2010 Fiscal Year Annual Research Report
Project/Area Number |
21684032
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Research Institution | Tohoku University |
Principal Investigator |
鈴木 昭夫 東北大学, 大学院・理学研究科, 准教授 (20281975)
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Keywords | マグマ / 水 / 高温高圧 / 放射光 / 粘度 |
Research Abstract |
マグマの粘度は地球内部におけるマグマの移動をコントロールする.特にマグマではSiO4やAlO4のネットワークの連結の度合いが粘度に強く影響する.このネットワークはマグマの組成,温度,圧力および揮発性成分量で変わるため,様々な条件下で粘度を測定してこれらが粘度にどの様な影響を調べることは重要である.しかしながら、高圧力下での粘度測定は多くが2GPa以下の比較的低圧下で行われており,それ以上の圧力下についてはよく分かっていない.今年度は,茨城県つくば市にある高エネルギー加速器研究機構物質構造科学研究所放射光実験施設のPF-AR NE7Aビームラインに設置された大容量マルチアンビル型高圧発生装置MAX-IIIとX線イメージングシステムを使用して高圧高温下における粘度測定を行った.特に輝石の端成分であるNaAlSi206とCaMgSi206組成のメルトに着目し,粘度の温度および圧力依存性を6GPaまで行った.粘度の圧力依存性はメルトの重合度に応じて異なると考えられてきた.つまり,ネットワーク重合度の高いメルトは圧力の増加に対して粘度が減少し,逆に重合度が低いメルトでは粘度は増加する.本研究の結果,重合度の高いNaAlSi206メルトの粘度は3GPaまでは従来の報告どおり減少するものの,それ以上の圧力では減少が止まり,僅かに正の圧力依存性を示すことが分かった.これはメルトの構造変化に起因すると考えられるが,特にAlの配位数変化が影響していると思われる.
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Research Products
(26 results)
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[Journal Article] Pressure and Temperature dependence of the viscosity of a NaAlSi_2O_6 melt.2011
Author(s)
Suzuki, A., Ohtani, E., Terasaki, H., Nishida, K., Hayashi, H., Sakamaki, T., Shibazaki, Y., Kikegawa, T.
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Journal Title
Physics and Chemistry of Minerals
Volume: 38
Pages: 59-64
Peer Reviewed
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[Journal Article] Density measurements of liquid FeS at high pressure using synchrotron X-ray absorption.2011
Author(s)
Nishida, K., Ohtani, E., Urakawa, S., Suzuki, A., Sakamaki, T., Terasaki, H., Katayama, Y.
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Journal Title
American Mineralogist
Volume: 96(In press)
Peer Reviewed
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[Journal Article] Designing PLANET : the neutron beamline for high-pressure material science at J-PARC.2010
Author(s)
Arima, H., Hattori, T., Komatsu, K., Abe, J., Utsumi, W., Kagi, H., Suzuki, A., Suzuya, K., Kamiyama, T., Arai, M., Yagi, T.
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Journal Title
Journal of Physics : Conference Series
Volume: 215
Pages: 012025(1-6)
Peer Reviewed
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[Journal Article] Pressure-volume-temperature equation of state of tungsten carbide to 32 GPa and 1673 K.2010
Author(s)
Litasov, K.D., Shatskiy, A., Fei, Y., Suzuki, A., Ohtani, E.Funakoshi, K.
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Journal Title
Journal of Applied Physics
Volume: 108
Pages: 053513(1-7)
Peer Reviewed
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[Journal Article] Density of high-Ti basalt magma at high pressure and origin of heterogeneities in the lunar mantle.2010
Author(s)
Sakamaki, T., Ohtani, E., Urakawa, S., Suzuki, A., Katayama, Y., Zhao, D.
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Journal Title
Earth and Planetary Science Letters
Volume: 299
Pages: 285-289
Peer Reviewed
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[Presentation] Rheology of vine-grained forsterrite aggregate under deep upper mantle conditions.2010
Author(s)
Nishiraha, Y., Ohuchi, T., Kawazoe, T., Spengler, D., Tasaka, M., Hiraga, T., Kikegawa, T., Suzuki, A., Ohtani, E.
Organizer
AGU 2010 Fall Meeting
Place of Presentation
San Francisco, USA
Year and Date
2010-12-16
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[Presentation] Viscosity of basaltic magma at high pressure.2010
Author(s)
Suzuki, A., Ohtani, E., Ando, R., Terasaki, H., Sakamaki, T., Funakoshi, K.
Organizer
IMA2010, 20th General Meeting of the International Mineralogical Association
Place of Presentation
Budapest, Hungary
Year and Date
2010-08-27
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[Presentation] Density measurement of liquid Fe-Si using sink/float method under high pressure.2010
Author(s)
Tateyama, R., Ohtani, E., Suzuki, A., Terasaki, H., Nishida, K., Shibazaki, Y., Kikegawa, T.
Organizer
Global COE Symposium 2010 "Dynamic Earth and Heterogeneous Structure" (international)
Place of Presentation
Sendai, Japan
Year and Date
2010-07-13
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[Presentation] Equation of state of liquid FeS at high pressure and high temperature.2010
Author(s)
Nishida, K., Ohtani, E., Suzuki, A., Terasaki, H., Urakawa, S., Sakamaki, T., Shibazaki, Y., Katayama, Y., Kikegawa, T.
Organizer
Global COE Symposium 2010 "Dynamic Earth and Heterogeneous Structure" (international)
Place of Presentation
Sendai, Japan
Year and Date
2010-07-13
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[Presentation] Viscosity of K2TiSi4O9 melt at high pressure and high tempearture.2010
Author(s)
Suzuki, A., Ohtani, E., Nishida, K., Tateyama, R., Shibazaki, Y., Kikegawa, T.
Organizer
Global COE Symposium 2010 "Dynamic Earth and Heterogeneous Structure" (international)
Place of Presentation
Sendai, Japan
Year and Date
2010-07-13
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[Presentation] Deformation experiments on fayalite using deformation-cubic anvil press and monochromatic X-rays.2010
Author(s)
Shiraishi-Ohnuma, R., Ohtani, E., Kubo, T., Doi, N., Suzuki, A., Shimojuku, A., Kato, T., Kikegawa, T.
Organizer
Global COE Symposium 2010 "Dynamic Earth and Heterogeneous Structure" (international)
Place of Presentation
Sendai, Japan
Year and Date
2010-07-13
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[Presentation] Density and viscosity of lunar high-Ti magma at high pressure2010
Author(s)
Suzuki, A., Ohtani E., Sakamaki, T., Urakawa, S., Katayama, Y., Nishida, K., Tateyama, R., Kikegawa, T.
Organizer
2010 Western Pacific Geophysics Meeting
Place of Presentation
Taipei, Taiwan
Year and Date
2010-06-23
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[Presentation] Density, viscosity and structure of basaltic magma under high pressure and high temperature.2010
Author(s)
Sakamaki, T., Ohtani E., Suzuki, A., Urakawa, S., Terasaki, H., Katayama, Y., Funakoshi, K.
Organizer
Japan Geoscience Union Meeting 2010 (international session)
Place of Presentation
Chiba, Japan
Year and Date
2010-05-24
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[Presentation] Viscosity of K2TiSi4O9 melt at high pressure and high temperature.2010
Author(s)
Suzuki, A., Ohtani E., Nishida, K., Tateyama, R., Shibazaki, Y., Kikegawa, T.
Organizer
Japan Geoscience Union Meeting 2010 (international session)
Place of Presentation
Chiba, Japan
Year and Date
2010-05-24
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