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通过北冰洋西部楚科奇海盆M03孔的沉积物颜色旋回、AMS14C测年、有孔虫丰度、冰筏碎屑(Ice-Rafted Detritus,IRD)与北风脊NWR5孔的对比,建立了M03孔的地层框架,其347cm长的沉积物被划分为MIS7～MIS1的沉积序列.其中,深度16～20cm之间可能存在长达10～20ka的沉积间断.晚第四纪以来,楚科奇海盆M03孔可以识别出7个IRD事件,它们分别出现在MIS1,MIS3,MIS5以及MIS7.这些IRD主要被大冰块或者冰山所夹带,通过加拿大北极群岛的麦克卢尔海峡冰流输出到波弗特海,并被波弗特环流输送至楚科奇海盆.楚科奇海盆晚第四纪的IRD事件不仅指示了这些粗碎屑沉积物的来源和冰山的输出事件,而且还反映了波弗特环流和北美冰盖的演变历史.
Based on the comparison of sediment color rotation, AMS14C dating, foraminiferal abundance, ice-Rafted Detritus (IRD) and NWR5 pore of north chute ridge in western Chukchi basin of western Arctic Ocean, M03 pore was established Of the sedimentary framework of the 347cm long sediment is divided into MIS7 ~ MIS1 deposition sequence, of which depths of 16 ~ 20cm may exist up to 10 ~ 20ka sedimentary interval since the late Quaternary Chukchi Basin M03 Holes identify seven IRD incidents that occur on MIS1, MIS3, MIS5, and MIS7, respectively, which are mainly carried by large ice blocks or icebergs and are output to the Beaufort Sea through the Meclueol Strait Ice Stream in the Canadian Arctic Archipelago And circulated by Beaufort to the Chukotze basin.The late Quaternary IRD events of the Chukotka basin not only indicated the origin of these coarse clastic sediments and the output events of the iceberg but also reflected the Beaufort circulation And North American ice sheet evolution history.