DOI: 10.1002/2013GL058413
论文题名: Aligned glaciotectonic rafts on the central Barents Sea seafloor revealing extensive glacitectonic erosion during the last deglaciation
作者: Rüther D.C. ; Andreassen K. ; Spagnolo M.
刊名: Geophysical Research Letters
ISSN: 0094-8277
EISSN: 1944-8008
出版年: 2013
卷: 40, 期: 24 起始页码: 6351
结束页码: 6355
语种: 英语
英文关键词: Barents Sea Ice Sheet
; erosion on glaciated margins
; glaciotectonics
; megablocks and rafts
Scopus关键词: Compressional strain
; Continental shelves
; Glacial erosion
; Glaciated margins
; Glaciotectonics
; Ice sheet
; Last deglaciation
; megablocks and rafts
; Chains
; Glacial geology
; Sea ice
; Erosion
; bedform
; compression
; continental shelf
; crevasse
; entrainment
; erosion rate
; glacial transport
; glaciotectonics
; ice sheet
; ice stream
; last glaciation
; seafloor
; shear zone
; Arctic Ocean
; Barents Sea
英文摘要: Erosion rates on glaciated continental shelves are remarkably high, especially within ice stream troughs. Although glaciotectonic erosion may have considerably contributed to enhanced glacial erosion of these landscapes, entrainment mechanisms of glaciotectonically emplaced megablocks and rafts remain little understood. Here we report a northeast-southwest trending chain of over 1300 glacial rafts, observed on the seafloor in Bjørnø yrenna, a paleo-ice stream trough with particularly high erosion rates. The landform assemblage adjacent to the glacial rafts includes streamlined bedforms and crevasse-squeeze ridges and may represent a lateral shear zone where a paleo-ice stream met cold stagnant ice during the last deglaciation. Individual glacial rafts along the chain are up to 30 m high, tend to be elongated with lengths and widths on the order of tens of meters, and are oriented from northeast-southwest to north-south. The north-southern rearrangement of rafts may reflect a compressional strain regime along the ice stream margin. ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84890400679&doi=10.1002%2f2013GL058413&partnerID=40&md5=06cc31bcd770708f1d68ea5ae2c9b7c2
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5541
Appears in Collections: 气候减缓与适应
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作者单位: Faculty of Engineering and Science, Sogn and Fjordane University College, Box 133, 6851 Sogndal, Norway
Recommended Citation:
Rüther D.C.,Andreassen K.,Spagnolo M.. Aligned glaciotectonic rafts on the central Barents Sea seafloor revealing extensive glacitectonic erosion during the last deglaciation[J]. Geophysical Research Letters,2013-01-01,40(24).