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对渭南黄土剖面L1 0至S1 3进行了详细的岩石磁学和古地磁学研究 ,获得了CobbMountain极性事件转换过程中地球磁场变化特征 .结果表明 :(ⅰ )CobbMountain极性事件与地球磁场方向变化相联系的持续时间约 2 2ka ;(ⅱ )从统计意义上讲 ,VGPs主要沿两个经度带移动 ;(ⅲ )CobbMountain极性事件期间地球磁场强度明显减弱
The detailed study on lithology and paleomagnetism of L1 0 to S1 3 in Weinan loess section has obtained the characteristics of the Earth's magnetic field during the conversion of polar events in CobbMountain.The results show that: (i) the polar events of CobbMountain and the directions of the earth's magnetic field (Ii) Statistically, VGPs move mainly along two longitudes; (iii) Earth's magnetic field intensity is significantly weakened during the CobbMountain polar event