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

合作研究：俄罗斯科拉东北部和卡宁半岛的Weichselian冰川期和冰消期历史

• 批准号: 0094982
• 负责人: Steven Forman
• 金额: $ 12.54万
• 依托单位: University of Illinois at Chicago
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-04-01 至 2005-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0094982&HistoricalAwards=false
• 关键词: Collaborative; Research; Weichselian; Glaciation; Deglaciation

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.

这是伊利诺伊大学芝加哥分校和鲍林绿色大学之间的一个合作项目。主要研究人员计划破译俄罗斯科拉半岛和卡宁半岛东北部的冰川历史。 这一地区位于斯堪的纳维亚和巴伦支海冰盖的假定末次冰期最大期（LGM）交汇处附近，对这两个冰块的重建非常重要。 然而，最近发表的该地区的冰川重建提出了各种不同的解释。 特别是，不确定性存在于卡宁半岛的冰川作用在末次盛冰期和一个独立的Ponoi冰帽的存在和范围内的科拉半岛东部在冰川消退。 在这个地区的不确定性很大程度上是由于缺乏对该地区冰川作用和冰川消退特征的年代控制。为了验证这些相互矛盾的假设，主要研究人员将开展一项广泛的冰川地质实地考察计划，该计划强调收集数据，以提供改进的冰川消退年表。 他们将进行补充地质年代学方法，利用宇宙成因的36Cl和10Be的积累和湖泊中保存的基底有机物质的放射性碳测年，进行岩石表面暴露测年。 将从暴露的冰川地形和冰川冲刷的基岩表面采集表面暴露样品。 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样来获得。 此外，还将收集关于冰川地质学的新的基本数据，如冰流方向指标和冰川地层学，并将其与该区域以前的观测结果相结合，为研究提供地貌和地层框架。 这项研究应导致显着改善我们的知识的程度晚Weichselian冰川和年表和该地区的冰川消退模式。 更好地了解一个独立的Ponoi冰帽的存在和时间将提供一种手段，以评估区域气候梯度在新仙女木和早期晚冰期气候事件。 此外，该地区晚期魏氏冰期和冰川消退的改进重建将通过提供更真实的数据来帮助更广泛的科学界，以改进全球气候，地球流变学和海平面变化的模型。