Geochemical investigation on core-mantle interactions

• Project/Area Number: 17340167
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Geochemistry/Astrochemistry
• Research Institution: The University of Tokyo
• Principal Investigator: NAKAI Shun'ichi The University of Tokyo, Earthquake Research Institute, Asspciate Professor (50188869)
• Co-Investigator(Kenkyū-buntansha): HANYU Takeshi Institute for Research on Earth Evolution, Japan Agency for Marine-Earth Science and Technology, 地球内部変動研究センター, Senior Researcher (50359197)
• Project Period (FY): 2005 – 2008
• Project Status: Completed (Fiscal Year 2007)
• Budget Amount: ¥10,230,000 (Direct Cost: ¥9,300,000、Indirect Cost: ¥930,000); Fiscal Year 2007: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2006: ¥3,000,000 (Direct Cost: ¥3,000,000); Fiscal Year 2005: ¥3,200,000 (Direct Cost: ¥3,200,000)
• Keywords: core-mantle interaction / tungsten isotope tracer / hafnium-182 / ocean island basalt / ICP-mass spectrometer / extinct radioactive nuclide / superplume / コア-マントル相互作用 / 銀同位体比 / 鉛同位体比 / マントルプリューム

Research Abstract

We investigated if there exists geochemical evidence which shows core-mantle interactions in the samples of ocean island basalts related to mantle plumes from deep in the mantle. We used tungsten isotope tracers (182W/183W) which shows different value between core and mantle materials. We developed tungsten purification method using anion-chromatography. The developed method has been applied to the samples of oceanic island basalts, from such as Samoa and St. Helena and Mid-Oceanic Ridge basalts.
Before the analyses we investigated precision of tungsten isotope analyses and found that 182W/183W ratio can be analyzed with a precision of 0.3 epsilon unit. Tungsten abundances as well as isotopic composition were measured.
Anlyses of more than twenty samples show no tungsten isotope anomaly. Considering (1) tungsten abundances in the source of the basaltic estimated tungsten abundances in the samples, (2) precision of tungsten isotopic analyses, (3) tungsten abundance of the core, and (4) tungsten isotopic composition of the core, put tight constraints on the contribution of core material into the source mantle of the analyzed samples was less than 0.5%. In addition, the Earth's mantle is homogeneous regarding tungsten isotopic compositions.
During the study period, we published a paper on chemical purification method for tungsten isotopic analyses and a paper on the tungsten isotopic compositions of the samples from south Pacific samples.

Research Products

• [Journal Article] W isotope compositions of oceanic islands basalts from French Polynesia and their meaning for core-mantle interaction (2009)
  • Author(s): Takamasa, A., Nakai, S., Sahoo, Y., Hanyu, T., Tatsumi, Y.
  • Journal Title: Chemical Geology 260 Pages: 37-46
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Intergranular trace elements in mantle xenoliths from Russian Far East : An example for mantle metasomatism by hydrous melt. (2009)
  • Author(s): Yamamoto, J. Nakai, S., et al.
  • Journal Title: The Island Arc 18 Pages: 225-241
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Attempt to determine U-Th ages of calcite veins in the Nojima fault zone, Japan. (2008)
  • Author(s): Watanabe, Y., Nakai, S., Lin, A.
  • Journal Title: Geochem. J 42 Pages: 507-513
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] 238U-230Th radioactive disequilibrium in the northern Izu arc : (230Th/232Th) in the sub-arc mantle (2008)
  • Author(s): Fukuda, S., Nakai, S., Niihori, K., Tsukui, M., Nakada, S., Fujii, T., Tani, K
  • Journal Title: Geochem. J 42 Pages: 461-479
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] U-Th dating of carbonate nodules from methane seeps off Joetsu, Eastern Margin of Japan Sea. (2008)
  • Author(s): Watanabe, Y., Nakai, S., Hiruta, A., Matsumoto, R., Yoshida, K.
  • Journal Title: Earth Planet. Sci. Lett. 272 Pages: 89-96
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Common origin of plagioclase in last three eruptions of Unzen volcano, Japan. (2008)
  • Author(s): Nakai, S., Maeda, Y., Nakada, S.
