极地研究

极地研究 ›› 1997, Vol. 8 ›› Issue (1-English): 37-47.

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Environmental magnetic measurements of marine sediments from Antarctica: implications to paleoclimate changes during the past 15 ka

 Hou Hongming1, Wang Baogui1, Tang Xianzan1, Luo Youlang1 and Zheng Honghan2   

  1. 1South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China 2Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, Chinia
  • 出版日期:1947-03-30 发布日期:1947-03-30
  • 通讯作者: Hou Hongming, now stud as a Ph. D. student in Guangzhou Institute of Geochemistry, CAS.
  • 基金资助:

    This research work was supported by the State Antarctic Committee of China and Director scientific foundation of South China Sea Institute of Oceanology, CAS.

Environmental magnetic measurements of marine sediments from Antarctica: implications to paleoclimate changes during the past 15 ka

Hou Hongming1, Wang Baogui1, Tang Xianzan1, Luo Youlang1 and Zheng Honghan2   

  1. 1South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China 2Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, Chinia
  • Online:1947-03-30 Published:1947-03-30
  • Contact: Hou Hongming, now stud as a Ph. D. student in Guangzhou Institute of Geochemistry, CAS.
  • Supported by:

    This research work was supported by the State Antarctic Committee of China and Director scientific foundation of South China Sea Institute of Oceanology, CAS.

PDF (PC)

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摘要：

In this paper, authors report some results obtained from systematic rock magnetic measurements on Core NP95-1 and Core NG93-1 , which were collected from the Prydz Bay, Eastern Antarctica and Great Wall Bay (Maxwell Bay), Western Antarctica respectively during the 11th and 9th CHINARE and a sequence of paleoclimate variations is well established based on sediment rock magnetic properties. In Antarctica, the magnetic properties show a close linkage to paleoenvironmental variations. The Core NP95-1 well recorded several paleoclimatic events, such as Heinrich event 1, Bolling Allerod warm period and Younger Dryas cold event. The Heinrich event 1 occurred at about 14.2 ka B. P., Younger Dryas cold event occurred between 11.7 ka B. P. and 10.3 ka B. P., and the boundary of Pleistocene and Holocene in Antarctica is 10.3 ka B. P.. In Holocene, two warm periods were recorded at about 10.0 ka B. P. and 6.0 ka B. P. with a little cold period between them. After 6.0 ka B. P., two cores both recorded a cold climatic oscillation. Paleoclimate described by two cores rock magnetic measurements was simultaneously changed in Eastern and Western Antarctica during the same period two cores commonly covered.

关键词: paleoclimatic variation, environmental magnetism, Younger Dryas, Heinrich event 1, marine sediment, rock magnetism, Antarctica

Abstract:

In this paper, authors report some results obtained from systematic rock magnetic measurements on Core NP95-1 and Core NG93-1 , which were collected from the Prydz Bay, Eastern Antarctica and Great Wall Bay (Maxwell Bay), Western Antarctica respectively during the 11th and 9th CHINARE and a sequence of paleoclimate variations is well established based on sediment rock magnetic properties. In Antarctica, the magnetic properties show a close linkage to paleoenvironmental variations. The Core NP95-1 well recorded several paleoclimatic events, such as Heinrich event 1, Bolling Allerod warm period and Younger Dryas cold event. The Heinrich event 1 occurred at about 14.2 ka B. P., Younger Dryas cold event occurred between 11.7 ka B. P. and 10.3 ka B. P., and the boundary of Pleistocene and Holocene in Antarctica is 10.3 ka B. P.. In Holocene, two warm periods were recorded at about 10.0 ka B. P. and 6.0 ka B. P. with a little cold period between them. After 6.0 ka B. P., two cores both recorded a cold climatic oscillation. Paleoclimate described by two cores rock magnetic measurements was simultaneously changed in Eastern and Western Antarctica during the same period two cores commonly covered.

Key words: paleoclimatic variation, environmental magnetism, Younger Dryas, Heinrich event 1, marine sediment, rock magnetism, Antarctica