【摘要】：以渤海灣沿海低地的QX02孔為研究對(duì)象,進(jìn)行了沉積巖石學(xué)分析和底棲有孔蟲統(tǒng)計(jì),結(jié)合加速器質(zhì)譜~(14)C測(cè)年和光釋光(optically stimulated luminescence,OSL)測(cè)年,探討了該孔記錄的第Ⅱ海相層埋深和形成時(shí)代。第Ⅱ海相層厚度11.4m,記錄相對(duì)海面高度-26.83~-15.43m。AMS~(14)C年齡表明,Ⅱ海形成于MIS 3早期、甚至更早。OSL年代學(xué)研究顯示,Ⅱ海樣品等效劑量離散度較高,并且主要集中在2個(gè)區(qū)間,計(jì)算得到新、老2個(gè)年齡階段�；贠SL測(cè)年原理的常規(guī)判斷,認(rèn)為較老的83.5~62.6ka階段系受曝光不充分組分的影響,通常采用較年輕的51.9~39.9ka階段為QX02孔的Ⅱ海沉積年齡。但是,較老的一組年齡從新的視角,暗示了可能的原始沉積過(guò)程及相應(yīng)的海侵發(fā)生時(shí)間,因而具有重要的年代學(xué)和沉積學(xué)意義。
[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，

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