globalchange  > 气候变化事实与影响
DOI: 10.1130/G45684.1
WOS记录号: WOS:000461609100014
论文题名:
Comparison of monitoring data with paleo-slip rates: Cosmogenic nuclide dating detects acceleration of a rockslide
作者: Bohme, M.1; Hermanns, R. L.1,2; Gosse, J.3; Hilger, P.1,4; Eiken, T.4; Lauknes, T. R.5; Dehls, J. F.1
通讯作者: Bohme, M.
刊名: GEOLOGY
ISSN: 0091-7613
EISSN: 1943-2682
出版年: 2019
卷: 47, 期:4, 页码:339-342
语种: 英语
WOS关键词: SLOPE INSTABILITIES ; ROCK SLOPE ; PERMAFROST ; FAILURE ; TIME ; RECONSTRUCTION ; LANDSLIDES ; HOLOCENE ; CLIMATE ; MODEL
WOS学科分类: Geology
WOS研究方向: Geology
英文摘要:

Instrumental monitoring of displacement rates of slow-moving rockslides is limited to an insufficient length of the pre-catastrophic failure deformation time. Prehistorical slip rates need to be considered to provide context for monitoring data in relation to the length of the failure process. Cosmogenic Be-10 exposure ages (n = 10) on the backscarp of the Gamanjunni-3 rockslide (northern Norway) are between 5.3 +/- 0.5 ka and 1.2 +/- 0.1 ka. These ages were adjusted for prefailure nuclide production at depth based on the Be-10 concentration in quartz from a stable horizontal bedrock surface above the rockslide. Displacement initiated between 6.6 and 4.3 ka with a relatively fast or instantaneous displacement rate that decelerated a few hundred years after initiation. Slide initiation coincided with the end of the Holocene thermal optimum in northern Norway. The age-height relationship on the backscarp yields an average paleo-slip rate of 28 (-5/+7) mm/yr. This is significantly slower than present-day rates of 54 mm/yr. However, during slide initiation, slip rates were faster than present-day rates. Considering its location within the modern permafrost zone and the observations from instrumental and Holocene displacement rates, we suggest that future global climate changes will influence the Gamanjunni-3 block slip rate.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/132662
Appears in Collections:气候变化事实与影响

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作者单位: 1.Geol Survey Norway, POB 6315, N-7491 Trondheim, Norway
2.Norwegian Univ Sci & Technol, Dept Geosci & Petr, N-7491 Trondheim, Norway
3.Dalhousie Univ, Dept Earth Sci, 1355 Oxford St, Halifax, NS B3H 4R2, Canada
4.Univ Oslo, Dept Geosci, POB 1047, N-0316 Oslo, Norway
5.NORCE Norwegian Res Ctr, POB 6434, N-9294 Tromso, Norway

Recommended Citation:
Bohme, M.,Hermanns, R. L.,Gosse, J.,et al. Comparison of monitoring data with paleo-slip rates: Cosmogenic nuclide dating detects acceleration of a rockslide[J]. GEOLOGY,2019-01-01,47(4):339-342
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