| Project/Area Number |
20540453
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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 |
Stratigraphy/Paleontology
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| Research Institution | Ibaraki University |
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Principal Investigator |
OKADA Makoto Ibaraki University, 理学部, 准教授 (00250978)
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| Project Period (FY) |
2008 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
|
| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2010: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2009: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2008: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Keywords | 層序 / 古地磁気学 / 古海洋学 / 房総半島 / 房総半島南端 / 千倉層群 / 酸素同位体層序 / 古地磁気層序 / 鮮新統-更新統境界 / 更新統 / 鮮新統境界 / 古海洋 / 古地磁気 |
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| Research Abstract |
Our research group has reconstructed magnetostratigraphy and oxygen isotopic stratigraphy for the Plio-Pleistocene Chikura Group distributed on the southern Boso Peninsula, Japan. The results indicate that, the studied sequence is comparable from the upper Gauss chronozone including the Kaena sub-chronozone to the lower Matuyama chronozone, and the oxygen isotopic curve is correlated between from MIS G16 through 93, which are derived by the LR04 standard curve. We define 15 tephra layers, named as from Okr1 to Okr15, in which 8 layers are identified as key tephra layers widely distributed in central Japan by means of lithologies, mineral asembrages and chemical compositions of glass shards. The Matuyama/Gauss boundary at this studied sequence is situated on MIS 103, not on MIS 104 that is described in the LR04 time scale.
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