Quaternary Marine Stratigraphy and Sedimentology of Chilean Fiords and Continental Shelf, Western Patagonia

该奖项支持两次前往智利南部峡湾和大陆架的海洋地质巡航。研究将集中于收集和分析单通道地震反射数据、3.5 KHz剖面仪数据和活塞岩心。这项工作将研究有关巴塔哥尼亚冰盖的动力学的基本问题，在晚期威斯康辛冰期，以及它如何响应变化的海洋和陆地气候在末次冰期/间冰期过渡。该项目代表了目前对南极半岛海洋地质调查的延伸，从更广泛的纬度范围包括冰川海洋环境。为了提高岩石学和地震地层学研究在第四纪科学的广泛适用性，本研究将与其他研究海洋和陆地古气候的研究人员合作进行。将结合地球化学和同位素分析，检查微植物区系（硅藻）和微动物区系的岩心变化。我们将对一些岩心进行孢粉学研究，以纠正我们对陆地和海洋古气候关系的误解。该项目还将与对该地区的沉积和构造历史感兴趣的智利研究人员合作进行。通过将南极半岛的海洋研究扩展到巴塔哥尼亚，并通过将其范围扩大到包括陆海相关性，将获得沿广泛纬度范围的气候时空变化的宝贵见解。

This award supports two marine geological cruises to the fjords and continental shelf of southern Chile. Research will concentrate on the collection and analysis of single channel seismic reflection data, 3.5 KHz profiler data, and piston cores. This work will examine fundamental questions concerning the dynamics of the Patagonian ice sheet during the late Wisconsin glaciation and how it responded to changing marine and terrestrial climate during the last glacial/interglacial transition. This project represents an extension of current investigations into the marine geology of the Antarctic Peninsula to include glacial marine environments from a wider latitudinal range. In order to enhance the applicability of litho and seismo- stratigraphic studies to a broader range of Quaternary science, this research will be conducted in cooperation with other researchers investigating marine and terrestrial paleoclimate. Down core changes in micro-flora (diatoms) and micro-fauna will be examined in conjunction with geochemical and isotopic analyses. Palynological studies of some cores will be undertaken in an attempt to refine our misunderstanding of the relationship between terrestrial and marine paleoclimates. The project will also be undertaken in cooperation with Chilean researchers who are interested in the sedimentary and tectonic history of the region. By extending the marine studies of the Antarctic Peninsula to Patagonia, and by broadening their scope to include land-sea correlations, valuable insight will be gained into spatial and temporal changes on climate along a broad range of latitudes.