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

[摘要]这是伊利诺斯州芝加哥大学和鲍灵格林大学的合作提案。主要研究人员建议破译俄罗斯科拉半岛和卡宁半岛东北部的冰川历史。该区域位于假定的末次冰盛期（LGM）斯堪的纳维亚海和巴伦支海冰盖汇合处附近，对这两个冰盖的重建非常重要。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，在LGM期间，卡宁半岛的冰川作用存在不确定性，在冰川消退期间，科拉半岛东部独立的波诺伊冰盖的存在和范围存在不确定性。该地区的许多不确定性是由于缺乏对与该地区冰川作用和冰川消退有关的特征的时间控制。为了验证这些相互矛盾的假设，首席研究人员将开展一个广泛的冰川地质实地项目，该项目强调收集数据，以提供一个改进的冰川消融年表。他们将采用互补的地质年代学方法，利用宇宙成因36Cl和10Be的积累进行岩石表面暴露定年，并对湖泊中保存的基础有机物质进行放射性碳定年。地表暴露样本将从暴露的冰川不稳定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样来获得。此外，将收集新的冰川地质基础数据，如冰流方向指标和冰川地层学，并将其与该地区以前的观测结果相结合，为他们的调查提供地貌和地层学框架。这项研究将大大提高我们对魏奇塞勒晚期冰川作用范围以及该地区冰川消退的年代学和模式的认识。更好地了解独立波诺伊冰盖的存在和时间，将为评估新仙女木期和早期晚冰期气候事件期间的区域气候梯度提供一种手段。此外，对该地区晚魏奇塞勒冰川和消冰期的改进重建将为更广泛的科学界提供更现实的数据，以改进全球气候、地球流变和海平面变化的模型。

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.