| Natural thermoluminescence of fossil foraminiferals as a potential proxy for deep-sea temperature changes |
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| 作者姓名： | LIU Haisheng FANG Nianqiao HOU Shengli CHEN Yexun |
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| 作者单位： | LIU Haisheng（Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing 100084,China） ;
FANG Nianqiao（China University of Geoseiences,Beijing 100083,China） ;
HOU Shengli（China University of Geoseiences,Beijing 100083,China） ;
CHEN Yexun（China University of Geoseiences,Beijing 100083,China） ; |
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| 摘 要： | Foraminiferal shells from two piston cores separately located at the Ninetyeast Ridge and the Bengal Fan of the Indian Ocean were selected and purified for measurements of natural thermoluminescence （NTL） intensity by a high precision thermoluminescence meter （RGD-3）. Variations of the NTL intensity along the two core sequences both spanning the last two glacial--interglacial cycles displayed a strong, identical signal of the global ice volume cycles, which matched well with their corresponding oxygen isotope data. As higher NTL intensity occurred within interglacial periods and changes in an NTL signal were most likely influenced by the temperature of ambient seawater in which the planktonic foraminiferal shells long existed, the NTL signal could be considered as a potential proxy for orbital scale temperature changes of bottom seawater in the tropical Indian Ocean.
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| 关 键 词： | 热发光 有孔虫目 化石 深海温度变化 冰河期-间冰期循环 印度洋 |
| 收稿时间： | 2006/8/29 0:00:00 |
| 修稿时间： | 2007/6/26 0:00:00 |
Natural thermoluminescence of fossil foraminiferals as a potential proxy for deep-sea temperature changes |
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| LIU Haisheng,FANG Nianqiao,HOU Shengli,CHEN Yexun.Natural thermoluminescence of fossil foraminiferals as a potential proxy for deep-sea temperature changes[J].Acta Oceanologica Sinica,2008,27(2):30-34. |
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| Authors: | LIU Haisheng FANG Nianqiao HOU Shengli and CHEN Yexun |
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| Institution: | 1.Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China2.China University of Geosciences, Beijing 100083, China |
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| Abstract: | Foraminiferal shells from two piston cores separately located at the Ninetyeast Ridge and the Bengal Fan of the Indian Ocean were selected and purified for measurements of natural thermoluminescence (NTL) intensity by a high precision thermoluminescence meter ( RGD-3 ).Variations of the NTL intensity along the two core sequences both spanning the last two glacial-interglacial cycles displayed a strong,identical signal of the global ice volume cycles,which matched well with their corresponding oxygen isotope data.As higher NTL intensity occurred within interglacial periods and changes in an NTL signal were most likely influ-enced by the temperature of ambient seawater in which the planktonic foraminiferal shells long existed,the NTL signal could be considered as a potential proxy for orbital scale temperature changes of bottom seawater in the tropical Indian Ocean. |
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| Keywords: | natural thermolumineseence foraminiferal glacial-interglacial cycle northeastern Indian Ocean |
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