Arid
DOI10.1016/j.quageo.2017.06.002
Resolving problematic luminescence chronologies for carbonate- and evaporite-rich sediments spanning multiple humid periods in the Jubbah Basin, Saudi Arabia
Clark-Balzan, Laine1; Parton, Ash2,3; Breeze, Paul S.4; Groucutt, Huw S.5,6; Petraglia, Michael D.6
通讯作者Clark-Balzan, Laine
来源期刊QUATERNARY GEOCHRONOLOGY
ISSN1871-1014
EISSN1878-0350
出版年2018
卷号45页码:50-73
英文摘要

Most of the world’s presently hyper-arid desert regions have experienced previous periods of significantly higher humidity and milder environmental conditions. The timing of these ’greening events’ is critical to research upon global climatic fluctuations and for studies of hominin palaeodemography and range expansion, contraction, and extinction, but dating these climatic shifts via terrestrial sedimentary records can be difficult. Here, we outline the challenges inherent in the radiometric dating of carbonate and evaporite-rich sediments preserved in the Jubbah basin (Nefud Desert, northern Saudi Arabia), a critical area for reconstructing the evolution of local hydrological regimes across long timescales. The Jubbah basin is surrounded by sandstone jebels (bedrock outcrops), which have prevented significant leeward dune accumulation for at least 400,000 years. The sedimentary sequences in the basin indicate repeated fluctuations between arid and humid climatic conditions, and provide key hydroclimatic records for northern Arabia. Quartz OSL and feldspar pIRIR(290) luminescence measurements and radiocarbon dating efforts are reported from four palaeoenvironmental sections in the Jubbah basin. Dates from sand-rich levels are relatively unproblematic, but significant difficulties were encountered when calculating luminescence ages from carbonate and evaporite-rich sediments. Examination of the age depth profiles, elemental composition, and sedimentological characteristics of these sections indicates that both secular disequilibrium and post-depositional alteration of the sediments has resulted in inaccurate dose rate assessment for multiple samples. In particular, we suggest that multiple ground-water pulses in the Jubbah basin have caused carbonate re-precipitation and concurrent uranium enrichment in subsurface deposits, whereas ’perched’ sections (such as the carbonate-topped remnants reported elsewhere across the Nefud) seem to be free from such alteration. These difficulties highlight important considerations for the production of chronologies from comparable settings elsewhere. Careful evaluation of all results, however, yields a robust chronology indicating the presence of varying levels of groundwater from the Holocene, MIS 3, 5, and probably older sediments from MIS 7 through to 9 or 11. We therefore provide a detailed discussion of the production of a reliable chronological framework for the Jubbah basin as an exemplar of the challenges to be overcome in such settings, and the amount of information that can be derived in so doing. (C) 2017 Elsevier B.V. All rights reserved.


英文关键词Luminescence dating Quartz Feldspar Post-IR IRSL Diagenetic alteration Dose rate
类型Article
语种英语
国家Germany ; England
收录类别SCI-E ; SSCI
WOS记录号WOS:000439534200005
WOS关键词OPTICALLY STIMULATED LUMINESCENCE ; ENVIRONMENTAL DOSE-RATE ; RUB AL-KHALI ; FELDSPAR LUMINESCENCE ; SINGLE GRAINS ; NEFUD DESERT ; RADIOACTIVE DISEQUILIBRIA ; WATERLAIN SEDIMENTS ; SPHERICAL GRAINS ; IRSL SIGNALS
WOS类目Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向Physical Geography ; Geology
来源机构University of London ; University of Oxford
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/212421
作者单位1.Univ Freiburg, Inst Earth & Environm Sci, Alberstr 23-B, D-79104 Freiburg, Germany;
2.Oxford Brookes Univ, Dept Social Sci, Gibbs Bldg,Gipsy Lane, Oxford OX3 0BP, England;
3.Univ Oxford, Mansfield Coll, Oxford OX1 3TF, England;
4.Kings Coll London, Dept Geog, London WC2R 2LS, England;
5.Univ Oxford, Sch Archaeol, Res Lab Archaeol & Hist Art, Oxford OX1 2PG, England;
6.Max Planck Inst Sci Human Hist, Kahla Str 10, D-07745 Jena, Germany
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GB/T 7714
Clark-Balzan, Laine,Parton, Ash,Breeze, Paul S.,et al. Resolving problematic luminescence chronologies for carbonate- and evaporite-rich sediments spanning multiple humid periods in the Jubbah Basin, Saudi Arabia[J]. University of London, University of Oxford,2018,45:50-73.
APA Clark-Balzan, Laine,Parton, Ash,Breeze, Paul S.,Groucutt, Huw S.,&Petraglia, Michael D..(2018).Resolving problematic luminescence chronologies for carbonate- and evaporite-rich sediments spanning multiple humid periods in the Jubbah Basin, Saudi Arabia.QUATERNARY GEOCHRONOLOGY,45,50-73.
MLA Clark-Balzan, Laine,et al."Resolving problematic luminescence chronologies for carbonate- and evaporite-rich sediments spanning multiple humid periods in the Jubbah Basin, Saudi Arabia".QUATERNARY GEOCHRONOLOGY 45(2018):50-73.
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