Arid
DOI10.1016/j.quageo.2010.06.002
Constraining the evolution of river terraces with integrated OSL and cosmogenic nuclide data
Guralnik, Benny1; Matmon, Ari1; Avni, Yoav2; Porat, Naomi2; Fink, David3
通讯作者Guralnik, Benny
来源期刊QUATERNARY GEOCHRONOLOGY
ISSN1871-1014
出版年2011
卷号6期号:1页码:22-32
英文摘要

We present a framework for consistent incorporation of optically-stimulated luminescence dates with cosmogenic radionuclide concentrations measured in a single alluvial section, and apply it on two late Quaternary terraces in the Negev Desert, Israel, to derive constraints on their evolution. We solve an integrated, self-consistent and co-dependant set of equations to reproduce either dataset based on three model parameters of (i) uniform cosmogenic inheritance, (ii) constant terrace aggradation rate and (iii) subsequent exposure time. A subset of all possible parameter combinations, which approximates the measurements within the uncertainties of their best-fits, yields a better constraint of the alluvial history than that obtained by any of these dating proxies alone. The derived set of common solutions indicates similar paleo-inheritances of similar to 1 x 10(5) (10)Be atoms g(-1) in both terraces; progressive deposition of the higher terrace (T2) began at similar to 250 ka, lasted for a period of similar to 80 ka, was abandoned at similar to 170 ka and since that time has remained intact; the lower terrace (T1) was most likely deposited at similar to 3 ka and rapidly abandoned by similar to 2 ka. In an alternative interpretation for 12, which treats the two geochronometers separately, this terrace might have experienced discrete events of aggradation at (216 +/- 13) ka and deep truncation at 118(-29)(+42) ka, significantly separated in time. In the currently active channel of the Neqarot canyon, contemporary stripping of the lowest terrace located along the stream is suggested by decreasing values of (10)Be downstream along the river channel. (c) 2010 Elsevier B.V. All rights reserved.


英文关键词OSL Cosmogenic isotopes ((10)Be) Intercomparison of dating proxies Aggradation rate Cosmogenic inheritance
类型Article
语种英语
国家Israel ; Australia
收录类别SCI-E
WOS记录号WOS:000285433300003
WOS关键词OPTICALLY STIMULATED LUMINESCENCE ; SEDIMENT PRODUCTION ; DRAINAGE-BASIN ; EROSION RATES ; EXPOSURE AGES ; BE-10 ; AL-26 ; DESERT ; QUARTZ ; REGION
WOS类目Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向Physical Geography ; Geology
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/2XILL650/170181
作者单位1.Hebrew Univ Jerusalem, Inst Earth Sci, IL-91904 Jerusalem, Israel;
2.Geol Survey Israel, IL-95501 Jerusalem, Israel;
3.Australian Nucl Sci & Technol Org, Menai, NSW 2234, Australia
推荐引用方式
GB/T 7714
Guralnik, Benny,Matmon, Ari,Avni, Yoav,et al. Constraining the evolution of river terraces with integrated OSL and cosmogenic nuclide data[J]. Hebrew University of Jerusalem,2011,6(1):22-32.
APA Guralnik, Benny,Matmon, Ari,Avni, Yoav,Porat, Naomi,&Fink, David.(2011).Constraining the evolution of river terraces with integrated OSL and cosmogenic nuclide data.QUATERNARY GEOCHRONOLOGY,6(1),22-32.
MLA Guralnik, Benny,et al."Constraining the evolution of river terraces with integrated OSL and cosmogenic nuclide data".QUATERNARY GEOCHRONOLOGY 6.1(2011):22-32.
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