  • Journal Title: Jour. Volcan. Geotherm. Res. 175 Pages: 194-188
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Determination of 9Be in geological standard samples, JA-2 and JB-2, and of ^9Be and ^<10>Be in a basaltic rock samples for evaluation of uncertainty involved in ^<10>Be/^9Be ratio measurements (2008)
  • Author(s): Gotan, K., Nakai, S., Matsuzaki, H.
  • Journal Title: Geochemical Journal 42 Pages: 305-308
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Searching and detecting earthquake geochemical precursors in CO2-rich groundwaters from Galicia, Spain. (2008)
  • Author(s): Perez, N. M., Hernandez, P. A., Igarashi, G., Trujillo, I., Nakai, S., et al.
  • Journal Title: Geochemical Journal. 42 Pages: 75-83
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] U-Pb age determinations for seven standard zircons coupled with frequency quintupled Nd-YAG (λ=213 nm)laser ablation system : Evaluation of the efficacy of calibrating LA-ICP-MS zircon analyses with a NIST glass reference material. (2008)
  • Author(s): Orihashi, Y., Nakai, S., Hirata, T.
  • Journal Title: Resource Geology 58 Pages: 101-123
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] U-Pb age determinations for seven standard zircons coupled with frequency quintupled Nd-YAG (λ= 213 nm) laser ablation system : Evaluation of the efficacy of calibrating LA-ICP-MS zircon analyses with a NIST glass reference material (2008)
  • Author(s): Orihashi, Y., Nakai, S., Hirata, T.
  • Journal Title: Resource Geology 58 Pages: 101-123
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Searching and detecting earthquake geochemical precursors in CO2-rich groundwaters from Galicia, Spain (2008)
  • Author(s): Perez, N. M., Hernandez, P. A., Igarashi, G, Trujillo, I., Nakai, S., Sumino, H., Wakita, H.
  • Journal Title: Geochemical Journal 42 Pages: 75-83
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Determination of _9Be in geological standard samples, JA-2 and JB-2, and of ^9Be and ^<10>Be in a basaltic rock samples for evaluation of uncertainty involved in ^<10>Be/^9Be ratio measurements (2008)
  • Author(s): Gotan, K., Nakai, S., Matsuzaki, H.
  • Journal Title: Geochemical Journal 42 Pages: 305-308
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Common origin of plagioclase in last three eruptions of Unzen volcano, Japan (2008)
  • Author(s): Nakai, S., Maeda, Y., Nakada, S.
  • Journal Title: J. Volcanol. Geotherm. Res. 175 Pages: 181-188
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] U-Th dating of carbonate nodules from methane seeps off Joetsu, Eastern Margin of Japan Sea (2008)
  • Author(s): Watanabe, Y., Nakai, S., Hiruta, A., Matsumoto, R., Yoshida, K.
  • Journal Title: Earth Planet. Sci. Lett. 272 Pages: 89-96
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] 238U-230Th radioactive disequilibrium in the northern Izu arc : (230Th/232Th) in the sub-arc mantle (2008)
  • Author(s): Fukuda, S., Nakai, S., Niihori, K., Tsukui, M., Nakada, S., Fujii, T., Tani, K.
  • Journal Title: Geochem. J. 42 Pages: 461-479
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Attempt to determine U-Th ages of calcite veins in the Nojima fault zone, Japan (2008)
  • Author(s): Watanabe, Y., Nakai, S., Lin, A.
  • Journal Title: Geochem. J. 42 Pages: 507-513
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] U-Th dating of carbonate nodules from methane seeps off Joetsu, Eastern Margin of Japan Sea (2008)
  • Author(s): Watanabe, Y., Nakai, S., Hiruta, A., Matsumoto, R, Yoshida, K.
  • Journal Title: Earth Planet. Sci. Lett. 272 Pages: 89-96
  • Peer Reviewed
• [Journal Article] Common origin of plagioclase in last three eruptions of Unzen volcano, Japan (2008)
  • Author(s): Nakai, S., Maeda, Y., Nakada, S.
