渤海湾西岸QX02孔Ⅱ海的识别及OSL年龄
发布时间：2019-04-24 22:03
【摘要】：以渤海湾沿海低地的QX02孔为研究对象,进行了沉积岩石学分析和底栖有孔虫统计,结合加速器质谱~(14)C测年和光释光(optically stimulated luminescence,OSL)测年,探讨了该孔记录的第Ⅱ海相层埋深和形成时代。第Ⅱ海相层厚度11.4m,记录相对海面高度-26.83~-15.43m。AMS~(14)C年龄表明,Ⅱ海形成于MIS 3早期、甚至更早。OSL年代学研究显示,Ⅱ海样品等效剂量离散度较高,并且主要集中在2个区间,计算得到新、老2个年龄阶段。基于OSL测年原理的常规判断,认为较老的83.5~62.6ka阶段系受曝光不充分组分的影响,通常采用较年轻的51.9~39.9ka阶段为QX02孔的Ⅱ海沉积年龄。但是,较老的一组年龄从新的视角,暗示了可能的原始沉积过程及相应的海侵发生时间,因而具有重要的年代学和沉积学意义。
[Abstract]:The sedimentary petrological analysis and benthic foraminifera statistics were carried out on the QX02 hole in the coastal lowland of Bohai Bay, combined with accelerator mass spectrometry ~ (14) C dating and photoluminescence (optically stimulated luminescence,OSL) dating. The buried depth and forming age of the second marine layer recorded by this hole are discussed. The thickness of the 鈪，
本文编号：2464826
[Abstract]:The sedimentary petrological analysis and benthic foraminifera statistics were carried out on the QX02 hole in the coastal lowland of Bohai Bay, combined with accelerator mass spectrometry ~ (14) C dating and photoluminescence (optically stimulated luminescence,OSL) dating. The buried depth and forming age of the second marine layer recorded by this hole are discussed. The thickness of the 鈪，
本文编号：2464826
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