2005 Fiscal Year Final Research Report Summary
Establishment of high-accuracy dating method of tiny zircon (<10μm) : Implication for age determination of the oldest rock on the Earth
| Project/Area Number |
15340192
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Geochemistry/Astrochemistry
|
|---|
| Research Institution | Okayama University |
|---|
Principal Investigator |
NAKAMURA Eizo Okayama University, Institute for the Study of the Earth's Interior, Professor, 地球物質科学研究センター, 教授 (80201672)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
MAKISHIMA Akio Okayama University, Institute for the Study of the Earth's Interior, Professor, 地球物質科学研究センター, 教授 (70219301)
MORIGUTI Takuya Okayama University, Institute for the Study of the Earth's Interior, Associate professor, 地球物質科学研究センター, 助教授 (70304342)
KOBAYASHI Katsura Okayama University, Institute for the Study of the Earth's Interior, Associate professor, 地球物質科学研究センター, 助教授 (20325129)
|
|---|
| Project Period (FY) |
2003 – 2005
|
| Keywords | High mass resolution secondary ion mass spectrometer / zircon / standard material / U-Pb age dating / TIMS / Advanced high spatial resolution optical microscope / spatial resolution / thin section |
|---|
| Research Abstract |
In-situ age dating of zircon provides us the important information to understand complicated geological events, and the purpose of this research is to improve the new age dating method using high mass resolution ion probe, Cameca ims-1270. One of the key devices to establish this research project was high-spatial resolution optical microscope for the Camaca ion probe. The authors developed the new optical microscope system (PMLOpt-1) jointly with OLIMPUS Co.Ltd, and installed the system in our ion probe system. As a result, the expected optical resolution, less than 4μm, has been established, on in-situ observation by ion probe analysis. The obtained special resolution by this system is comparable with that by SEM-EDX and CL analysis. Combining observation by the newly installed optical microscope and "Visual Stage" system, which is database system handling the target's coordinates on the sample mount, we could very precise age data based on the detail description of sample. The authors also had been developed the precise in-situ age dating method using the reliable zircon standards, which had been confirmed by the conventional TIMS technique. These high-quality zircon standards confirm the accuracy of age data by the ion probe analysis. The authors applied the developed technique for the zircon mainly from metamorphic rock suites. Typical grain size of zircon in metamorphic rock is less than several tens micrometer, therefore, the high-spatial resolution dating, we developed, is essential. Analytical results with other geochemical discussions are published and/or preparing for the publication.
|
Research Products
(49 results)
-
-
-
-
-
-
-
-
-
[Journal Article] In-situ U-Pb SIMS dating and trace element (EPMA) composition of zircon from a granodiorite porphyry in the Wushan copper deposit, China.2005
Author(s)
Ding, X., Jiang, S.-Y., Zhao, K.-D., Nakamura, E., Kobayashi, K., Ni, P., Gu, L.-X., Jiang, Y.-H.
-
Journal Title
Mineralogy and Petrology
Pages: doi: 10.1007/s00710-005-0093-5
Description
「研究成果報告書概要(和文)」より
-
-
-
-
-
-
[Journal Article] In-situ U-Pb SIMS dating and trace element (EPMA) composition of zircon from a granodiorite porphyry in the Wushan copper deposit, China2005
Author(s)
Ding, X., Jiang, S.-Y., Zhao, K.-D., Nakamura, E.Kobayashi, K., Ni, P., Gu, L.-X., Jiang, Y.-H.
-
Journal Title
Mineralogy and Petrology
Pages: doi:10.1007/s00710-005-0093-5
Description
「研究成果報告書概要(欧文)」より
-
-
-
-
-
-
[Journal Article] Lithium, Boron and Lead Isotope Systematics of Glass Inclusions in Olivines from Hawaiian Lavas : Evidence for Recycled Components in the Hawaiian Plume.2004
Author(s)
Kobayashi, K., Tanaka, R., Moriguti, T., Shimizu, K., Nakamura, E.
-
Journal Title
Chemical Geology 212
Pages: 143-161
Description
「研究成果報告書概要(和文)」より
-
-
-
[Journal Article] Ultrahigh-pressure metabasaltic garnets as probes into deep subduction-zone cycling2004
Author(s)
King, R.L., Bebout, G.E., Kobayashi, K., Nakamura, E., van der Klauw, S.N.G.C
-
Journal Title
Geochemistry, Geophysics, Geosystems 5
Pages: Doi:10.1029/2004GC000746
Description
「研究成果報告書概要(和文)」より
-
-
-
[Journal Article] Lithium, Boron and Lead Isotope Systematics of Glass Inclusions in Olivines from Hawaiian Lavas : Evidence for Recycled Components in the Hawaiian Plume2004
Author(s)
Kobayashi, K., Tanaka, R., Moriguti, T., Shimizu, K., Nakamura, E.
-
Journal Title
Chemical Geology 212
Pages: 143-161
Description
「研究成果報告書概要(欧文)」より
-
-
[Journal Article] Ultrahigh-pressure metabasaltic gernets as probes into deep subduction-zone cycling2004
Author(s)
King, R.L., Bebout, G.E., Kobayashi, K., Nakamura, E., van der Klauw, S.N.G.C
-
Journal Title
Geochemistry, Geophysics, Geosystems Vol.5,No.12
Pages: DOI10.1029/2004GC000746
Description
「研究成果報告書概要(欧文)」より
-
-
-
-
-
[Journal Article] Comprehensive geochemical analysis of small amounts (<100mg) of extraterrestrial samples for the analytical competition related to the sample return mission MUSES-C2003
Author(s)
Nakamura, E., Makishima, A., Moriguti, T., Kobayashi, K., Sakaguchi, C., Yokoyama, T., Tanaka, R., Kuritani, T., Takei, H.
-
Journal Title
Inst. Space Astronaut. Sci. Rep. SP 16
Pages: 49-101
Description
「研究成果報告書概要(和文)」より
-
-
-
-
-
-
[Journal Article] Comprehensive geochemical analyses of small amounts (< 100mg) of extraterrestrial samples for the analytical competition related to the sample return mission MUSES-C2003
Author(s)
Nakamura, E., Makishima, A., Moriguti, T., Kobayashi, K., Sakaguchi, C., Yokoyama, T., Tanaka, R., Kuritani, T., Takei, H.
-
Journal Title
Inst.Space Astronaut.Sci.Rep.SP. 16
Pages: 49-101
Description
「研究成果報告書概要(欧文)」より
-
-
-
-
-
-
-
-
-
