| 西北冰洋楚科奇海台南部08P23孔氧同位素3期以来的古海洋与古气候记录 |
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| 引用本文： | 章陶亮,王汝建,肖文申,陈志华,陈建芳,程振波,孙烨忱.西北冰洋楚科奇海台南部08P23孔氧同位素3期以来的古海洋与古气候记录[J].海洋学报(英文版),2015,34(3):68-75. |
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| 作者姓名： | 章陶亮 王汝建 肖文申 陈志华 陈建芳 程振波 孙烨忱 |
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| 作者单位： | 同济大学海洋地质国家重点实验室, 上海, 20092,同济大学海洋地质国家重点实验室, 上海, 20092,同济大学海洋地质国家重点实验室, 上海, 20092,中国国家海洋局第一海洋研究所, 青岛, 266061,国家海洋局第二海洋研究所, 杭州, 310012,中国国家海洋局第一海洋研究所, 青岛, 266061,同济大学海洋地质国家重点实验室, 上海, 20092 |
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| 基金项目： | The National Natural Science Foundation of China under contract Nos 41030859,41211120173,CHINARE2015-03-02 and IC201105;the Geological Investigation Project of China Geological Survey Nos 12120113006200 and 1212011120044 |
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| 摘 要： | Multiproxy investigations have been performed on Core 08P23 collected from the Chukchi Plateau, the western Arctic Ocean, during the Third Chinese National Arctic Expedition. The core was dated back to Marine Isotope Stage(MIS) 3 by a combination of Accelerator Mass Spectrometric(AMS) carbon-14 dating and regional core correlation. A total of five prominent ice-rafted detritus(IRD) events were recognized in MIS 2 and MIS 3. The IRD sources in MIS 3 are originated from vast carbonate rock outcrops of the Canadian Arctic Archipelago and clastic quartz in MIS 2 may have a Eurasian origin. Most δ18O and δ13C values of Neogloboquadrina pachyderma(sinistral)(Nps) in Core 08P23 are lighter than the average values of surface sediments. The lighter δ18O and δ13C values of Nps in the two brown layers in MIS 1 and MIS 3 were resulted from meltwater events; and those in the gray layers in MIS 3 were caused by the enhanced sea ice formation. The δ18O values varied inversely with δ13C in MIS 2 indicate that the study area was covered by thick sea ice or ice sheet with low temperature and little meltwater, which prevented the biological productivity and sea-atmosphere exchange, as well as water mass ventilation. The covaried light values of δ18O and δ13C in MIS 1 and MIS 3 were resulted from meltwater and/or brine injection.
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| 关 键 词： | Chukchi Plateau western Arctic Ocean Marine Isotope Stage 3 ice rafted detritus events oxygen and carbon isotope water mass changes |
| 收稿时间： | 2014/4/10 0:00:00 |
| 修稿时间： | 2014/10/16 0:00:00 |
Ice rafting history and paleoceanographic reconstructions of Core 08P23 from southern Chukchi Plateau, western Arctic Ocean since Marine Isotope Stage 3 |
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| ZHANG Taoliang,WANG Rujian,XIAO Wenshen,CHEN Zhihu,CHEN Jianfang,CHENG Zhenbo and SUN Yechen.Ice rafting history and paleoceanographic reconstructions of Core 08P23 from southern Chukchi Plateau, western Arctic Ocean since Marine Isotope Stage 3[J].Acta Oceanologica Sinica,2015,34(3):68-75. |
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| Authors: | ZHANG Taoliang WANG Rujian XIAO Wenshen CHEN Zhihu CHEN Jianfang CHENG Zhenbo and SUN Yechen |
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| Institution: | 1.State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China2.The First Institute of Oceanography, State Oceanic Adiministration, Qingdao 266061, China3.The Second Institute of Oceanography, State Oceanic Adiministration, Hangzhou 310012, China |
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| Abstract: | Multiproxy investigations have been performed on Core 08P23 collected from the Chukchi Plateau, the western Arctic Ocean, during the Third Chinese National Arctic Expedition. The core was dated back to Marine Isotope Stage (MIS) 3 by a combination of Accelerator Mass Spectrometric (AMS) carbon-14 dating and regional core correlation. A total of five prominent ice-rafted detritus (IRD) events were recognized in MIS 2 and MIS 3. The IRD sources in MIS 3 are originated from vast carbonate rock outcrops of the Canadian Arctic Archipelago and clastic quartz in MIS 2 may have a Eurasian origin. Most δ18O and δ13C values of Neogloboquadrina pachyderma (sinistral) (Nps) in Core 08P23 are lighter than the average values of surface sediments. The lighter δ18O and δ13C values of Nps in the two brown layers in MIS 1 and MIS 3 were resulted from meltwater events; and those in the gray layers in MIS 3 were caused by the enhanced sea ice formation. The δ18O values varied inversely with δ13C in MIS 2 indicate that the study area was covered by thick sea ice or ice sheet with low temperature and little meltwater, which prevented the biological productivity and sea-atmosphere exchange, as well as water mass ventilation. The covaried light values of δ18O and δ13C in MIS 1 and MIS 3 were resulted from meltwater and/or brine injection. |
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| Keywords: | Chukchi Plateau western Arctic Ocean Marine Isotope Stage 3 ice rafted detritus events oxygen and carbon isotope water mass changes |
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