2009 Fiscal Year Final Research Report
New developments in geo-thermometry based on quantitative oxygen analysis using a microprobe to estimate iron oxidation ratio
| Project/Area Number |
19540503
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Petrology/Mineralogy/Science of ore deposit
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| Research Institution | Nagoya University |
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Principal Investigator |
WALLIS R.simon Nagoya University, 大学院・環境学研究科, 准教授 (30263065)
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| Co-Investigator(Kenkyū-buntansha) |
KATO Takenori 年代測定総合研究センター, 准教授 (90293688)
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| Project Period (FY) |
2007 – 2009
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| Keywords | 酸素 / EPMA / 微小領域分析 / 岩石学温度計 |
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| Research Abstract |
Uncertainty in the oxidation state of iron in pyroxene leads to significant uncertainties in estimating the temperature of the inner earth. Oxygen is the only anion in pyroxene and assuming electrical balance, accurate measurements of cation contents allow the iron oxidation ratio to be estimated. Oxygen measurements using EPMA were optimized by examining the analyzing crystal, sample surface, ways of identifying the background, and appropriate correction factors. We are now able to determine the weight percentage of oxygen to within one percent.
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[Journal Article] Age and early metamorphic history of the Sanbagawa belt: Lu-Hf and P-T constraints from the Western Iratsu eclogite.2009
Author(s)
Endo, S., Wallis, S., Hirata, T. Anczkiewicz, R., Platt, J., Thirlwall, M., Asahara, Y.
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Journal Title
Journal of Metamorphic Geology 27
Pages: 371-384
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[Journal Article] Plate movements, ductile deformation and geochronology of theSanbagawa belt, SW Japan: tectonic significance of 89-88 Ma Lu-Hf eclogite ages.2009
Author(s)
Wallis, S.R., Anczkiewicz, R., Aoya, M., Platt, J.P., Thirlwall, M., Hirata, T.
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Journal Title
Journal of Metamorphic Geology 27
Pages: 93-105
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