【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。更多还原

【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 seperatedfrom 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.更多还原