论文部分内容阅读
对采自东南极普里兹湾海区沉积物ＮＰ９３－２柱样系统的磁组构分析，结果表明：１．普里兹湾海洋沉积物具有较大的磁化率各向异性，较好地指示了沉积过程中水动力过程的变化；２．由磁化率各向异性主轴方向确定的古水流方面主要为近ＥＷ向及ＮＳ向，分别对应着南极绕极环流的方向及由融冰水的大量生成而导致的南极底层水形成的方向，这两种不同方向的水流在该海区不同时段的表现各不相同；３．依据表征磁组构的参数及古水流方向的变化，可将１２７００ａＢ．Ｐ．以来的南极地区的古气候分成５个古气候变化带．
The magnetic structure analysis of the NP93-2 column sample collected from the Prydz Bay sea area in Southeast Pole shows that: 1. The Prydz Bay marine sediment has a large anisotropy of magnetic susceptibility, which indicates the change of hydrodynamic process during sedimentation.2. The paleocurrents determined by the direction of the main axis of anisotropy of magnetic susceptibility are mainly near EW and NS, which correspond to the directions of Antarctic polar circulation and the formation of Antarctic bottom water due to the large generation of ice melt Two different directions of the water flow in the sea at different times of the performance of different; 3. Based on the parameters characterizing the magnetic structure and the direction of the ancient water flow changes, can 12700aB. P. Since the Antarctic paleoclimate divided into five ancient climate change zone.