  • Journal Title: Jour. Volcan. Geotherm. Res. 175 Pages: 194-188
  • Peer Reviewed
• [Journal Article] Allanite-(Ce) as an indicator of the origin of granitic rocks in Japan : importance of Sr-Nd isotopic and chemical composition (2007)
  • Author(s): Hoshino, M., Kimata, M., Arakawa, Y., Shimizu, M., Nakai, S.
  • Journal Title: The Canadian Mineralogist 45 Pages: 1329-1336
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] 紀伊半島中新生珪長質火成岩類の全岩組成の広域的変化 (2007)
  • Author(s): 新正裕尚, 折橋裕二, 和田穣隆, 角井朝昭, 中井俊一
  • Journal Title: 地質学雑誌 175 Pages: 310-325
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Isotope systematics of Li, Sr, Nd, and volatiles in Indian Ocean MORBs of the Rodrigues Triple Junction : constraints on the origin of the DUPAL anomaly (2007)
  • Author(s): Nishio, Y., Nakai, S., Ishii, T., Sano, Y.
  • Journal Title: Geochim. Cosmochim. Acta 71 Pages: 745-759
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Isotope systematics of Li, Sr, Nd, and volatiles in Indian Ocean MORBs of the Rodrigues Triple Junction: constraints on the origin of the DUPAL anomaly (2007)
  • Author(s): Nishio, Y., Nakai, S., Ishii, T., Sano, Y.
  • Journal Title: Geochim. Cosmochim. Acta 71 Pages: 745-759
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Geochemistry of eclogites from the Dabie-Sulu terrane, eastern China : New insights into protoliths and trace element behavior during UHP metamorphism (2007)
  • Author(s): Tang, H. F., Liu, C. Q., Nakai, S., Orihashi, Y.
  • Journal Title: Lithos 95 (3-4) Pages: 441-457
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Allanite-(Ce) as an indicator of the origin of granitic rocks in Japan: importance of Sr-Nd isotopic and chemical composition (2007)
  • Author(s): Hoshino, M., Kimata, M., Arakawa, Y., Shimizu, M., Nakai, S.
  • Journal Title: The Canadian Mineralogist 45 Pages: 1329-1336
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Element partitioning between transition-zone minerals and ultramafic melt under hydrous conditions. (2006)
  • Author(s): Mibe, K., Orihashi, Y., Nakai, S., Fujii, T.
  • Journal Title: Geophys. Res. Lett. 33
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Contribution of slab melting and slab dehydration to magmatism in the NE Japan arc for the last 25 Myr : Constraints from geochemistry. (2006)
  • Author(s): Hanyu, T., Tatsumi, Y., Nakai, S., Chang, Q., Miyazaki, T., Sato, K., Tani, K., Shibata, T., Yoshida, T.
  • Journal Title: Geochem. Geophys. Geosyst. 7
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Accurate U-Th Radioactive Disequilibrium Analyses of Carbonate Rock Samples Using Commercially Available U and Th Reagents and Multi-Collector ICP-MS. (2006)
  • Author(s): Watanabe, Y., Nakai, S.
  • Journal Title: Microchim Acta. 156 Pages: 289-295
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] U-Th radioactive disequilibrium analyses for JCp-1, coral reference distributed by the Geological Survey of Japan (2006)
  • Author(s): Watanabe, Y., Nakai, S.
  • Journal Title: Geochem. J. 40 Pages: 537-541
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Application of X-ray absorption near-edge structure (XANES) using bent crystal analyzer to speciation of trace Os in iron meteorites. (2006)
  • Author(s): Takahashi, Y., Uruga, T. Tanida, H. Terada, Y. Nakai, S., Shimizu, H.
  • Journal Title: Anal. Chim. Acta 558 Pages: 332-336
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Modified ion exchange separation for tungsten isotopic measurements from kimberlite samples using multi-collector inductively coupled plasma mass spectrometry. (2006)
  • Author(s): Sahoo, Y., Nakai, S., Ali, A.
  • Journal Title: Analyst. 131 Pages: 434-439
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Modified ion exchange separation for tungsten isotopic measurements from kimberlite samples using multi-collector inductively coupled plasma mass spectrometry (2006)
  • Author(s): Sahoo, Y, Nakai, S., Ali, A.
