Extent and dynamics of the former Patagonian Ice Sheet.

我的博士研究巴塔哥尼亚古冰川的反应，和他们的proglacial/冰坝湖泊，冰消的开始后，南半球末次冰期最大（LGM）结束。在LGM期间，巴塔哥尼亚冰盖覆盖了智利的大部分地区，向西进入太平洋，并在东部的阿根廷山麓结束。大多数年代学数据集中在北方（NPI，46- 47 oS）、南方（SPI，48- 51 oS）和科迪勒拉达尔文（CDI，54 oS）冰原周围，NPI以北的数据很少。这种数据的纬度集中妨碍了我们评估气候或动力学控制冰盖衰退的能力。同样，缺乏区域高分辨率地貌测绘阻碍了我们研究冰川退缩的风格和方式的纬度变化的能力。我的博士学位旨在提供位于巴塔哥尼亚中部的多个山谷的沉积物地貌组合的详细评估，以更好地约束古冰瓣行为的动态，并开发新的年代数据集，量化冰碛形成的时间，冰帽解压缩和前巴塔哥尼亚冰盖这一地区的大陆排水路线的开放。

My PhD investigates the response of Patagonian palaeo-glaciers, and their proglacial/ice-dammed lakes, to the onset of deglaciation following the end of the Southern Hemisphere Last Glacial Maximum (LGM). During the LGM, the Patagonian Ice Sheet covered most of Chile, calving into the Pacific to the West and terminating in the Argentinean foothills to the East. Most chronological data are focused around the Northern (NPI, 46-47oS), Southern (SPI, 48-51oS) and Cordillera Darwin (CDI, 54oS) Icefields, and there are few data North of the NPI. This latitudinal focusing of data impedes our ability to assess climatic or dynamical controls on ice sheet recession. Likewise, a paucity of regional high-resolution geomorphological mapping impedes our ability to examine latitudinal variations in the style and manner of glacier recession. My PhD aims to provide a detailed assessment of sediment-landform assemblages across multiple valleys located in central Patagonia, in order to better constrain the dynamics of palaeo ice-lobe behaviour, and to develop new chronological datasets that quantify the timing of moraine formation, ice-cap unzipping and opening of continental drainage routes for this region of the former Patagonian Ice Sheet.