Establishment of a standard high-resolution Plio-Pleistocene stratigraphy using a detrital marine sequence distributed in the Boso Peninsula, Japan.

利用分布在日本房总半岛的碎屑海洋序列建立标准高分辨率上里奥-更新世地层学。

• 批准号: 20540453
• 负责人: OKADA Makoto
• 金额: $ 2.83万
• 依托单位: Ibaraki University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20540453/
• 关键词: 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

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.

我们课题组对分布在日本房总半岛南部的上里奥-更新世千仓群进行了磁性地层和氧同位素地层重建。结果表明，所研究的序列从上高斯时带（包括Kaena亚时带）到下松山时带具有可比性，并且氧同位素曲线在由LR04标准曲线导出的MIS G16至93之间具有相关性。我们定义了15个火山灰层，命名为Okr1至Okr15，其中8层通过岩性、矿物组合和玻璃碎片的化学成分被确定为日本中部广泛分布的关键火山灰层。该研究序列的松山/高斯边界位于 MIS 103 上，而不是 LR04 时间尺度中描述的 MIS 104 上。

项目成果

南房総に分布する鮮新-更新統千倉層群の酸素同位体層序

分布于南房总的上新世-更新世千仓群的氧同位素地层

• 发表时间: 2010
• 作者: Ohno;M.;Murakami;F.;Komatsu;F.;Guyodo;Y.;Acton;G.;Kanamatsu;T.;Evans;H.F.;Nanayama;F.;所佳実・松田瞳・内田剛行・岡田誠;金松敏也;岡田誠・所佳実・松田瞳・内田剛行
• 通讯作者: 岡田誠・所佳実・松田瞳・内田剛行

南房総千倉層群布良層上部における酸素同位体層序

南房总千仓群富拉组上部氧同位素地层

• 发表时间: 2011
• 作者: Yamazaki;T.;Kanamatsu;T.;Mizuno;S.;Hokanishi;N.;Gaffar;E.Z.;所佳実・岡田誠
• 通讯作者: 所佳実・岡田誠