Paleomagnetism of the Late Cretaceous and Early Tertiary Rocks from Fildes Peninsula, West Antarctica, and its Geotectonic Significance

The paleomagnetic m of 109 oriented samples collected from drill cores through 5 rock units of Late Cretaceous and Early Tertiary on Fildes Peninsula were systematically studies. According to the study, the paleomagnetic pole position of this area is different from the position of Australia during t...

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Bibliographic Details
Main Authors: Chun, Liu, Rixiang, Zhu, Xiangshen, Zheng, Xiaohan, Liu, Zengxin, Jin, Yu, Feng
Format: Article in Journal/Newspaper
Language:English
Published: Polar Research Institute of China - PRIC 1992
Subjects:
Fildes
Fildes peninsula
Land Glacier
West Antarctica
Advances in Polar Science
Antarc*
Antarctica
Polar Science
Online Access:http://library.arcticportal.org/2044/
http://library.arcticportal.org/2044/1/A199201005.pdf
Description
Summary:The paleomagnetic m of 109 oriented samples collected from drill cores through 5 rock units of Late Cretaceous and Early Tertiary on Fildes Peninsula were systematically studies. 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.

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