Abstract:

In this paper, environmental magnetism of two marine sediment cores NP95 1 and NG93 1 is systematically studied ( core NP95 1 was collected from Prydz Bay,Eastern Antarctica, and core NG93 1 was sampled from Great Wall Bay, Western Antarctica), and a series of paleoclimatic variations is obtained.Results show that the rock magnetic parameters well correspond to the paleoclimatic variations and sedimentary environmental changes. The NP95 1 well recorded the Heinrich event 1, Younger Dryas cold event and Bolling Allerod warm period, and the Heinrich event 1 occurred at 14.3kaB.P., Younger Dryas occurred at 11.7～10.3kaB.P..The boundary of Pleistocene and Holocene in Antarctica is 10.3 kaB.P.. In Holocene,two warm periods were recorded at about 10kaB.P. and 6.0kaB.P. with a little colder period between them. After 6.0kaB.P., two cores both recorded a cold climatic oscillation.