DOI: 10.1016/j.quascirev.2013.04.016
Scopus记录号: 2-s2.0-84885176807
论文题名: The utility of desert sand dunes as Quaternary chronostratigraphic archives: Evidence from the northeast Rub' al Khali
作者: Leighton C.L. ; Bailey R.M. ; Thomas D.S.G.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2013
卷: 78 起始页码: 303
结束页码: 318
语种: 英语
英文关键词: Bayesian
; Optically stimulated luminescence
; Quaternary climate change
; Sand dune
; Stratigraphy
Scopus关键词: Bayesian
; Environmental change
; Optically stimulated luminescence
; Quaternary climate
; Sampling strategies
; Sand dunes
; Sedimentary structure
; United Arab Emirates
; Bayesian networks
; Climate change
; Luminescence
; Sedimentology
; Sediments
; Stratigraphy
; Landforms
; Bayesian analysis
; chronology
; chronostratigraphy
; climate variation
; desert
; dune
; hiatus
; lithostratigraphy
; luminescence dating
; paleoenvironment
; reconstruction
; software
; Rub al Khali
; United Arab Emirates
英文摘要: The distributions of optically stimulated luminescence (OSL) ages from dunes are affected by palaeoenvironmental changes, complex dune dynamics and sampling strategy. Extracting the relative importance of these factors when interpreting discontinuous OSL chronologies from sand dunes has proven difficult, and is particularly hindered in contexts where the internal sedimentary structures of dunes are not visible. In this study samples for OSL dating were taken from three major dune exposures in the Rub' al Khali, United Arab Emirates, each showing clear internal structure, with the aim of addressing these problems. Specific objectives were to assess how ages of individual sedimentary units represent dune accumulation as a whole, and how the dune record in turn reflects known past environmental changes. Final ages were calculated using the OxCal software package, by incorporating the known relative stratigraphy through the application of Bayesian methods. The results show that stratigraphy alone is not sufficient at these sites to guide OSL sampling; that is, chrono- and lithostratigraphic boundaries do not necessarily coincide. Where chronological hiatuses are present, internal sediment stratigraphy can be a useful tool in identifying potential problems of under-sampling the full dune record. The implications of these findings for reconstructing Quaternary climates from dune chronologies are considered. © 2013 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60499
Appears in Collections: 过去全球变化的重建
There are no files associated with this item.
作者单位: School of Geography and the Environment, University of Oxford, South Parks Road, Oxford OX1 3QY, United Kingdom; Department of Environmental and Geographical Science, University of Cape Town, Rondebosch 7701, South Africa
Recommended Citation:
Leighton C.L.,Bailey R.M.,Thomas D.S.G.. The utility of desert sand dunes as Quaternary chronostratigraphic archives: Evidence from the northeast Rub' al Khali[J]. Quaternary Science Reviews,2013-01-01,78