华北平原石家庄东南部宁晋泊地区湖相地层的年龄测定

Age dating of lacustrine deposits in the Ningjinbo area, Shijiazhuang, North China Plain.

对华北平原宁晋泊地区南王庄剖面和钻孔上部岩心的湖相沉积物作了14C、细颗粒(2～8μm)多矿物组分的热释光(TL)和光释光(OSL)3种技术的年代测定,确定了宁晋泊地区湖相地层的年龄。剖面上部12.90m为距今3万年以来的沉积物,其中最顶部的5.34m为全新统,其下为上更新统,年龄分辨率高,建立了一个可信的沉积地层年代序列,为研究华北平原宁晋泊地区的古气候和古环境演化提供了准确的年代学资料。

Dating of lacustrine deposits at the Nanwangzhuang section and cores in the upper part of a drill hole in the Ningjinbo area, North China Plain, has been performed using 14C technique and thermoluminescence (TL) and optically stimulated luminescence (OSL) for the fine-grained (2-8 μm) multi-mineral components. The ages of the lacustrine deposits in the area has been determined as follows: the deposits in the upper part with a thickness of 12.90 m have an age of 30 ka, of which the uppermost 5.34 m interval is Holocene in age and the rest is late Pleistocene in age. The age resolution is so high that a reliable sedimentary age sequence has been established, which provides accurate chronological data for the study of the paleoclimatic and paleoenvironmental evolution in the Ningjinbo area of the North China Plain.