DOI: 10.1016/j.quascirev.2017.07.009
Scopus记录号: 2-s2.0-85028054175
论文题名: Pleniglacial sedimentation process reconstruction on laminated lacustrine sediments from lava-dammed Paleolake Alf, West Eifel Volcanic Field (Germany)
作者: Eichhorn L. ; Pirrung M. ; Zolitschka B. ; Büchel G.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2017
卷: 172 起始页码: 83
结束页码: 95
语种: 英语
英文关键词: Clastic sediments
; Lamination
; Lava-dammed lake
; Pleniglacial
Scopus关键词: Erosion
; Lakes
; Sedimentation
; Surface waters
; Suspended sediments
; Volcanoes
; Clastic sediments
; Lacustrine sediments
; Lamination
; Multiproxy approach
; Pleniglacial
; Resuspension process
; Sediment delivery
; Sedimentation process
; Sediments
英文摘要: Differentiating between regularly seasonal, irregular and event-based clastic sedimentation is difficult if sedimentation structures resemble and dating methods are imprecise. In this study - clastic light and dark laminae from lava-dammed Paleolake Alf in the Late Pleistocene in the Quaternary West Eifel Volcanic Field are analyzed to clarify how they formed and if they are of annual origin and comparable to assumed periglacial varves from neighboring Lake Holzmaar. Therefore, a multiproxy approach is applied combining sediment thin section analysis which focuses on composition and structure with 14C dates. The results are compared to recently-formed annually-laminated clastic sediments of, e.g., the High Canadian Arctic. Observed sedimentation structures reveal sediment delivery by over- and interflows and deposition from suspension forming two characteristic microfacies: Type I graded laminae and Type II laminae with graded sublayers. Additionally, erosional bases and event deposits indicate episodic underflows. Thus, lamination is potentially seasonal but is significantly veiled by extreme runoff causing erosion and resuspension processes or a mixed water body preventing sediment delivery into the lake basin. However, sedimentation processes between watershed and lake could be reconstructed by comparing recent and paleosediment structures. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59117
Appears in Collections: 过去全球变化的重建
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作者单位: Friedrich Schiller University Jena, Institute for Earth Sciences, Jena, Germany; University of Bremen, Institute of Geography, Bremen, Germany
Recommended Citation:
Eichhorn L.,Pirrung M.,Zolitschka B.,et al. Pleniglacial sedimentation process reconstruction on laminated lacustrine sediments from lava-dammed Paleolake Alf, West Eifel Volcanic Field (Germany)[J]. Quaternary Science Reviews,2017-01-01,172