DOI: 10.1016/j.gloplacha.2015.01.008
论文题名: Alpine topography in the light of tectonic uplift and glaciation
作者: Robl J. ; Prasicek G. ; Hergarten S. ; Stüwe K.
刊名: Global and Planetary Change
ISSN: 0921-8181
出版年: 2015
卷: 127 起始页码: 34
结束页码: 49
语种: 英语
英文关键词: European alps
; Glacial buzz-saw
; Premature landscape
; Slope stability
; Slope-elevation distribution
Scopus关键词: Decay (organic)
; Glacial geology
; Lithology
; Tectonics
; Equilibrium line altitudes
; European Alps
; Glacial landforms
; Last Glacial Maximum
; Plio-pleistocene
; Premature landscape
; Slope-elevation distribution
; Topographic gradients
; Slope stability
; alpine environment
; cooling
; equilibrium line
; fluvial landform
; glaciation
; ice cap
; Last Glacial Maximum
; lithology
; orogeny
; slope stability
; temperature gradient
; topography
; uplift
; Europe
英文摘要: In steady-state orogens, topographic gradients are expected to increase with elevation whereas the European Alps feature a transition from increasing to decreasing slopes. This peculiar pattern has been interpreted to reflect either the critical slope stability angle or a premature fluvial landscape but is also consistent with the glacial buzz-saw hypothesis. To disentangle the contributions of each of these principles we split the Alps into contiguous domains of structural units and analyze their slope-elevation distributions emphasizing glaciated and non-glaciated realms. In comparable structural units within the extent of the last glacial maximum (LGM) the transition from increasing to decreasing slopes is located at the equilibrium line altitude (ELA) of the LGM and we interpret this to be evidence for the impact of glacial erosion. Decay rates of glacial landforms towards steady-state slopes depend on lithological properties leading to a landscape characterized by different transient states. Beyond the LGM limits the slope-elevation distributions show local maxima as well, but these are located at varying altitudes implying a tectonic driver. This observation and data from surrounding basins suggests that at least parts of the European Alps experienced a pre-Pleistocene pulse of tectonic uplift. The resulting presence of premature low-gradient terrain above the ELA during the global cooling in Plio-Pleistocene times would have heavily influenced the onset and the extent of an alpine ice cap. © 2015 Elsevier B.V. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84922020912&doi=10.1016%2fj.gloplacha.2015.01.008&partnerID=40&md5=1b34eb87c58c03ab5b60c4793af116d3
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/11543
Appears in Collections: 全球变化的国际研究计划 气候变化与战略
There are no files associated with this item.
作者单位: University of Salzburg, Geography and Geology, Salzburg, Austria
Recommended Citation:
Robl J.,Prasicek G.,Hergarten S.,et al. Alpine topography in the light of tectonic uplift and glaciation[J]. Global and Planetary Change,2015-01-01,127.