Arid
DOI10.1016/j.geomorph.2014.05.007
Al-26/Be-10 dating of an aeolian dust mantle soil in western New South Wales, Australia
Fisher, Adrian1; Fink, David2; Chappell, John3; Melville, Michael1
通讯作者Fisher, Adrian
来源期刊GEOMORPHOLOGY
ISSN0169-555X
EISSN1872-695X
出版年2014
卷号219页码:201-212
英文摘要

Aeolian dust mantle soils are an important element of many landscapes in south-eastern Australia, though the age of these aeolian deposits has not been radiometrically determined. At Fowlers Gap in western New South Wales, surface cobbles of silcrete and quartz overlie a stone-free, aeolian dust mantle soil, which has a thickness of about 1.6 m. The clay-rich aeolian dust deposit in turn lies upon a buried silcrete and quartz stone layer. Modelling in-situ cosmogenic Al-26 and Be-10 concentrations measured in both the surface quartz stones and in the buried quartz layer of rocks, reveals that each has experienced a complex exposure-burial history. Due to the absence of quartz stones or sand at intermediate depths, our cosmogenic Al-26 and Be-10 modelling was not able to determine a definitive mechanism of stone pavement formation and stone burial. Various scenarios of stone formation, transport, burial and exhumation were tested that constrain the age of the deposit to range from 0.9 +/- 0.2 Ma to 1.8 +/- 0.2 Ma, based largely on different assumptions taken for the time-dependency of the net sedimentation rate. This corresponds with the initiation of the Simpson Desert dune fields and the deflation of lakes in central Australia, which probably responded to the shift to longer-wavelength, larger-amplitude Quaternary glacial cycles at around 1 Ma. Sensitivity analyses were carried out to identify those parameters which better constrained model outputs. Within model errors, which largely are the result of analytical errors in measured Al-26 and Be-10 concentrations, all three competing theories of colluvial wash, upward displacement of stones, and cumulic pedogenesis are possible mechanisms for the formation of the surface stone pavement. (C) 2014 Elsevier B.V. All rights reserved.


英文关键词Cosmogenic nuclides Aluminium-26 Beryllium-10 Aeolian dust Stony deserts Quaternary palaeoclimate
类型Article
语种英语
国家Australia
收录类别SCI-E
WOS记录号WOS:000339775100017
WOS关键词BE-10 PRODUCTION-RATE ; DESERT LOAM SOILS ; IN-SITU ; COSMOGENIC EXPOSURE ; LANDSCAPE EVOLUTION ; BARRIER RANGE ; DEPOSITS ; AL-26 ; ARIDITY ; RATES
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/2XILL650/182292
作者单位1.Univ New S Wales, Sch Biol Earth & Environm Sci, Sydney, NSW 2052, Australia;
2.Australian Nucl Sci & Technol Org, Inst Environm Res, Menai, NSW 2234, Australia;
3.Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT 0200, Australia
推荐引用方式
GB/T 7714
Fisher, Adrian,Fink, David,Chappell, John,et al. Al-26/Be-10 dating of an aeolian dust mantle soil in western New South Wales, Australia[J],2014,219:201-212.
APA Fisher, Adrian,Fink, David,Chappell, John,&Melville, Michael.(2014).Al-26/Be-10 dating of an aeolian dust mantle soil in western New South Wales, Australia.GEOMORPHOLOGY,219,201-212.
MLA Fisher, Adrian,et al."Al-26/Be-10 dating of an aeolian dust mantle soil in western New South Wales, Australia".GEOMORPHOLOGY 219(2014):201-212.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Fisher, Adrian]的文章
[Fink, David]的文章
[Chappell, John]的文章
百度学术
百度学术中相似的文章
[Fisher, Adrian]的文章
[Fink, David]的文章
[Chappell, John]的文章
必应学术
必应学术中相似的文章
[Fisher, Adrian]的文章
[Fink, David]的文章
[Chappell, John]的文章
相关权益政策
暂无数据
收藏/分享

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。