Collaborative Research: Weichselian Glaciation and Deglaciation History, Northeastern Kola and Kanin Peninsula, Russia

摘要SnyderOPP-0095089 Forman OPP-0094982这是伊利诺伊大学芝加哥分校和保龄格林大学的合作提案。首席调查人员建议破译俄罗斯东北部科拉和卡宁半岛的冰川历史。该地区位于斯堪的纳维亚和巴伦支海冰盖假定的末次冰川最大(LGM)交汇处附近，对这两个冰块的重建非常重要。然而，最近发表的对该地区的冰川重建提出了各种不同的解释。特别是，在末次盛冰期期间卡宁半岛的冰川作用，以及在冰川消融期间科拉半岛东部是否存在独立的波诺伊冰帽及其范围，都存在不确定性。这一地区的不确定性很大程度上是由于缺乏对与该地区冰川和冰川消融有关的特征的年代学控制。为了检验这些相互矛盾的假设，首席调查人员将进行一项广泛的冰川地质野外计划，该计划强调收集数据，以提供改进的冰川消融年代学。他们将采用互补的地质年代学方法，利用宇宙成因的36Cl和10Be的积累进行岩面暴露测年，并对保存在湖泊中的基础有机物质进行放射性碳测年。地表暴露样本将从暴露的冰川反复无常和冰川冲刷的基岩表面收集。放射性碳样本将通过对该地区丰富的冰川冲刷湖泊进行取芯获得。此外，还将收集有关冰川地质的新的基本数据，如冰流方向指示器和冰川地层学，并将其与以前在该区域进行的观测结合起来，为其调查提供地貌和地层框架。这项研究应该会大大改善我们对魏氏晚期冰川作用的程度以及该地区冰川消融的年代学和模式的认识。更好地了解独立的波诺伊冰帽的存在和时间，将提供一种手段来评估年轻仙女木和早期冰川晚期气候事件期间的区域气候梯度。此外，改进该区域魏克赛尔晚期冰川和冰川消融的重建工作将有助于更广泛的科学界，为改进全球气候、地球流变学和海平面变化的模型提供更现实的数据。

AbstractSnyderOPP-0095089Forman OPP-0094982This is a collaborative proposal between the University of Illinois-Chicago and Bowling Green University. The Principal Investigators propose to decipher the glaciation history of northeastern Kola and Kanin peninsulas, Russia. This region, situated near the presumed last glacial maximum (LGM) confluence of the Scandinavian and Barents Sea ice sheets, is very important to the reconstruction of both ice masses. However, recent published glacier reconstructions of the region propose a variety of different interpretations. In particular, uncertainty exists on the glaciation of Kanin Peninsula during the LGM and on the presence and extent of an independent Ponoi ice cap on eastern Kola Peninsula during deglaciation. Much of the uncertainty in this region results from a lack of chronological control on features associated with glaciation and deglaciation of the region.To test these conflicting hypotheses, the Principal Investigators will undertake a broad glacial geologic field program which emphasizes the collection of data to provide an improved chronology of deqlaciation. They will do complementary geochronologic methods rock surface exposure dating utilizing the accumulation of cosmogenic 36Cl and 10Be and radiocarbon dating of basal organic materials preserved in lakes. Surface exposure samples will be collected from exposed glacial erratics and glacier-scoured bedrock surfaces. Radiocarbon samples will be obtained by coring glacier-scoured lakes, abundant in the region. In addition, new basic data on glacial geology, such as ice-flow-direction indicators and glacial stratigraphy, will be collected and integrated with previous observations in the region to provide a geomorphic and stratigraphic framework for their investigations. This research should lead to significant improvements in our knowledge of the extent of Late Weichselian glaciation and the chronology and patterns of deglaciation in the region. Better knowledge of the existence and timing of an independent Ponoi ice cap will provide a means to assess regional climatic gradients during the Younger Dryas and earlier late-glacial climate events. Furthermore, improved reconstruction of Late Weichselian glaciation and deglaciation of the region will aid the broader scientific community by providing more realistic data to improve models of global climate, Earth rheology and sea-level change.