ラマン分光岩石学：含マイクロ・ダイヤモンド捕獲岩に記録されたプルーム活動の解読

2012 Fiscal Year Annual Research Report

• Project/Area Number: 21244083
• Research Institution: Nagoya University
• Principal Investigator: 榎並 正樹 名古屋大学, 年代測定総合研究センター, 教授 (20168793)
• Co-Investigator(Kenkyū-buntansha): 水上 知行 金沢大学, 自然システム学系, 助教 (80396811) ; WALLIS R・Simon 名古屋大学, 環境学研究科, 教授 (30263065) ; 荒井 章司 金沢大学, 自然システム学系, 教授 (20107684) ; 加藤 丈典 名古屋大学, 年代測定総合研究センター, 准教授 (90293688)
• Project Period (FY): 2009-04-01 – 2013-03-31
• Keywords: マイクロ・ダイヤモンド / ラマン分光 / 捕獲岩 / イメージング / 音響光学的可変フィルター

Research Abstract

（１）イメージング・ラマン分光装置の弱点であった，照射されるレーザー強度が資料面上で不均一であるためにスペクトルの強度が不均一になること，および対象とする試料によっては，蛍光励起が強くバックグラウンドが高くなるためS/N値が悪くなる点に対応した．これらに対する対応はすでに2011年から始めて一部の成果は公表していたが，最終的に均一な蛍光板上で蛍光強度を測定し，その際観測された蛍光の不均一が励起光強度の関数であると見なして補正を行う，および任意のスペクトルのピーク位置と任意の波数だけずらした位置で測定したラマンそれぞれの強度から補正するプログラムを完成させた．
（２）マイクロダイヤモンドを含む捕獲岩が産する愛媛県新宮地域を中心として，アルカリ玄武岩岩脈に捕獲されているマントルゼノリスの鉱物学的・岩石学的記載を中心とした研究を続けた．新宮地域の斑れい岩質ゼノリスに注目すると，含角閃岩斑れい岩，含斜方輝石斑れい岩―輝岩と斑れい岩ノーライトに区分される．このうち，斑れい岩は新宮直下の下部地殻に由来し，斑れい岩―輝岩は母岩であるアルカリ玄武岩マグマからの集積岩，斑れい岩ノーライトはアルカリ玄武岩マグマによる交代作用を被った斑れい岩質岩であると考えられる．斑れい岩ノーライトは， Cr2O3に富むにもか変わらずアルカリ元素に富むという特徴を持つ．これは，アルカリ玄武岩質マグマの上昇によるリソスフェアマントル中の斜方輝石の同化作用を示している可能性がある．また，著しくHFS元素に富む特徴は，マグマ進化の過程でカーボナタイトメルトの分離があったことを示唆する．アルカリマグマ活動の初期に低い部分融解度によって形成されたアルカリマグマが，大陸リソスフェアを改変した可能性がある．