  • Journal Title: Analyst 131 Pages: 434-439
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Application of X-ray absorption near-edge structure (XANES) using bent crystal analyzer to speciation of trace Os in iron meteorites (2006)
  • Author(s): Takahashi, Y., Uruga, T. Tanida, H. Terada, Y. Nakai, S., Shimizu, H.
  • Journal Title: Anal. Chim. Acta 558 Pages: 332-336
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] U-Th radioactive disequilibrium analyses for JCp-1, coral reference distributed by the Geological Survey of Japan (2006)
  • Author(s): Watanabe, Y., Nakai, S.
  • Journal Title: Geochem. J. 40(5) Pages: 537-541
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Accurate U-Th Radioactive Disequilibrium Analyses of Carbonate Rock Samples Using Commercially Available U and Th Reagents and Multi-Collector ICP-MS (2006)
  • Author(s): Watanabe, Y., Nakai, S.
  • Journal Title: Microchim Acta 156 (3-4)
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Contribution of slab melting and slab dehydration to magmatism in the NE Japan arc for the last 25 Myr : Constraints from geochemistry (2006)
  • Author(s): Hanyu, T., Tatsumi, Y., Nakai, S., Chang, Q., Miyazaki, T., Sato, K., Tani, K., Shibata, T., Yoshida, T.
  • Journal Title: Geochem. Geophys. Geosyst. 7
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Element partitioning between transition-zone minerals and ultramafic melt under hydrous conditions (2006)
  • Author(s): Mibe, K., Orihashi, Y., Nakai, S., Fujii, T.
  • Journal Title: Geophys. Res. Lett. 33
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Modified ion exchange separation for tungsten isotopic measurements from kimberlite samples using multi-collector inductively coupled plasma mass spectrometry (2006)
  • Author(s): Sahoo, Y., Nakai, S., Ali, A.
  • Journal Title: Analyst 131 Pages: 434-439
• [Journal Article] U-Th radioactive disequilibrium analyses for JCp-1, coral reference distributed by the Geological Survey of Japan (2006)
  • Author(s): Watanabe, Y., Nakai, S.
  • Journal Title: Geochem.J. 40(5) Pages: 537-541
• [Journal Article] Accurate U-Th Radioactive Disequilibrium Analyses of Carbonate Rock Samples Using Commercially Available U and Th Reagents and Multi-Collector ICP-MS (2006)
  • Author(s): Watanabe, Y., Nakai, S.
  • Journal Title: Microchim Acta 156(3-4) Pages: 289-295
• [Journal Article] Contribution of slab melting and slabdehydration to magmatism in the NE Japan arc for the last 25 Myr : Constraints from geochemistry (2006)
  • Author(s): Hanyu, T., Tatsumi, Y., Nakai, S., et al.
  • Journal Title: Geochem. Geophys. Geosyst. 7
• [Journal Article] U-Th radioactive disequilibrium analyses for JCp-1,coral reference distributed by the Geological Survey of Japan (2006)
  • Author(s): Watanabe, Y., Nakai, S.
  • Journal Title: Geochem.J. 40(in press)
• [Journal Article] Deep-sea coral geochemistry : Implication for the vital effect. (2005)
  • Author(s): Shirai, K., Kusakabe, M., Nakai, S., Ishii, T., Watanabe, T., Hiyagon, H., Sano, Y.
  • Journal Title: Chem. Geol. 224 Pages: 212-221
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Hafnium isotope ratios of nine GSJ reference samples. (2005)
  • Author(s): Hanyu, T., Nakai, S., Tatuta, R.
  • Journal Title: Geochem. J. 39 Pages: 83-90
  • NAID: 10015512889
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Lithium, strontium, and neodymium isotopic compositions of oceanic island basalts in the Polynesian region : constraints on a Polynesian HIMU origin. (2005)
  • Author(s): Nishio, Y., Nakai, S., Kogiso, T., Barsczus, H. G.
  • Journal Title: Geochem. J. 39 Pages: 91-103
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Lithium, strontium, and neodymium isotopic compositions of oceanic island basalts in the Polynesian region : constraints on a Polynesian HIMU origin (2005)
  • Author(s): Nishio, Y., Nakai, S., Kogiso, T., Barsczus, H. G.
