DOI: 10.1038/ngeo2278
论文题名: Millennial-scale record of landslides in the Andes consistent with earthquake trigger
作者: McPhillips D. ; Bierman P.R. ; Rood D.H.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2014
卷: 7, 期: 12 起始页码: 925
结束页码: 930
语种: 英语
Scopus关键词: climate change
; earthquake trigger
; geological record
; landscape evolution
; landslide
; paleoclimate
; proxy climate record
; river channel
; terrace
; Andes
; Peru
英文摘要: Geologic records of landslide activity offer rare glimpses into landscapes evolving under the influence of tectonics and climate. Because the deposits of individual landslides are unlikely to be preserved, landslide activity in the geologic past is often reconstructed by extrapolating from historic landslide inventories. Landslide deposits have been interpreted as palaeoclimate proxies relating to changes in precipitation, although earthquakes can also trigger landslides. Here we measure cosmogenic 10 Be concentrations in individual cobbles from the modern Quebrada Veladera river channel and an adjacent terrace in Peru and calculate erosion rates. We find, in conjunction with a 10 Be production model, that the 10 Be concentrations of each cobble population record erosion integrated over thousands of years and are consistent with a landslide origin for the cobbles. The distribution of 10 Be concentrations in terrace cobbles produced during the relatively wet climate before about 16,000 years ago is indistinguishable from the distribution in river channel cobbles produced during the drier climate of the past few thousand years. This suggests that the amount of erosion from landslides has not changed in response to climatic changes. Instead, our integrated, millennial-scale record of landslides implies that earthquakes may be the primary landslide trigger in the arid foothills of Peru. © 2014 Macmillan Publishers Limited. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106551
Appears in Collections: 气候减缓与适应 科学计划与规划
There are no files associated with this item.
作者单位: Department of Earth Sciences, Syracuse University, Syracuse, NY, United States; Department of Geology, University of Vermont, Burlington, VT, United States; Department of Earth Science and Engineering, Imperial College London, South Kensington Campus, London, United Kingdom; Scottish Universities Environmental Research Centre, Scottish Enterprise Technology Park, East Kilbride, United Kingdom
Recommended Citation:
McPhillips D.,Bierman P.R.,Rood D.H.. Millennial-scale record of landslides in the Andes consistent with earthquake trigger[J]. Nature Geoscience,2014-01-01,7(12)