Arid
DOI10.1016/j.quascirev.2010.04.014
Loess and floods: High-resolution multi-proxy data of Last Glacial Maximum (LGM) slackwater deposition in the Flinders Ranges, semi-arid South Australia
Haberlah, David1; Williams, Martin A. J.2; Halverson, Galen1; McTainsh, Grant H.3; Hill, Steven M.1; Hrstka, Tomas4; Jaime, Patricio5; Butcher, Alan R.5; Glasby, Peter2
通讯作者Haberlah, David
来源期刊QUATERNARY SCIENCE REVIEWS
ISSN0277-3791
出版年2010
卷号29期号:19-20页码:2673-2693
英文摘要

Terrace remnants of late Pleistocene fine-grained valley-fill deposits (Silts) deeply entrenched by ephemeral traction load streams in arid areas remain a puzzle. They have been attributed to a variety of origins ranging from lacustrine to alluvial floodplains. We here report a centimetre-scale multi-proxy study of a 7 m section of Silts in the semi-arid Flinders Ranges of South Australia, which span the lead-up to and peak of the Last Glacial Maximum (LGM). The results of detailed lithostratigraphic mapping, high-resolution parametric particle-size analysis, Automated Mineralogy, induced magnetic susceptibility, carbon stable isotope geochemistry, and a chronostratigraphy based on 27 AMS radiocarbon and 6 luminescence ages are discussed in terms of sediment provenance, depositional environment and weathering history with the aim of reconstructing the regional palaeo-environment. The data are consistent with a fluctuating aeolian-fluvial interplay dominating the extended LGM environment with a greater impact on the landscape than all combined geomorphic processes since then. Accordingly, weathered slope mantles and loess accessions were eroded and entrained by numerous small and at least a dozen large-scale flood events, and trapped in an intra-montane floodplain extending into Brachina Gorge. Upstream of this narrow constriction, recurrent backflooding is discussed resulting in a thick sequence of layered to laminated slackwater couplets. Aggradation and degradation of valley-fills appear to be largely controlled by fine-sediment supply from the valley slopes, replenished by wind-blown dust from upwind playa lakes and source-bordering dunefields. In conclusion, this study demonstrates how dust storms and flooding rains can account for ’pluvial’ features previously explained by the opposing effects of reduced precipitation and evaporation in the colder more arid glacial landscape of southern Australia. (c) 2010 Elsevier Ltd. All rights reserved.


类型Article
语种英语
国家Australia ; Czech Republic
收录类别SCI-E
WOS记录号WOS:000281360500019
WOS关键词CLIMATIC CONTROLS ; ATMOSPHERIC CO2 ; KUISEB RIVER ; NAMIB DESERT ; LAKE FROME ; QUATERNARY ; LUMINESCENCE ; CHRONOLOGY ; SEDIMENTS ; TERRESTRIAL
WOS类目Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向Physical Geography ; Geology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/166189
作者单位1.Univ Adelaide, Sch Earth & Environm Sci, Ctr Tecton Resources & Explorat TRaX, Adelaide, SA 5005, Australia;
2.Univ Adelaide, Sch Social Sci, Adelaide, SA 5005, Australia;
3.Griffith Univ, Atmospher Environm Res Ctr, Brisbane, Qld 4111, Australia;
4.Acad Sci Czech Republ, Inst Geol, VVI, Prague 16500 6, Czech Republic;
5.FEI Ctr Excellence Automated Mineral, Brisbane, Qld 4064, Australia
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GB/T 7714
Haberlah, David,Williams, Martin A. J.,Halverson, Galen,et al. Loess and floods: High-resolution multi-proxy data of Last Glacial Maximum (LGM) slackwater deposition in the Flinders Ranges, semi-arid South Australia[J],2010,29(19-20):2673-2693.
APA Haberlah, David.,Williams, Martin A. J..,Halverson, Galen.,McTainsh, Grant H..,Hill, Steven M..,...&Glasby, Peter.(2010).Loess and floods: High-resolution multi-proxy data of Last Glacial Maximum (LGM) slackwater deposition in the Flinders Ranges, semi-arid South Australia.QUATERNARY SCIENCE REVIEWS,29(19-20),2673-2693.
MLA Haberlah, David,et al."Loess and floods: High-resolution multi-proxy data of Last Glacial Maximum (LGM) slackwater deposition in the Flinders Ranges, semi-arid South Australia".QUATERNARY SCIENCE REVIEWS 29.19-20(2010):2673-2693.
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