Quartz and K-feldspar optical dating chronology of eolian sand and lacustrine sequence from the southern Ulan Buh Desert, NW China: Implications for reconstructing late Pleistocene environmental evolution (SCI)

CORC > 寒区旱区环境与工程研究所 > 中科院寒区旱区环境与工程研究所（未分类） > 期刊论文

	Quartz and K-feldspar optical dating chronology of eolian sand and lacustrine sequence from the southern Ulan Buh Desert, NW China: Implications for reconstructing late Pleistocene environmental evolution (SCI)
	Li G. Q. ; Jin M. ; Wen L. J. ; Zhao H. ; Madsen D. ; Liu X. K. ; Wu D. ; Chen F. H.
刊名	Palaeogeography Palaeoclimatology Palaeoecology
	2014
卷号	393 期号:111-121
英文摘要	The Ulan Buh Desert (UBD), in southwestern Inner Mongolia, is one of the main dune fields and dust source areas in northern China. In the southern UBD, consisting primarily of high pyramidal and complex sand dunes, the process of desert evolution remains unclear due to a lack of depositional records and adequate age controls. In this study, we present the stratigraphic record of a 120.5 m deep core (WL12ZK-1) collected in this sandy desert region. A 22.6 m thick deposit of lacustrine clay/silty clay bracketed between 37 m (top) and 54.7 m (bottom) thick layers of eolian sand, provides evidence of a desert-lake-desert sequence in the southern UBD. Quartz Optical Stimulated Luminescence (OSL) and K-feldspar multi-elevated-temperature post-IR IRSL (Met-pIRIR) dating technologies were employed to provide a chronology for this sequence. Internal checks of the quartz OSL dating indicate that the quartz single-aliquot regenerative-dose protocol is appropriate for equivalent dose determination and that the quartz ages younger than 60 ka are acceptable. The reliability of the K-feldspar ages is confirmed by both internal checks and an age-temperature plot. The combined stratigraphy and chronology indicate a sand desert landscape developed in the southern UBD at least similar to 232 ka ago, and that a paleolake was present beginning sometime before similar to 155 ka and lasting until similar to 87 ka, with several possible lake level fluctuations. Desert landforms developed synchronously in the southern and northern UBD after the paleolake regressed. A combination of tectonic activity and climate change may be responsible for this sequence. (C) 2013 Elsevier B.V. All rights reserved.
收录类别	SCI
公开日期	2015-12-24
内容类型	期刊论文
源URL	[http://ir.casnw.net/handle/362004/24838]
专题	寒区旱区环境与工程研究所_中科院寒区旱区环境与工程研究所（未分类）_期刊论文
推荐引用方式 GB/T 7714	Li G. Q.,Jin M.,Wen L. J.,et al. Quartz and K-feldspar optical dating chronology of eolian sand and lacustrine sequence from the southern Ulan Buh Desert, NW China: Implications for reconstructing late Pleistocene environmental evolution (SCI)[J]. Palaeogeography Palaeoclimatology Palaeoecology,2014,393(111-121).
APA	Li G. Q..,Jin M..,Wen L. J..,Zhao H..,Madsen D..,...&Chen F. H..(2014).Quartz and K-feldspar optical dating chronology of eolian sand and lacustrine sequence from the southern Ulan Buh Desert, NW China: Implications for reconstructing late Pleistocene environmental evolution (SCI).Palaeogeography Palaeoclimatology Palaeoecology,393(111-121).
MLA	Li G. Q.,et al."Quartz and K-feldspar optical dating chronology of eolian sand and lacustrine sequence from the southern Ulan Buh Desert, NW China: Implications for reconstructing late Pleistocene environmental evolution (SCI)".Palaeogeography Palaeoclimatology Palaeoecology 393.111-121(2014).