Collaborative Research: Ice-Core Analysis & Physical Glaciology of the Galena Creek Rock Glacier, Wyoming

9614854克拉克我们建议对怀俄明州西北部Absaroka山脉Galena Creek的岩石冰川进行全面研究，以确定岩石冰川作为冰芯古气候记录来源的潜力。Galena Creek岩石冰川是Galena Creek岩石冰川最容易接触和研究最充分的冰川学技术之一，用于确定物质平衡、流动特征以及内部成分和化学成分。岩石冰川在北极和高山地区随处可见，但它们在很大程度上被冰川学家忽视了，部分原因是人们普遍认为它们本质上是由冰胶结质的距骨。我们以前已经证明，加莱纳克里克岩石冰川含有可以通过冰芯钻探获得的冰川残留物。我们的项目结合了两位冰川地质学家(NP和DC)、一位冰芯地球化学家(ES)和两位冰川学家(WP和NH)的专业知识，他们在岩石冰川方面有广泛的工作经验。地球物理工作将包括钻探几个钻孔(40-60米深)以测量变形、测量地表速度和提取冰芯。将对冰芯进行稳定同位素(18O和(D))、电导率和目视地层学的分析。这项工作的预期成果包括：1)更好地了解岩石冰川的气候背景；2)评估新的、潜在的强大的冰芯古气候数据来源。

9614854 Clark We propose a comprehensive study of a rock glacier at Galena Creek in the Absaroka Mountains, northwestern Wyoming, to determine the potential of rock glaciers as sources for ice-core paleoclimate records. The Galena Creek rock glacier is one of the most easily-accessible and well-studied glaciological techniques to the Galena Creek rock glacier to determine mass balance, flow characteristics, and internal composition and chemistry. Rock glaciers are ubiquitous features in arctic and alpine regions, yet they have been largely ignored by glaciologists, in part because of the widely-held belief that they are essentially ice-cemented talus. We have demonstrated previously that the Galena Creek rock glacier contains remnant glacier ice that can be retrieved by ice-core drilling. Our project draws on the combined expertise of two glacial-geologists (NP and DC) who have worked extensively with rock glaciers, an ice-core geochemist (ES), and two glaciologists (WP and NH). Geophysics work will include drilling of several boreholes (40-60 meters depth) for deformation measurements, measurement of surface velocities, and retrieval of ice cores. Ice cores will be analyzed for stable isotopes ((18O and (D), electrical conductivity, and visual stratigraphy. Expected results of this work include 1) improved understanding of the climatic context of rock glaciers and 2) evaluation of a new and potentially powerful source of ice-core paleoclimate data.