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在渤海湾沿海低地地区获得4个机械钻孔,结合AMS14C测年方法,对Ⅱ海的年龄进行了研究。结果显示,在Ⅱ海所在层位获得的14C样品年龄均大于43.5ka BP,说明渤海湾沿海低地地区Ⅱ海形成于MIS 3早期或MIS 5,而不是前人认为的23~39ka。建议在前人地层结构研究成果的基础上,系统开展Ⅱ海年龄研究。
Four mechanical boreholes were obtained in the lowland area of Bohai Bay, and the age of Ⅱ seawater was studied in combination with AMS14C dating method. The results show that the age of 14C samples obtained in the layer where Ⅱ sea is located is greater than 43.5 ka BP, indicating that the Ⅱ sea formed in the early MIS 3 or MIS 5 in the coastal areas of the Bohai Bay instead of the 23 ~ 39 ka previously thought. It is suggested that based on the research results of previous stratigraphic structures, we should conduct a systematic study on age Ⅱ sea.