Current Status of Research Progress

Reason

24年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

24年度が最終年度であるため、記入しない。

Research Products

• [Journal Article] Paleo-mantle wedge preserved in the Sambagawa high-pressure metamorphic belt and the thickness of forearc continental crust (2013)
  • Author(s): Aoya, M., Endo, S., Mizukami, T. and Wallis, S. R.
  • Journal Title: Geology Volume: 41 Pages: 451-454
  • DOI: 10.1130/G33834.1
  • Peer Reviewed
• [Journal Article] Earth's youngest exposed granite and its tectonic implications: the 10-0.8 Ma Kurobegawa Granite (2013)
  • Author(s): Ito, H. Yamada, R. Tamura, A. Arai, S. Horie, K. and Hokada, T.
  • Journal Title: Scientific Reports Volume: 3
  • DOI: 10.1038/srep01306
  • Peer Reviewed
• [Journal Article] High-Mg low-Ni olivine cumulates from a Pan-African accretionary belt in southern India: Implications for the genesis of volatile-rich high-Mg melts in suprasubduction setting (2013)
  • Author(s): Rajesh, V.J., Arai, S., Satish-Kumar, M., Santosh, M. and Tamura, A.
  • Journal Title: Precambrian Research Volume: 227 Pages: 409-425
  • DOI: 10.1016/j.precamres.2012.08.004
  • Peer Reviewed
• [Journal Article] Petrology and chemistry of basal lherzolites above the metamorphic sole from Wadi Sarami central Oman ophiolite (2013)
  • Author(s): Khedr, M.Z., Arai, S. and Python, M.
  • Journal Title: Journal of Mineralogical and Petrological Sciences Volume: 108 Pages: 13-24
  • DOI: 10.2465/jmps.121026
  • Peer Reviewed
• [Journal Article] Influence of garnet hosts on the Raman spectra of quartz inclusions (2012)
  • Author(s): Enami, M
  • Journal Title: Journal of Mineralogical and Petrological Sciences Volume: 107 Pages: 173-180
• [Journal Article] Eclogite from the Kumon range, Myanmar: Petrology and tectonic implications (2012)
  • Author(s): Enami, M., Zaw Win Ko, Aung Win and Tsuboi, M
  • Journal Title: Gondwana Research Volume: 21 Pages: 548-558
• [Journal Article] Podiform chromitite classification revisited: A comparison of discordant and concordant chromitite pods from Wadi Hilti, northern Oman ophiolite (2012)
  • Author(s): Miura, M., Arai, S., Ahmed, A.H., Mizukami, T., Okuno, M. and Yamamoto, S
  • Journal Title: Journal of Asian Earth Sciences Volume: 59 Pages: 52-61
• [Journal Article] Retrograde strontium metasomatism in serpentinite melange of the Kurosegawa Zone in central Kyushu, Japan (2012)
  • Author(s): Miyazoe, T., Enami, M., Nishiyama, T. and Mori, Y.
  • Journal Title: Mineralogical Magazine Volume: 76 Pages: 635-647
  • DOI: 10.1016/j.gr.2011.07.018
  • Peer Reviewed
• [Journal Article] nternal structure of the Median Tectonic Line fault zone, SW Japan, revealed by borehole analysis (2012)
  • Author(s): Shigematsu, N., Fujimoto, K., Tanaka, N., Furuya, N., Mori, H. and Wallis, S.
  • Journal Title: Tectonophysics Volume: 532 Pages: 103-118
  • DOI: 10.1016/j.tecto.2012.01.024
  • Peer Reviewed
• [Journal Article] E-W extension at 19 Ma in the Kung Co area, S. Tibet: Evidence for contemporaneous E-W and N-S extension in the Himalayan orogen (2012)
  • Author(s): Mitsuishi, M., Wallis, S., Aoya, M.. Lee, J. and Wang, Y.
  • Journal Title: Earth and Planetary Science Letters Volume: 325 Pages: 10-20
  • DOI: 10.1016/j.epsl.2011.11.013
  • Peer Reviewed
• [Journal Article] Slow subduction and buoyant exhumation of the Sanbagawa eclogite (2012)
  • Author(s): Endo, S., Wallis, S., Tsuboi, M., Aoya, M. and Uehara, S.
  • Journal Title: Lithos Volume: 146 Pages: 183-201
  • DOI: 10.1016/j.lithos.2012.05.010
  • Peer Reviewed
• [Journal Article] Methane and propane micro-inclusions in olivine in titanoclinohumite-bearing dunites from the Sanbagawa high-P metamorphic belt, Japan: Hydrocarbon activity in a subduction zone and Ti mobility (2012)
  • Author(s): Arai, S., Ishimaru, S. and Mizukami, T.
  • Journal Title: Earth and Planetary Science Letters Volume: 353-354 Pages: 1-11
  • DOI: 10.1016/j.epsl.2012.07.043
  • Peer Reviewed
• [Journal Article] Sulfide-rich dunite within a thick Moho transition zone of the northern Oman ophiolite: implications for the origin of Cyprus-type sulfide deposits (2012)
  • Author(s): Negishi, H., Arai, S., Yurimoto, H., Ito, S., Ishimaru, S., Tamura, A. and Akizawa, N.
  • Journal Title: Lithos Volume: 164-167 Pages: 22-35
  • DOI: 10.1016/j.lithos.2012.11.024
  • Peer Reviewed
• [Journal Article] ポディフォーム・クロミタイトはマントル内を循環するか？：超高圧クロミタイトの謎 (2012)
  • Author(s): 荒井章司
