Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/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 |
ISSN | 0140-1963 |
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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