Article] 2007. Discrete plumbing systems and heterogeneous magma sources of a 24 km^3 off-axis lava field on the western flank of East Pacific Rise, 14°S
Author(s)
Geshi, N., Umino, S., Kumagai, H., Sinton, J.M., White, S.M., Kishimoto, K. and Hilde, T.W.
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Journal Title
Earth Planet. Sci. Lett. 258
Pages: 61-78
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[Presentation] The conditions of the formation of the sheeted dike complex at superfast spread East Pacific Rise revealed by deep ocean crust drilling at ODP Hole 1256D2008
Author(s)
Umino, S, Crispini, L, Tartarotti, P, Teagle, D.A, Alt, J.C, Miyashita, S, and Banerjee, N.
Organizer
AGU 2008 Fall Meeting
Place of Presentation
San Francisco
Year and Date
2008-12-18
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[Presentation] J.M. Slope Control of The Submarine Lava Morphology Revealed by The Transect Across The Southern East Pacific Rise2008
Author(s)
Umino, S, Kisimoto, K, Hilde, T.W.C, Geshi, N, White, S.M, Kumagai, H. and Sinton
Organizer
Abstracts of 5th Annual Meeting of Asia Oceania Geosciences Society 2008
Place of Presentation
Busan
Year and Date
2008-06-17
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[Presentation] 2007. Tungsten abundance and isotopic compositions of Ocean Island Basalts, an Oceanic Plateau, MORB samples : in search for a core-mantle interaction2007
Author(s)
Takamasa, A, Nakai, S, Sahoo , Y. V, Hanyu, T, Tatsumi, Y, Tejada, M, Kumagai, H, Umino, S. and Sano, T.
Organizer
AGU 2007 Fall Meeting
Place of Presentation
San Francisco
Year and Date
2007-12-18
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[Presentation] IODP Expedition 3096&3127 Scientific Parties. Contrasting upper crustal structures revealed by deep ocean crust drilling --- insights into shallow magma plumbing systems beneath intermediate versus superfast spreading ridges2006
Author(s)
Umino, S., Crispini, L., Tartarotti, P., Teagle, D.A.H., Banerjee, N.R.
Organizer
Program and Abstracts of the 19th General Meeting of the International Mineralogical Association, 225p (Invited)
Place of Presentation
Kobe
Year and Date
2006-07-26
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