Calculated reservoir ages using paired AMS ^<14>C and MC-ICP-MS U-Th dating of foraminifera test, implications for paleoceanography

使用配对 AMS ^<14>C 和 MC-ICP-MS U-Th 定年有孔虫测试计算储层年龄，对古海洋学的影响

• 批准号: 17540443
• 负责人: MURAYAMA Masafumi
• 金额: $ 2.37万
• 依托单位: Kochi University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17540443/
• 关键词: Geochronology; Accelerator Mass Spectrometory; Radiocarbon; U-Th age; Reservoir effect; MC-ICP-MS; MC-TCP-MS

AMS14C age of planktonic foraminifera from core samples must be corrected for differences between the 14C age of surface water and the contemporaneous atmosphere prior to calculation of a calendar age. This is because the waters of the deep ocean are out of equilibrium with respect to the atmosphere causing marine carbon-containing material to appear older than material formed in equilibrium with the atmosphere. Reservoir ages have been calculated using paired AMS 14C and MC-ICP-MS U-Th dating of small amounts of foraminifera tests from the eastern equatorial Pacific. The results show a marked reduction in reservoir age during 50 kyrs.

必须在计算日历年龄之前的14c地表水与同时气氛之间的差异，以纠正核心样品的浮游有孔虫的AMS14C年龄。这是因为深海的水相对于导致海洋碳含量的材料的大气而超出了平衡。已经使用配对的AMS 14C和MC-ICP-MS U-少量有孔虫测试的储层年龄计算出来。结果表明，在50千摩尔语期间，储层年龄显着降低。

项目成果

高知県仁淀村に分布する鳥巣石灰岩のストロンチウム同位体年代

高知县仁淀村分布的鸟栖石灰岩的锶同位素年龄

• 发表时间: 2005
• 期刊: 地質学雑誌 111
• 作者: 白石史人;早坂康隆;高橋嘉夫;谷水雅治;石川剛志;松岡淳;村山雅史;狩野彰宏
• 通讯作者: 狩野彰宏

Geochronology and paleoceanographic history of Quaternary sediments from southwestern part of Pacific-Antarctic Ridge, the Ross Sea, Antarctica.

南极洲罗斯海太平洋-南极海脊西南部第四纪沉积物的年代学和古海洋学历史。

• 发表时间: 2006
• 作者: Murayama;M.;Yagi;Y.;Mishima;T.;Horikawa;K.;Sagawa;T.;Kodama;K.;Kato;Y.;and Minagawa
• 通讯作者: and Minagawa

Oceanic frontal system oscillations in the Australian sector of the southern ocean during the late Quaternary

第四纪晚期南大洋澳大利亚区的海洋锋面系统振荡

• 发表时间: 2007
• 作者: Ikehara;M.;Hatakeyama;E.;Nishigawa;M. and Muravama;M.
• 通讯作者: M.

Core correlations of three sites straddling the equator in the eastern Pacific

东太平洋横跨赤道的三个地点的核心相关性

• 发表时间: 2005
• 作者: Murayama;M. ;et. al.
• 通讯作者: et. al.

Standing stock of deep-sea metazoan meiofauna in the Sulu Sea and adjacent areas.

苏禄海及邻近地区的深海后生动物小型底栖动物群。

• 发表时间: 2007
• 期刊: Deep Sea Research II 54
• 作者: Shimanaga;M.;Nomaki;H.;Suetsugu;K.;Murayama M.;Kitazato;H.
• 通讯作者: H.