2005 Fiscal Year Final Research Report Summary
Dating of pre-solar material using La-Ce and Sm-Nd decay systems
| Project/Area Number |
13853001
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| Research Category |
Grant-in-Aid for Scientific Research (S)
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| Allocation Type | Single-year Grants |
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| Research Field |
地球化学
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| Research Institution | Nagoya University |
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Principal Investigator |
TANAKA Tsuyoshi Nagoya University, Graduate School of Environmental Studies, Professor, 大学院・環境学研究科, 教授 (00236605)
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| Co-Investigator(Kenkyū-buntansha) |
YAMAMOTO Koshi Nagoya University, Graduate School of Environmental Studies, Assoc.Prof., 大学院・環境学研究科, 助教授 (70183689)
MINAMI Masayo Nagoya University, Center for Chronological Research, Assoc.Prof., 年代測定総合研究センター, 助教授 (90324392)
MIMURA Koichi Nagoya University, Graduate School of Environmental Studies, Assoc.Prof., 大学院・環境学研究科, 助教授 (80262848)
ASAHARA Yoshihiro Nagoya University, Graduate School of Environmental Studies, Assist.Prof., 大学院・環境学研究科, 助手 (10281065)
TANIMIZU Masaharu Japan Marine-Earth Sci. & Tech.Studies, Researcher, 技術研究員 (20373459)
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| Project Period (FY) |
2001 – 2005
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| Keywords | La-Ce decay system / Sm-Nd decay system / Meteorite / Rare earth elements / Mass spectrometry / Cerium anomaly / Pre-solar events / Radiometric age |
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| Research Abstract |
1)The finding of six CAI inclusions with Ce anomaly from Allende meteorite.
Ninety CAI inclusions from Allende meteorite were analyzed for REE by INAA method. The CAI was classified into three groups by their REE abundance pattern. Six inclusions among them were found to have negative Ce anomaly.
2)The advancement of the mass spectrometry for trace amount of Ce-Nd-Sr radiogenic isotopes acc urately.
The analytical results for repeated analyses are 0.0225889±0.0000013 and 0.0168810±0.0000030 for ^<138>Ce/^<142>Ce and ^<136>Ce/^<142>Ce, respectively.
3)The development of Rb-Sr isochron dating technique using the single mineral grain.
This method enables us to draw an isochron by Rb/Sr heterogeneity reside inside the mineral grain. A K-feldspar of a dyke from Gifu Prefecture shows magmatic event and a chlorite in the same rock shows an alteration date.
4)Many applications of ^<138>La-^<138>Ce,^<147>Sm-^<143>Nd,^<87>Rb-^<87>Sr isotope systematics to various geochemistry and cosmochemistry.
Ce and Nd isotopes and REE pattern of Barberton sedimentary rocks were examined. Ce anomaly found in the chert was regarded as a proof of air oxygen in atmosphere. The new data indicate that the Ce anomaly was formed at 1.1Ga.
5)The development of Sm isotopes measurement technique using double spikes and its application Our technique achieved to measure Sm isotope variations with accuracy of 0.03‰/amu(1SD) using ^<150>Sm-^<154>Sm double spikes.
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Research Products
(54 results)
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[Journal Article] Studies on elemental distribution and circulation in view of multielement analysis of Eastern part of Aichi Preefecture.2004
Author(s)
Tanaka, T., Minami, M., Yamamoto, K., Asahara, Y., Mimura, K., Senda, R., Shibata, S., Takebe, K., Tanaka, K.Hayashi, T., Kojima, H.
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Journal Title
Heisei 15 th Report of Atomic Energy Usage no.43
Pages: 51-56
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Neutron activation analysis using an automated γ-ray detection system at Radioisotope Center, Nagoya University.2001
Author(s)
Shibata, S., Tanaka, T., Minami, M., Senda, R., Takebe, K., Kachi, T., Kondoh, M., Oda, S., Hayashi, T., Nishizawa, K., Kojima, H.
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Journal Title
Annual Report of Nagoya University Museum vol.17
Pages: 15-32
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Studies on elemental distribution and cycles in geosphere using multisample and multielements analyses.2001
Author(s)
Shibata, S., Tanaka, T., Minami, M., Senda, R., Takebe, K., Kachi, T., Kondoh, M., Oda, S., Hayashi, T., Nishizawa, K., Kojima, H.
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Journal Title
Heisei 12th Report of Atomic energy usage no.40
Pages: 118-136
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Geochemical mapping as a fruitful field training for geosciences2001
Author(s)
Tanaka, T., Kawabe, I., Yamamoto, K., Mimura, K., Asahara, Y., Minami, M.
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Journal Title
Chisitsu News vol.558
Pages: 41-47
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Application of Sr isotope to geochemical mapping and provenance analysis : the case of Aichi Prefecture, central Japan.
Author(s)
Asahara, Y., Ishiguro, H., Tanaka, T., Yamamoto, K., Mimura, K., Minami, M., Yoshida, H.
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Journal Title
Applied Geochemistry Vol.21
Pages: 419-436
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Database for geochemical mapping of the northeastern areas of Aichi Prefecture, central Japan -XRF major element data of stream sediments collected in 1994 to 2004- Jour.
Author(s)
Minami.M., Tanaka, T., Yamamoto, K., Mimura, K., Asahara, Y., Takeuchi, M., Yoshida, H., Yogo, S., Inayoshi, M.
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Journal Title
Earth Planet.Sci.Nagoya Univ. vol.52
Pages: 25-67
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] He-Ar and Nd-Sr isotopic compositions of ultramafic xenoliths and host alkali basalts from the Korean peninsula.
Author(s)
Kim, K.H., Nagao, K., Tanaka, T., Sumino, H., Nakamura, T., Okuno, M., Lock, J.B., Youn, J.S., Song, J.
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Journal Title
Geochemical Jour. vol.39
Pages: 341-356
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Early Cretaceous radiolarians from the Indus suture zone, Ladakh, northern India. Proceedings of the Seventh Radiolarian Symposium.
Author(s)
Kojima, S., Ahmad, T., Tanaka, T., Bagati, T.N., Mishra, M., Kumar, R., Islam, R., Khanna, P.
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Journal Title
News of Osaka Micropaleontologists Special Volume, No.12
Pages: 257-270
Description
「研究成果報告書概要(欧文)」より
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[Book] Cahapter 1-6 of Source Book of Geoenvironmental Studies, Geochemical Maps2005
Author(s)
Tanaka, T., Yamamoto, K., Minami, M., Mimura, K., Asahara, Y., Yoshida, E., Inayoshi, M.
Total Pages
32-35
Publisher
Fujiwara Shoten, Tokyo
Description
「研究成果報告書概要(欧文)」より
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