• 责任者：Ge Shulan (First Institute of Oceanography ; State Oceanic Administration ; Qingdao 266061 ; China) ; Shi Xuefa
• 刊名：Chinese Journal of Geophysics
• 出版年：2013
• 卷期：56(9)
• 关键词：冰后期 ; postglacial period ; 磁场强度 ; magnetic intensity ; 白令海 ; Bering Sea
• 页码：p.3071-3084
• 图表：illus., 41 refs.
• 分类号：1400
• issnNo：ISSN0001-5733
• isbnNo：CN11-2074/P

     Paleomagnetic and rock magnetic investigation were undertaken in a continental slope core B5-4 in the Bering Sea for the purpose of acquiring intensity and direction of the geomagnetic field.The results are as follows.（1） The magnetic properties are uniform except for the finer magnetic grain size of the upper 0～0.44 m and the relative paleointensity in the core is highly consistent with that of ODP983.（2） According to the correlation between relative paleointensity in core B5-4 and ODP983 and an AMS 14C dating of foraminifera at 4.54～4.56 m,three correlation points can be further determined,thus the age model in core B5-4 was obtained.（3） The declination and inclination in core B5-4 agree highly with that of high latitude records,for example Lake Baikal,North America and Europe and the spherical harmonic model of local geomagnetic field,which provide additional tie points for the age model and a near linear sedimentation for the last 14 ka was revealed.（4） The inclination correlation between B5-4 and two cores from the continental shelf of east China suggests that the two discrete sections of shallow inclinations in core B5-4 are likely the Gothenburg event and the early diagenesis or smoothing effect might be the cause of shallow not negative inclination.The above results prove that both relative paleointensity and direction can be obtained in appropriate sediment of Bering Sea that serves as time marker.This is very helpful in paleoenvironmental and paleoceanographic study in Arctic and subarctic areas considering the awful scarcity of age information due to the shortage of calcerous tests and shells.