  • Journal Title: 岩石鉱物科学 Volume: 41 Pages: 247-256
  • DOI: 10.2465/gkk.120530
  • Peer Reviewed
• [Journal Article] Behavior of MORB magmas at uppermost mantle beneath a fast-spreading axis: an example from Wadi Fizh of the northern Oman ophiolite (2012)
  • Author(s): Akizawa, N., Arai, S. and Tamura, A.
  • Journal Title: Contributions to Mineralogy and Petrology Volume: 164 Pages: 601-625
  • DOI: 10.1007/s00410-012-0762-4
  • Peer Reviewed
• [Journal Article] Silica enrichment on Group II xenoliths by evolved alkali basalt from Jeju Island, South Korea: implication for modification of intraplate deep-seated rocks (2012)
  • Author(s): Yang, K., Szabó, Cs. and Arai, S.
  • Journal Title: Mineralogy and Petrology Volume: 106 Pages: 107-130
  • DOI: 10.1007/s00710-012-0222-x
  • Peer Reviewed
• [Journal Article] Conformity and precision of CO2 densimetry in CO2 inclusions: microthermometry versus Raman microspectroscopic densimetry (2012)
  • Author(s): Kobayashi, T., Yamamoto, J., Hirajima, T., Ishibashi, H., Hirano, N., Kai, Y., Prikhod’ko and Arai, S.
  • Journal Title: Journal of Raman Spectroscopy Volume: 43 Pages: 1126-1133
  • DOI: 10.1002/jrs.3134
  • Peer Reviewed
• [Journal Article] Exsolution of garnet and clinopyroxene from high-Al pyroxenes in Xugou peridotite, E China (2012)
  • Author(s): Spengler, D., Obata, M., Hirajima, T., Ottolini, L., Ohfuji, H., Tamura, A. and Arai, S.
  • Journal Title: Journal of Petrology Volume: 53 Pages: 1477-1504
  • DOI: 10.1093/petrology/egs023
  • Peer Reviewed
• [Journal Article] Thermal structure beneath Far Eastern Russia inferred from geothermobarametric analyses of mantle xenoliths: direct evidence for high geothermal gradient in backarc lithosphere (2012)
  • Author(s): Yamamoto, J., Nishimura, K., Ishibashi, H., Kagi, H., Arai, S. and Prikhod’ko, V.S.
  • Journal Title: Tectonophysics Volume: 554-557 Pages: 74-82
  • DOI: 10.1016/j.tecto.2012.06.005
  • Peer Reviewed
• [Journal Article] Possibility of titanium transportation within a mantle wedge: formation process of titanoclinohumite in Fujiwara dunite in Sanbagawa belt, Japan (2012)
  • Author(s): Ishimaru, S. and Arai, S.
  • Journal Title: Solid Earth Discussions Volume: 4 Pages: 203-239
  • DOI: 10.5194/sed-4-203-2012
  • Peer Reviewed
• [Journal Article] 飛騨山脈の深成岩マグマの貫入時期とテクトニクス ― LA-ICP-MSによるジルコンのU-Pb年代測定法の適用 － (2012)
  • Author(s): 伊藤久敏・田村明弘・森下知晃・荒井章司
  • Journal Title: 地質学雑誌 Volume: 118 Pages: 449-456
  • DOI: 10.5575/geosoc.2012.0014
  • Peer Reviewed
• [Journal Article] Gabbroic xenoliths and megacrysts in Pleisto-Holocene alkali basalts from Jeju Island, South Korea: implications for metasomatism of the lower continental crust (2012)
  • Author(s): Yang, K., Arai, S., Yu, J-E., Yun, S-H. and Hwang, J-Y
  • Journal Title: Lithos Volume: 142-143 Pages: 201-215
  • DOI: 10.1016/j.lithos.2012.03.006
  • Peer Reviewed
• [Journal Article] Characterization of the thermally metamorphosed mantle-crust transition zone of the Neoproterozoic ophiolite at Gebel Mudarjaj, South Eastern Desert, Egypt (2012)
  • Author(s): Ahmed, A.H., Gharib, M.E. and Arai, S.
  • Journal Title: Lithos Volume: 142-143 Pages: 67-83
  • DOI: 10.1016/j.lithos.2012.02.014
  • Peer Reviewed
• [Journal Article] Denudation history of the Kiso Range, central Japan, and its tectonic implications: Constraints from low-temperature thermochronology (2012)
  • Author(s): Sueoka, S., Kohn, B.P., Tagami, T., Tsutsumi, H., Hasebe, N., Tamura, A. and Arai, S.
  • Journal Title: Island Arc Volume: 21 Pages: 32-35
  • DOI: 10.1111/j.1440-1738.2011.00789.x
  • Peer Reviewed
• [Journal Article] Mineral chemistry of the Neoproterozoic Alaskan-type Akarem Intrusion with special emphasis on amphibole: Implications for the pluton origin and evolution of subduction-related magma (2012)
  • Author(s): Abd El-Rahman, Y., Helmy, H.M., Shibata, T., Yoshikawa, M., Arai, S. and Tamura, A.
  • Journal Title: Lithos Volume: 155 Pages: 410-425
  • DOI: 0.1016/j.lithos.2012.09.015
  • Peer Reviewed
• [Journal Article] A new view on the petrogenesis of the Oman ophiolite chromitites from microanalyses of chromite-hosted inclusions. (2012)
  • Author(s): Borisova, A., Ceuleneer, G., Kamenetsky, V., Arai, S., Béjina, F., Bindeman, I., Polvé, M., de Parseval, P., Aigouy, T. and Pokrovski, G.
  • Journal Title: Journal of Petrology Volume: 53 Pages: 2411-2440
  • DOI: 10.1093/petrology/egs054
  • Peer Reviewed