  • Journal Title: Geochemical Journal 39 Pages: 91-103
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Hafnium isotope ratios of nine GSJ reference samples (2005)
  • Author(s): Hanyu, T., Nakai, S., Tatuta, R.
  • Journal Title: 39 Pages: 83-90
  • NAID: 10015512889
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Deep-sea coral geochemistry : Implication for the vital effect (2005)
  • Author(s): Shirai, K., Kusakabe, M., Nakai, S., Ishii, T., Watanabe, T., Hiyagon, H., Sano, Y.
  • Journal Title: Chem. Geol. 224 Pages: 212-222
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Lithium, strontium, and neodymium isotopic compositions of oceanic island basalts in the Polynesian region : constraints in a Polynesian HIMU origin (2005)
  • Author(s): Nishio, Y., Nakai, S., Kogiso, T., Barsczus, H.G.
  • Journal Title: Geochemical Journal 39 Pages: 91-103
• [Journal Article] Hafnium isotope ratios of nine GSJ reference samples (2005)
  • Author(s): Hanyu, T., Nakai, S., Tatuta, R.
  • Journal Title: Geochemical Journal 39 Pages: 83-90
  • NAID: 10015512889
• [Journal Article] Deep-sea coral geochemistry : Implication for the vital effect (2005)
  • Author(s): Shirai, K., Kusakabe, M., Nakai, S., Ishii, T., Watanabe, T., Hiyagon, H., Sano, Y.
  • Journal Title: Chem.Geol. 224 Pages: 212-222
• [Journal Article] Prikhod'ko, V. S. and Arai, S. Intergranular trace elements in mantle xenoliths from Russian Far East : An example for mantle metasomatism by hydrous melt
  • Author(s): Yamamoto, J. Nakai, S., Nisimura, K., Kaneoka, I., Kagi, H., Sato, K. Okumura, T.
  • Journal Title: The Island Arc (in press)
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] W isotope compositions of oceanic islands basalts from French Polynesia and their meaning for core-mantle interaction
  • Author(s): Takamasa, A., Nakai, S., Sahoo, Y., Hanyu, T., Tatsumi, Y.
  • Journal Title: Chemical Geology 2009(印刷中(掲載確定))
• [Presentation] サモア・セントヘレナ火山試料のタングステン濃度と同位体比 (2008)
  • Author(s): 賞雅朝子, 中井俊一, Sahoo Yu Vin, 羽生毅, 川畑博
  • Organizer: 地球惑星科学連合2008年大会
  • Place of Presentation: 幕張メッセ国際会議場
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] 地球マントルのタングステン同位体比 (2008)
  • Author(s): 賞雅朝子, Sahoo Yu Vin, 中井俊一, 熊谷英憲, 海野進
  • Organizer: 地球惑星科学連合2008年大会
  • Place of Presentation: 幕張メッセ国際会議場
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] W isotope study of natrocarbonatites from Oldoinyo Lengai, Tanzania (2008)
  • Author(s): A. ALI, S. NAKAI, K. BELL, Y. SAHOO
  • Organizer: 18th Annual VM Goldschmidt Conference
  • Place of Presentation: Vancouver, Canada
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Tungsten isotopic investigation of Eoarchean terrestrial rocks with implications for mantle evolution (2008)
  • Author(s): T. IIZUKA, S. NAKAI, Y. V. SAHOO, T. HIRATA, A. TAKAMASA, S. MARUYAMA
  • Organizer: 18th Annual VM Goldschmidt Conference
  • Place of Presentation: Vancouver, Canada
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] W isotope compositions and concentration of oceanic island basalts (2008)
  • Author(s): A. Takamasa, S. Nakai, Y. V. Sahoo, T. Hanyu, H. Kawabata, Y. Tatsumi
  • Organizer: 18th Annual VM Goldschmidt Conference
