DOI: 10.1016/j.jag.2013.05.004
Scopus记录号: 2-s2.0-84893875949
论文题名: LiDAR detection of paleolandslides in the vicinity of the Suasselkä postglacial fault, Finnish Lapland
作者: Sutinen R ; , Hyvönen E ; , Kukkonen I
刊名: International Journal of Applied Earth Observation and Geoinformation
ISSN: 15698432
出版年: 2014
卷: 27, 期: PARTA 起始页码: 91
结束页码: 99
语种: 英语
英文关键词: Finland
; Landslide
; Lapland
; LiDAR
; Postglacial fault
Scopus关键词: deglaciation
; detection method
; earthquake magnitude
; electrical conductivity
; Holocene
; landslide
; lidar
; radiocarbon dating
; seismicity
; spatial distribution
; Fennoscandia
; Finland
; Kittila
; Lappi [Finland]
; Betula
英文摘要: Spatial distribution of paleolandslides coincides with postglacial faults (PGFs) in northern Fennoscandia, yet the timing of the seismic events and associated paleoslides is insufficiently known. We applied airborne LiDAR (Light Detection And Ranging) to record distribution of paleolandslides possibly associated with the known Suasselkä postglacial fault in Kittilä, western Finnish Lapland. Landslide-buried organic material was radiocarbon dated to bring insight if the landslides were generated by single high-magnitude (Mw > 7) earthquake or if seismic activity has continued through the Holocene. We found a total of four sets of previously unrecognized paleolandslides to indicate fault-activity in the Kittilä area. The size of the landslide scarps exceeded up to 250-300 m in width, up to 600 m in length and 10 m in the height of the back-wall. A previously unrecognized (tentatively PGF) scarp, 6 m in height and in conjunction with paleolandslides, was found in granite rock west of the Kittilä village. The slide debris was similar to local tills, yet the maximum electrical conductivity (σa) anisotropy was incoherent to any of the ice-flow (morphological) stages recognized through LiDAR or known fabric-sedimentary stratigraphy. We found peat/gyttja beneath 6 m of slide debris which yielded radiocarbon (14C) age of 4400 ± 35 BP (cal. 5055 yr BP). Our previous finding of landslide-buried woody remnants of birch (Betula ssp.) yielded cal. 9730 yr BP in Kittilä. These ages suggest that seismic activity has continued at least 5 ky after deglaciation. © 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79619
Appears in Collections: 气候变化事实与影响
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作者单位: Geological Survey of Finland, P.O. Box 77, FIN-96101 Rovaniemi, Finland; Geological Survey of Finland, Betonimiehenkuja 4, FIN-02150 Espoo, Finland; University of Helsinki, Department of Physics, P.O. Box 64, FIN-00014 Helsinki, Finland
Recommended Citation:
Sutinen R,, Hyvönen E,, Kukkonen I. LiDAR detection of paleolandslides in the vicinity of the Suasselkä postglacial fault, Finnish Lapland[J]. International Journal of Applied Earth Observation and Geoinformation,2014-01-01,27(PARTA)