The East Greenland Fjord-Shelf-Slope Continuum: Late Quaternary Variations in Sediment Flux and Accumulation with Time and Space

该奖项支持海洋地质研究，以记录东格陵兰岛Kangerdlugssuaq峡湾附近（峡湾/大陆架）环境的沉积物通量和积累，并将其与加拿大东部北极边缘和北欧海边缘的类似大陆架/峡湾环境进行比较（作为国际PONAM项目的一部分）。这项研究将着重研究该峡湾内现今的沉积物过程和通量，并将开发一个自冰川晚期以来沉积物通量和物理和生物组成变化的模型。本工作还将着重研究古海洋学和古气候随时间的变化。这项研究将把蛋白石和硅藻通量以及底栖有孔虫作为地表水生产力和底水条件变化的指标。1991年秋，冰岛一艘研究船将对峡湾和内大陆架进行一次侦察巡航，将提供有关海底形态、浅层地震结构、地表沉积物特征、生物和岩石地层学、沉积学、地层学、水文学和悬浮物的初步数据。加拿大研究船哈德逊号于1992年进行了第二次巡航，将获得侧扫描声纳数据、峡湾盆地额外的高分辨率Huntec DTS地层学，以及可以进一步描绘地震和地层学之间关系的长岩芯。

This award supports marine geologic research to document sediment flux and accumulation on the proximal (fjord/shelf) environments off Kangerdlugssuaq Fjord, East Greenland, and to compare these with similar shelf/fjord environments along the Eastern Canadian Arctic margin and with margins of the Nordic Seas (as part of the international PONAM Project). This research will emphasize the study of present-day sediment processes and fluxes within this fjord and will develop a model of variations in sediment fluxes and physical and biological composition since the late glacial. This work will also emphasize the paleoceanographic and paleoclimatic variations with time. The research will target opal and diatom flux as well as benthic foraminifera as indicators of change in surface water productivity and bottom water conditions. A reconnaissance cruise to the fjord and inner shelf in the autumn 1991, on an Icelandic research vessel, will provide preliminary data regarding the sea floor morphology, shallow seismic structure, surface sediment characteristics, bio- and lithostratigraphy, sedimentology, stratigraphy, hydrology and suspended matter. A second cruise, on the Canadian research vessel Hudson, in 1992 will obtain side- scan sonar data, additional high-resolution Huntec DTS stratigraphy of the fjord basin, and long cores that will allow further delineation of the relationships between the seismic and core stratigraphy.