DOI: 10.1016/j.quascirev.2016.12.002
Scopus记录号: 2-s2.0-85009201765
论文题名: Two Late Pleistocene climate-driven incision/aggradation rhythms in the middle Dnieper River basin, west-central Russian Plain
作者: Panin A. ; Adamiec G. ; Buylaert J.-P. ; Matlakhova E. ; Moska P. ; Novenko E.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2017
卷: 166 起始页码: 266
结束页码: 288
语种: 英语
英文关键词: Aeolian processes
; Fluvial geomorphology
; Large meanders
; OSL dating
; Palaeochannels
; River palaeohydrology
; River terraces
; SEM study of quartz grains
Scopus关键词: Climate change
; Floods
; Glacial geology
; Landforms
; Phase shift
; Runoff
; Water resources
; Aeolian process
; Fluvial geomorphology
; Large meanders
; OSL dating
; Palaeochannels
; Quartz grains
; River terraces
; Rivers
英文摘要: In valleys of the River Seim and its tributaries in the middle Dnieper basin (west-central Russian Plain), two low terraces (T1, 10–16 m, and T0, 5–7 m above the river) and a floodplain (2–4 m) with characteristic large and small palaeochannels exist. A range of field and laboratory techniques was applied and ∼30 new numerical ages (OSL and 14C dates) were obtained to establish a chronology of incision and aggradation events that resulted in the current valley morphology. Two full incision/aggradation rhythms and one additional aggradation phase from the previous rhythm were recognized in the Late Pleistocene – Holocene climate cycle. The following events were detected. (1) Late MIS 5 – early MIS 4: aggradation of Terrace T1 following the deep incision at the end of MIS 6. (2) Late MIS 4 (40–30 ka): incision into Terrace T1 below the present-day river, formation of the main scarp in the bottom of the valley between Terrace T1 and Terrace T0/Floodplain levels. (3) MIS 2: aggradation of Terrace T0, lateral migrations of a shallow braided channel located few meters above the present-day river since ∼25 ka through the LGM. (4) 18–13 ka: incision into Terrace T0 below the modern river. Multiple-thread channels concentrated in a single flow that at some places formed large meanders. In the period 15–13 ka, high floods that rose above the present-day floods left large levees and overbank loams on Terrace T0. (5) Younger Dryas – Holocene transition: aggradation up to the modern channel level, transformation of large Late Glacial to small Holocene meanders. The established incision/aggradation rhythms are believed to be manifested over the Central Russian Plain outside the influence of ice sheets in the north and base level changes in the south. The two-phase deepening of the valley occurred in the last quarter of the last glacial epoch but can not be attributed directly to the glacial-interglacial transition. Both the detected incision events correspond to relatively warm climate phases – late MIS 3, post-LGM warming including the Bølling-Allerød interstadial. Anomalously large size of the preserved river palaeochannels prove that the post-LGM incision phase was induced by a climatically forced large increase of water runoff. Considerable increase of water discharges is considered the most probably cause for the late MIS 4 incision phase also. Therefore river incision seems to have been governed rather by changing water runoff that oscillated in phase shift with the thermal regime. © 2016 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59208
Appears in Collections: 过去全球变化的重建
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作者单位: Faculty of Geography, Lomonosov Moscow State University, Lengory 1, Moscow, Russian Federation; Institute of Geography RAS, Staromonetniy pereulok, 29, Moscow, Russian Federation; Institute of Physics – Centre for Science and Education, Silesian University of Technology, Konarskiego 22B, Gliwice, Poland; Nordic Laboratory for Luminescence Dating, Department of Geoscience, Aarhus University, Risø Campus, Roskilde, Denmark; Centre for Nuclear Technologies, Technical University of Denmark, Risø Campus, Roskilde, Denmark
Recommended Citation:
Panin A.,Adamiec G.,Buylaert J.-P.,et al. Two Late Pleistocene climate-driven incision/aggradation rhythms in the middle Dnieper River basin, west-central Russian Plain[J]. Quaternary Science Reviews,2017-01-01,166