Arid
DOI10.1016/j.jaridenv.2009.10.018
Abandonment ages of alluvial landforms in the hyperarid Negev determined by luminescence dating
Porat, N.1; Amit, R.1; Enzel, Y.2,3; Zilberman, E.1; Avni, Y.1; Ginat, H.4; Gluck, D.1,2
通讯作者Porat, N.
来源期刊JOURNAL OF ARID ENVIRONMENTS
ISSN0140-1963
出版年2010
卷号74期号:7页码:861-869
英文摘要

Dating the time of abandonment of geomorphic surfaces in the arid mid latitudes is necessary for studies ranging from tectonics, landscape evolution and paleoclimate. It has often been hampered by the limited material suitable for conventional isotopic methods and the uncertainties inherent in cosmogenic radionuclide methods. We propose luminescence dating as a suitable method for dating the time of abandonment of aggradational geomorphic surfaces in the hyperarid regions. We dated the top of such surfaces with different age ranges and geomorphic settings in a sequence of alluvial fans in Nahal Shehoret in the southern Negev and in a sequence of terraces in Nahal Ze’elim and in Nahal Zin, two adjacent drainage basins in the Judean Desert, Israel. Samples were collected from beneath the gypsic horizon at a depth of 0.3-0.7 m, below which sand grains do not penetrate. Depositional ages for the uppermost beds of the landforms, which are proxies for abandonment, range from similar to 90 ka to similar to 5 ka. In all three basins, the ages are in morphostratigraphic order and agree well with relative age estimates based on soil chronosequences and on Lake Lisan levels. Abandonment ages for an individual alluvial fan cluster within +/- 10-20%, therefore it is possible to distinguish between surfaces with ages differing by more than 20%. Thus, in hyperarid areas, the luminescence methods can be used for surface dating. (C) 2009 Elsevier Ltd. All rights reserved.


英文关键词Alluvial fans Dating Desert Geomorphic surfaces Israel Luminescence Negev Terraces
类型Article
语种英语
国家Israel
收录类别SCI-E
WOS记录号WOS:000277543400016
WOS关键词SOUTHERN ARAVA VALLEY ; DEAD-SEA RIFT ; FLUVIAL TERRACES ; LATE PLEISTOCENE ; COSMOGENIC NUCLIDES ; SINGLE-ALIQUOT ; MOJAVE DESERT ; FAULT SCARPS ; WIND RIVER ; ISRAEL
WOS类目Ecology ; Environmental Sciences
WOS研究方向Environmental Sciences & Ecology
来源机构Hebrew University of Jerusalem
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/164920
作者单位1.Geol Survey Israel, IL-95501 Jerusalem, Israel;
2.Hebrew Univ Jerusalem, Inst Earth Sci, IL-91904 Jerusalem, Israel;
3.Hebrew Univ Jerusalem, Dept Geog, IL-91905 Jerusalem, Israel;
4.Maale Shaharut High Sch, Kibbutz Yotvata, Arava Valley, Israel
推荐引用方式
GB/T 7714
Porat, N.,Amit, R.,Enzel, Y.,et al. Abandonment ages of alluvial landforms in the hyperarid Negev determined by luminescence dating[J]. Hebrew University of Jerusalem,2010,74(7):861-869.
APA Porat, N..,Amit, R..,Enzel, Y..,Zilberman, E..,Avni, Y..,...&Gluck, D..(2010).Abandonment ages of alluvial landforms in the hyperarid Negev determined by luminescence dating.JOURNAL OF ARID ENVIRONMENTS,74(7),861-869.
MLA Porat, N.,et al."Abandonment ages of alluvial landforms in the hyperarid Negev determined by luminescence dating".JOURNAL OF ARID ENVIRONMENTS 74.7(2010):861-869.
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