Arid
DOI10.1016/j.quascirev.2010.12.015
Palaeoenvironmental change recorded in the palaeodunefields of the western Murray Basin, South Australia - New data from single grain OSL-dating
Lomax, J.1,2; Hilgers, A.2; Radtke, U.2,3
通讯作者Lomax, J.
来源期刊QUATERNARY SCIENCE REVIEWS
ISSN0277-3791
出版年2011
卷号30期号:5-6页码:723-736
英文摘要

This study is concerned with the reconstruction of the palaeoenvironmental history of southeastern Australia for the last similar to 300 ka by establishing a luminescence chronology of dune sand deposition in the western Murray Basin (South Australia). In the study area, vast fields of palaeodunes, stabilised by vegetation, provide evidence of past environmental change. In total 98 samples were collected from dune sand layers at 13 different dune sections. The time of their deposition was determined using optically stimulated luminescence dating of single quartz grains, accounting for the impact of post-depositional mixing by the use of a finite mixture model. The oldest depositional phase demonstrates that dune sand layers of great antiquity are preserved in the western Murray Basin, ranging up to at least 380 ka. Phases of substantial dune sand deposition were identified for the periods 18-38 ka and 63-72 ka. Older depositional phases also exist, but are poorly resolved due to relatively large errors of the luminescence ages. Aeolian deposition during the last termination and the Holocene is relatively limited, with a slight clustering of ages at the time of the Antarctic Cold Reversal and from 5-8 ka. Two modern ages give evidence of very recent dune sand deposition. Comparison with other palaeoclimate records from the region suggests that phases with high aeolian sedimentation coincide with more arid conditions and breaks in the dune record with more humid phases. Thus, although dune records are often discontinuous and their interpretation in palaeoclimatic terms is not always straightforward, the palaeodunes of the western Murray Basin show a good preservation of phases of aeolian activity and provide useful information for palaeoenvironmental reconstruction. (C) 2010 Elsevier Ltd. All rights reserved.


英文关键词Single grain luminescence dating SE-Australia Murray Basin Quaternary Palaeodunes Semi-arid environments
类型Article
语种英语
国家Austria ; Germany
收录类别SCI-E
WOS记录号WOS:000288840000015
WOS关键词LINEAR DUNE ACCUMULATION ; SOUTHEASTERN AUSTRALIA ; EASTERN AUSTRALIA ; LATE PLEISTOCENE ; THERMO-LUMINESCENCE ; CLIMATE VARIABILITY ; AEOLIAN LANDFORMS ; HUMAN OCCUPATION ; LAKE BUNGUNNIA ; SEA SEDIMENTS
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/2XILL650/170235
作者单位1.Univ Nat Resources & Life Sci, Inst Appl Geol, A-1190 Vienna, Austria;
2.Univ Cologne, Inst Geog, D-50923 Cologne, Germany;
3.Univ Duisburg Essen, D-45141 Essen, Germany
推荐引用方式
GB/T 7714
Lomax, J.,Hilgers, A.,Radtke, U.. Palaeoenvironmental change recorded in the palaeodunefields of the western Murray Basin, South Australia - New data from single grain OSL-dating[J],2011,30(5-6):723-736.
APA Lomax, J.,Hilgers, A.,&Radtke, U..(2011).Palaeoenvironmental change recorded in the palaeodunefields of the western Murray Basin, South Australia - New data from single grain OSL-dating.QUATERNARY SCIENCE REVIEWS,30(5-6),723-736.
MLA Lomax, J.,et al."Palaeoenvironmental change recorded in the palaeodunefields of the western Murray Basin, South Australia - New data from single grain OSL-dating".QUATERNARY SCIENCE REVIEWS 30.5-6(2011):723-736.
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