Ice-Rafting History of the Central Arctic Ocean During the Last 600 KA

尽管对北极深海沉积物中的生物成因成分进行了大量研究，但对于周围陆块的冰川历史和北冰洋中部的冰流事件，仍存在一些相互矛盾的假设。该奖项支持对岩屑和重矿物颗粒的分析以及铁钛氧化物颗粒的反射光岩石学和显微探针组成，以确定北冰洋中部沉积物岩芯中的冰筏事件的历史，并确定这些沉积物的来源。这种方法真正有可能区分北冰洋的冰筏事件，并将冰筏碎屑与周围陆地的潜在来源联系起来，从而提供明确的北美北极冰川历史以及更清晰的北冰洋中部古海洋学历史。北冰洋的冰流历史和起源对于我们全面了解更新世的古气候和古海洋学是至关重要的。

Despite numerous studies of the biogenic component in Arctic deep- sea sediments, several conflicting hypotheses exist concerning the history of glaciations on the surrounding land-masses and ice- rafting events in the central Arctic Ocean. This award supports the analysis of lithic and heavy mineral particles and the reflected light petrography and microprobe composition of Fe-Ti oxide grains to determine the history of ice-rafting events in sediment cores from the central Arctic Ocean and determine the sources for these sediments. This approach has the real potential to differentiate ice-rafting events in the Arctic Ocean and link ice-rafted detritus to potential sources from the surrounding landmass and thus provide a definitive glacial history for the North American Arctic as well as a clearer paleoceanographic history of the central Arctic Ocean. This ice-rafting history and provenance of the Arctic Ocean is critical to our full understanding of Pleistocene paleoclimate and paleoceanography.