The Steensby Inlet Ice Stream in the context of the deglaciation of Northern Baffin Island, Eastern Arctic Canada

Dyke AS

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The Steensby Inlet Ice Stream in the context of the deglaciation of Northern Baffin Island, Eastern Arctic Canada

机译：加拿大东部北极北部巴芬岛冰消作用下的Steensby入口冰流

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Deglaciation of northern Baffin Island involved several large ice streams with contrasting histories. Three north-flowing, marine-based ice streams were in place during the Last Glacial Maximum, but they retreated at widely varying rates during the early and middle Holocene. The Steensby Inlet Ice Stream formed in response to over-steepening of the ice front during deglaciation of Foxe Basin. It caused an abrupt change, in places a general reversal, of flow about 6 ka BP and operated across its full width for only about 500 years. Nevertheless, it left a distinct subglacial footprint, including an hourglass shaped bedform set. A dense network of till samples from the region of the ice stream reveals a sharp-sided, pluglike dispersal of carbonate debris that was sustained by erosion in the source area of about 5 mm a(-1). The ice stream devolved into valley-controlled ice streams separated by cold-based ice over interfluves. The former evacuated debris along valleys and left erosional till scarps along the sides of sliding ice. Post-ice-stream end moraines, including the large Gifford Moraine, require later cold-based flow across the drumlins formed by the ice stream. Copyright (C) 2008 John Wiley & Sons, Ltd.

机译：巴芬岛北部的冰川消融涉及几条历史相反的大型冰河。在最后一次冰河期最高峰期间，有三条北向，以海洋为基础的冰流到位，但在全新世早期和中期，它们以大不相同的速率退缩。 Steensby入口冰流的形成是对Foxe盆地脱冰过程中冰锋过度加深的反应。它导致了大约6 ka BP的流量突然发生变化，在一般情况下发生了逆转，并且仅在整个宽度上运行了大约500年。然而，它留下了独特的冰川下足迹，包括沙漏形的床套。来自冰流区域的耕层样品的密集网络显示出碳酸盐碎片的尖锐侧塞状分散，该碳酸盐碎片通过侵蚀在约5 mm a（-1）的源区中得以维持。冰流变成了河谷控制的冰流，被冰冷的冰隔着分流器隔开。前者沿山谷疏散了碎屑，并沿滑冰的侧面留下了侵蚀性的侵蚀直至陡峭。包括大型Gifford冰a在内的冰后溪流最终需要较冷的流过由冰流形成的鼓形林。版权所有（C）2008 John Wiley＆Sons，Ltd.

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《Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group》 |2008年第4期|共20页
作者
Dyke AS;
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正文语种 eng
中图分类天文学、地球科学;
关键词
Baffin Island; ice stream; deglaciation; dispersal train; end moraine; cold-based ice; DISPERSAL;

机译：巴芬岛;冰流;冰消;分散火车;冰m末;冰基冰;迪珀瑟尔;

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1. The Steensby Inlet Ice Stream in the context of the deglaciation of Northern Baffin Island, Eastern Arctic Canada [J] . Dyke AS Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group . 2008,第4期

机译：加拿大东部北极北部巴芬岛冰消作用下的Steensby入口冰流
2. GIS analyses of ice-sheet erosional impacts on the exposed shield of Baffin Island, eastern Canadian Arctic [J] . Ebert Karin Canadian journal of earth sciences . 2015,第11期

机译：GIS分析冰盖侵蚀对加拿大东部北极巴芬岛裸露盾构的影响
3. Subglacially precipitated carbonates record geochemical interactions and pollen preservation at the base of the Laurentide Ice Sheet on central Baffin Island, eastern Canadian Arctic [J] . Kurt A. Refsnider, Gifford H.Miller, Marilyn L. Fogel, Quaternary Research: An Interdisciplinary Journal . 2014,第1期

机译：冰川下沉淀的碳酸盐记录了加拿大东部北极巴芬岛中部Laurentide冰盖底部的地球化学相互作用和花粉保存
4. IMAGE CLASSIFICATION FROM LANDSAT TM, AIRBORNE MAGNETICS AND DEM DATA FOR MAPPING PALEOPROTEROZOIC BEDROCK UNITS, BAFFIN ISLAND, NUNAVUT, CANADA [C] . Ernst Schetselaar, Eric de Kemp International Society for Photogrammetry and Remote Sensing Congress . 2009

机译：来自Landsat TM，机载磁性和DEM数据的图像分类，用于绘制古邦古代基岩单位，Baffin Island，Nunavut，加拿大
5. Melting ice caps of northern Baffin Island: Providing a context for current Arctic warming. [D] . Anderson, Rebecca Kate. 2007

机译：巴芬岛北部的冰盖融化：为当前的北极变暖提供背景。
6. Arctic marine phytobenthos of northern Baffin Island [O] . Frithjof C. Küpper, Akira F. Peters, Dawn M. Shewring, -1

机译：巴芬岛北部的北极海洋植物底栖动物
7. A Report of Physiographic Conditions of Eastern Victoria Island and adjacent areas, Northwest Territories, Canada. Memorandum RM-2707-1-PR. Jan. 1963 A Report on the Physical Environment of the Thelon River area, Northwest Territories, Canada. Memorandum RM-1903-1-PR. Jan. 1963 A Report on the Physical Environment of the Quoich River area, Northwest Territories, Canada. Memorandum RM-19977-1-PR. Jan. 1963 A Report on the Physical Environment of the Great Bear River area, Northwest Territories, Canada. Memorandum RM-2122-1-PR. Jan. 1963 A Report on the Physical Environment of Southern Baffin Island, Northwest Territories, Canada. Memorandum RM-2362-1-PR. Jan. 1963 A Report on the Physical Environment of Northern Baffin Island and adjacent areas, Northwest Territories, Canada. Memorandum RM-2706-1-PR. Jan. 1963 A Report of Pysiographic conditions of Central Beffin Island and adjacent areas, Northwest Territories, Canada. Memorandum RM-2837-1-PR. Jan. 1963. Prepared by the Department of Geography, McGill University, Montréal, for the United States Air Force Project RAND. Published by the RAND Corporation, Santa Monica, California, U.S.A., Jan. 1963. [O] . Falconer George 1963

机译：加拿大西北地区东维多利亚岛及邻近地区的地貌条件报告。备忘录Rm-2707-1-pR。 1963年1月加拿大西北地区塞隆河地区的自然环境报告。备忘录Rm-1903-1-pR。 1963年1月加拿大西北地区Quoich河地区的自然环境报告。备忘录Rm-19977-1-pR。 1963年1月加拿大西北地区大熊河地区的自然环境报告。备忘录Rm-2122-1-pR。 1963年1月加拿大西北地区南巴芬岛的自然环境报告。备忘录Rm-2362-1-pR。 1963年1月加拿大西北地区北巴芬岛及邻近地区的自然环境报告。备忘录Rm-2706-1-pR。 1963年1月加拿大西北地区中部Beffin岛和邻近地区的pysiographic状况报告。备忘录Rm-2837-1-pR。 1963年1月，由蒙特利尔麦吉尔大学地理系为美国空军项目兰德编写。由美国加利福尼亚州圣莫尼卡兰德公司出版，1963年1月。

The Steensby Inlet Ice Stream in the context of the deglaciation of Northern Baffin Island, Eastern Arctic Canada

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