极地研究

极地研究 ›› 1992, Vol. 3 ›› Issue (1-English): 40-49.

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PALEOMAGNETISM OF THE LATE CRETACEOUS AND EARLY TERTIARY ROCKS FROM FILDES PENINSULA,WEST ANTARCTICA, AND ITS GEOTECTONIC SIGNIFICANCE

 Liu Chun1, Zhu Rixiang2, Zheng Xiangshen1, Liu Xiaohan1, Jin Zengxin1, Feng Yu1   

  1. 1Institute of Geology, Academia Sinica, Beijing 100029 2Institute of Geophysics, Academia Sinica, Beijing 100101
  • 出版日期:1942-03-30 发布日期:1942-03-30
  • 通讯作者: Liu Chun
  • 基金资助:

    This work was supported by the National Scientific Foundation Committee. 

PALEOMAGNETISM OF THE LATE CRETACEOUS AND EARLY TERTIARY ROCKS FROM FILDES PENINSULA,WEST ANTARCTICA, AND ITS GEOTECTONIC SIGNIFICANCE

Liu Chun1, Zhu Rixiang2, Zheng Xiangshen1, Liu Xiaohan1, Jin Zengxin1, Feng Yu1   

  1. 1Institute of Geology, Academia Sinica, Beijing 100029 2Institute of Geophysics, Academia Sinica, Beijing 100101
  • Online:1942-03-30 Published:1942-03-30
  • Contact: Liu Chun
  • Supported by:

    This work was supported by the National Scientific Foundation Committee. 

PDF (PC)

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摘要：

The paleomagnetis m of 109 oriented samples collected from drill cores through 5 rock units of Late Cretaceous and Early Tertiary on Fildes Peninsula were systematically studied. According to the study, the paleomagnetic pole position of this area is different from the position of Australia during the 55-45 Ma period. This means that when the break-up of the Gondwanaland at 55-45 Ma ago, Australia was separated from the Gondwanaland, drifting southward 20°-30°Lat. and rotating 70°-80°westward and then gradually arriving at recent position. The paleolatitudinal data indicate that it is not impossible that the area studied was covered with land glacier at that time. The apparent polar wander path of Antarctica through the geological time are also roughly worked out.

关键词: Fildes Peninsula, paleomagnetic pole position, tectonic displacement, apparent polar wander path

Abstract:

The paleomagnetis m of 109 oriented samples collected from drill cores through 5 rock units of Late Cretaceous and Early Tertiary on Fildes Peninsula were systematically studied-According to the study, the paleomagnetic pole position of this area is different from the position of Australia during the 55-45 Ma period. This means that when the break - up of the Gondwanaland at 55 - 45 Ma ago, Australia was separated from the Gondwanaland, drifting southward 20°-30°Lat. and rotating 70°-80°westward and then gradually arriving at recent position . The paleolatitudinal data indicate that it is not impossible that the area studied was covered with land glacier at that time. The apparent polar wander path of Antarctica through the geological time are also roughly worked out.

Key words: Fildes Peninsula, paleomagnetic pole position, tectonic displacement, apparent polar wander path