DOI: 10.1016/j.quascirev.2018.09.037
Scopus记录号: 2-s2.0-85054300931
论文题名: Short-term soil formation events in last glacial east European loess, evidence from multi-method luminescence dating
作者: Veres D. ; Tecsa V. ; Gerasimenko N. ; Zeeden C. ; Hambach U. ; Timar-Gabor A.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2018
卷: 200 起始页码: 34
结束页码: 51
语种: 英语
英文关键词: Climate dynamics
; Eastern Europe
; Embryonic soils
; Loess
; Luminescence dating
; Millennial-scale loess records
; MIS 2 embryonic soils
; Pleistocene
英文摘要: Here we provide a robust luminescence chronology for Stayky (Ukraine), a reference profile in European Late Pleistocene loess stratigraphy, based on optically stimulated luminescence (OSL) dating on quartz (4–11 μm, 63–90 μm) and post infrared-infrared stimulated luminescence (pIR-IRSL)) on polymineral fine grains. For the Bug loess unit, the equivalent of Marine Isotope Stage (MIS 2), results are in agreement between methods, demonstrating that the suite of embryonic soils previously interpreted as reflecting climate variability similar to Greenland interstadials (GI) actually date to ∼29/27-15 ka, with most emplaced around or after 20 ka. This temporal span is further confirmed by age-depth modelling of available data. Apart from GI-2, no interstadial-type climate events are recorded in Greenland ice core data for that time interval. As short-term pedogenetic phases are also documented in records from central-western Europe, there is a need for more research into the European mid-latitude terrestrial environments response to MIS 2 hydroclimate variability. The dating of Vytachiv paleosol, previously debatably linked to various GI events within MIS 3 resulted in ages of ∼40 ± 4 ka and ∼53 ± 4 ka at the lower transition, and ∼26 ± 2 ka to ∼30 ± 2 ka in the overlying loess. These ages indicate that the truncated Vytachiv paleosol is either not continuous, or that it encompasses a broader age range within MIS 3 than previously considered. In both cases, data would not allow for an unambiguous linking of this paleosol with specific GI events as previously attempted. The pIR-IRSL290 dating of the loams immediately underneath Pryluky unit in the range of ∼120 ka to ∼168 ka and of the Pryluky mollisol from ∼90 ka to 126 ka confirm the broad correspondence of this unit with MIS 5, although poor dose recovery results open the possibility for further testing on the degree these ages provide overestimated results. Quartz data severely underestimate the pIR-IRSL290 ages for these samples. The application of pIR-IRSL290 dating for the underlying Dnieper till previously linked to the Saalian glaciation resulted in natural signals at the level of laboratory saturation, yielding minimum ages of c. 700 ka. For the same sample, the natural SAR-OSL signals for 4–11 μm quartz were found significantly below laboratory saturation level, resulting in finite ages of ∼250–270 ka interpreted here as underestimates, while coarse quartz (63–90 μm) signals reached about 85% of the laboratory saturation level. These data suggest extreme caution must be taken when dating such old samples using quartz OSL. Results from our high-resolution luminescence dating raises important implications for the chronological representativeness of Stayky as a key loess site in Eastern Europe beyond MIS 2. © 2018 The Authors Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112014
Appears in Collections: 气候减缓与适应
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作者单位: Romanian Academy, Institute of Speleology, Clinicilor 5, Cluj-Napoca, 400006, Romania; Interdisciplinary Research Institute on Bio-Nano-Science of Babeş-Bolyai University, Treboniu Laurean 42, Cluj-Napoca, 400271, Romania; Faculty of Environmental Sciences and Engineering, Babeş-Bolyai University, Fântânele 30, Cluj-Napoca, 400294, Romania; Taras Shevshenko National University, Glushkova Prospect 2a, Kiev, 03127, Ukraine; IMCCE, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ Paris 06, Univ Lille, Paris, 75014, France; BayCEER& Chair of Geomorphology, University of Bayreuth, Bayreuth, D-95440, Germany
Recommended Citation:
Veres D.,Tecsa V.,Gerasimenko N.,et al. Short-term soil formation events in last glacial east European loess, evidence from multi-method luminescence dating[J]. Quaternary Science Reviews,2018-01-01,200