| 西南极菲尔德斯半岛白垩纪晚期和第三纪早期岩石的古地磁学及其大地构造意义 |
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| 引用本文： | 刘椿,朱日祥,郑祥身,刘小汉,金增信,冯宇.西南极菲尔德斯半岛白垩纪晚期和第三纪早期岩石的古地磁学及其大地构造意义[J].极地研究,1991,3(2):136-143. |
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| 作者姓名： | 刘椿 朱日祥 郑祥身 刘小汉 金增信 冯宇 |
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| 作者单位： | 中国科学院地质研究所，中国科学院地质研究所，中国科学院地质研究所，中国科学院地质研究所，中国科学院地质研究所，中国科学院地质研究所 北京 100029，北京 100029，北京 100029，北京 100029，北京 100029，北京 100029 |
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| 摘 要： | 采自菲尔德斯半岛白垩纪晚期和第三纪早期五个岩层单位的12个采点109块定向岩芯标本进行了系统的古地磁学测定,从中得知,55～45Ma时期,该区极位置与澳大利亚的同时期结果不同,它经历了大约20°～30°的南向水平移动与70°～80°的西向旋转,逐渐地构成了今日彼此相对位置的格架。文章绘制出南极洲的视极移曲线。
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| 关 键 词： | 菲尔德斯半岛 古地磁极位置 构造位移 视极移曲线 |
PALEOMAGNETISM OF THE LATE CRETACEOUS AND EARLY TERTIARY ROCKS FROM FILDES PENINSULA, WEST ANTARCTICA AND ITS GEOTECTONIC SIGNIFICANCE |
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| Liu Chun,Zhu Rixiang,Zheng Xiangshen,Liu Xiaohan,Jin Zengxin,Feng Yu.PALEOMAGNETISM OF THE LATE CRETACEOUS AND EARLY TERTIARY ROCKS FROM FILDES PENINSULA, WEST ANTARCTICA AND ITS GEOTECTONIC SIGNIFICANCE[J].Chinese Journal of Polar Research,1991,3(2):136-143. |
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| Authors: | Liu Chun Zhu Rixiang Zheng Xiangshen Liu Xiaohan Jin Zengxin Feng Yu |
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| Abstract: | The paleomagnetism of 109 oriented drill cores collected from 5 rock unites of Late Cretaceous and Early Tertiary at sites in Fildes Peninsula has been systematically studied. According to the study, the paleomagnetic pole position of Antarctica was not at the same position as that of the Australia during the 55-45 Ma period. This means that it was the breaking up of the Gondwanaland during 55-45 Ma, Australia was seperated
from the Gondwanaland, drifting southward 20°-30° Lat. and rotating 70°-80°
westward then gradually arriving at recent position. The paleolatitudinal data indicate that the area studied was covered by land glacier at that time is not impossible. The apparent polar wander path of Antarctica through the geological time are also roughly worked out. |
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| Keywords: | Fildes Peninsula paleomagnetic pole position Tectonic displacement apparent polar wander path |
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