  • Place of Presentation: Vancouver, Canada
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Tungsten Isotopic composition in Earth's rock samples : Constrains on the mantle evolution (2008)
  • Author(s): 賞雅朝子, 中井俊一, Sahoo Yu Vin, 羽生毅, 川畑博, 谷水雅治
  • Organizer: 2008年度日本地球化学会第55回年会
  • Place of Presentation: 東京大学駒場キャンパス
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] フォルステライト多結晶体におけるPt固溶度と拡散 : コア-マントル相互作用の素過程 (2008)
  • Author(s): 賞雅朝子, 平賀毅彦, 中井俊一, 小泉早苗, 大橋直樹, 佐野聡
  • Organizer: 2008年度日本地球化学会第55回年会、東京
  • Place of Presentation: 東京大学駒場キャンパス
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Investigations on core-mantle interaction with a tungsten isotopic tracer. (2007)
  • Author(s): 賞雅朝子, 中井俊一, Sahoo Yu Vin, 羽生毅, Tejada Marissa
  • Organizer: 地球惑星科学連合2007年大会
  • Place of Presentation: 幕張メッセ国際会議場
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] 海洋島玄武岩と海台試料のタングステン濃度と同位体比の地球化学 (2007)
  • Author(s): 賞雅朝子, 中井俊一, Sahoo Yu Vin, 羽生毅, Tejada Marissa, 巽好幸, 佐野貴司
  • Organizer: 2007年度日本地球化学会第54回年会
  • Place of Presentation: 岡山大学
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] タングステン濃度とタングステン同位体比の地球化学的研究 (2007)
  • Author(s): 賞雅朝子, 中井俊一, Sahoo Yu Vin, 熊谷英憲, 海野進
  • Organizer: Inter Ridge Japan 研究集会
  • Place of Presentation: 東京大学海洋研究所
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] サンプル粉砕処理におけるコンタミネーション-微量元素組成への影響 (2007)
  • Author(s): 賞雅朝子, 平賀岳彦, 安田敬, 中井俊一
  • Organizer: 質量分析学会同位体比部会
  • Place of Presentation: 北海道定山渓
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] グラムレベル試料のタングステン分離方法の開発 (2007)
  • Author(s): 賞雅朝子, Sahoo Yu Vin, 中井俊一
  • Organizer: 質量分析学会同位体比部会
  • Place of Presentation: 北海道定山渓
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Tungsten abundance and isotopic compositions of Ocean Island Basalts, an Oceanic Plateau, MORB samples : in search for a core-mantle interaction (2007)
  • Author(s): A. Takamasa, S. Nakai, et al.
  • Organizer: 2007 AGU Fall Meeting
  • Place of Presentation: San Francisco, USA
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] 消滅核種182Hf, 107Pdを用いたコアーマントル相互作用の検証の試み (2006)
  • Author(s): 中井俊一, サフー ユービン, 賞雅朝子, アリ アルシャット
  • Organizer: 日本地球化学会年会
  • Place of Presentation: 日本大学文理学部
  • Year and Date: 2006-09-14
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] 南太平洋海洋島玄武岩のタングステン同位体比測定 : コア-マントル相互作用の検証 (2006)
  • Author(s): 賞雅朝子, 中井俊一, サフーユービン, 羽生毅
  • Organizer: 日本地球化学会年会
  • Place of Presentation: 日本大学文理学部
  • Year and Date: 2006-09-13
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] 南ポリネシア・海洋島玄武岩のタングステンと鉛の同位体比測定-コア-マントル相互作用の検証 (2006)
  • Author(s): 賞雅朝子, 中井俊一, 羽生毅
  • Organizer: 日本地球惑星科学連合2006年大会
  • Place of Presentation: 幕張メッセ国際会議場
  • Year and Date: 2006-05-17
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Tungsten abundance and isotopic compositions of Ocean Island Basalts, an Oceanic Plateau, MORE samples : in search for a core-mantle interaction
  • Author(s): A. Takamasa, S. Nakai, Y. V. Sahoo, T. Hanyu, Y. Tatsumi, M. Tejada, H. Kumagai, S. Umino, T. Sano
  • Organizer: 2007 AGU Fall Meeting. (Eos Transactions, AGU, 88 (52), Fall Meet. Supplement)
  • Place of Presentation: San Francisco, USA
  • Description: 「研究成果報告書概要(欧文)」より