Abstract:

Two reversal geomagnetic excursions are detected by systematically paleomagnetic measurements of the core NP93 2 from the Prydz Bay, Eastern Antarctica. One is found in 60 to 67.5cm from the top of the core,and the 14 C dating age of layer 67.5cm to 72.5cm is 10315±800a B.P. It is estimated that the reversal geomagnetic excursion occurred at 9980-8880a B.P.,and perhaps,was the record of the Gothenburg geomagnetic excursion(about 12000a B.P.).The other is found in 27.5-32.5cm,and 14 C dating age is 5390±600a B.P.,with which no generally acknowledged reversal geomagnetic excursion can be compared.But a few reports of reversal geomagnetic excursions in China can be used for comparing with it.Whether the studied reversal geomagnetic excursion does exist or those reported reversal geomagnetic excursions are the same ones is worth further study.