A large ice sheet or ice shelf may have developed repeatedly along the East Siberian continental margin since the Middle Pleistocene. In combination with ice-rafted debris, major elements, and foraminifera, clay mineral records from four gravity sediment cores are used to trace ice events along the East Siberian continental margin during the last two glaciations. The clay mineral assemblages show a strong link to the extent of the East Siberian ice sheet (ESIS) rather than the ice shelf or icebergs sourced from the Canadian Arctic. During the last two glaciations, illite-rich sediment from East Siberia was transported mainly toward the deep basin, whereas kaolinite-rich sediment from the Canadian Arctic was mostly blocked from the East Siberian continental margin. We speculate that during marine isotope stage 2 (MIS2), the southern Mendeleev Ridge, Chukchi Basin, and Chukchi Rise may have been covered by an ESIS-extended ice shelf; however, the Chukchi Plateau and Northwind Ridge were dominated by a Laurentide-sourced ice shelf. During MIS4, the ESIS may have undergone a marked expansion, with an extended ice shelf occupying all of the Chukchi Plateau and Northwind Ridge, thereby restricting iceberg discharge from other ice sheets.

自中更新世以来，西伯利亚东部大陆边缘可能反复形成大型冰盖或冰架。与浮冰碎片，主要元素和有孔虫相结合，使用了来自四个重力沉积物岩心的粘土矿物记录来追踪最后两个冰期沿西伯利亚东部大陆边缘的冰事件。粘土矿物组合与东西伯利亚冰原（ESIS）的范围显示出很强的联系，而不是与来自加拿大北极的冰架或冰山有紧密的联系。在最后两次冰期期间，来自西伯利亚东部的富含伊利石的沉积物主要被输送到深盆，而来自加拿大北极的富含高岭石的沉积物大部分被阻止了东西伯利亚大陆边缘。我们推测在海洋同位素第2阶段（MIS2）期间，Mendeleev岭南部，Chukchi盆地和Chukchi Rise可能已被ESIS扩展的冰架覆盖；然而，楚科奇高原和罗斯文岭由劳伦代德出产的冰架主导。在MIS4期间，ESIS可能经历了明显的扩张，扩张的冰架占据了楚科奇高原和Northwind Ridge的所有地带，从而限制了其他冰原的冰山排放。