Arabian Journal of Geosciences, ( ISI ), Volume (10), No (12), Year (2017-6) , Pages (1-13)

Title : ( Discrimination of sand dunes and loess deposits using grain-size analysis in northeastern Iran )

Authors: Alireza Karimi Karouyeh , Farhad Khormali , Xin Wang ,

Access to full-text not allowed by authors

Citation: BibTeX | EndNote

Identification and characterization of aeolian deposits in arid environments provide information on mechanisms of loess and sand accumulation. The objectives of this study were to (i) identify the distribution of aeolian deposits, (ii) discriminate loess and sand deposits using granulometric data, and (iii) describe the aeolian deposition in Sarakhs area, northeastern Iran. Particle size distributions of 26 surface samples were determined using a laser grain-size analyzer. Fine sand, very fine sand, and very coarse silt were dominant fractions in studied sediments, and the sum of these fractions ranged from 46.9% in loess deposits to 93.8% in sand dunes. The mean grain size (Mz) of sand dunes ranged from 3.31 to 3.54ϕ, which gradually changed to 4.09 to 5.50 ϕin loess deposits. Sorting, skewness, and kurtosis ranged from 0.84 to 1.94ϕ, 0.18 to 0.49, and 0.76 to 2.38, respectively. Aeolian deposits in the area resulted in the incorporation of Hariroud River system and Kopeh DaghMountains for aeolian particle production and accumulation.Alluvial comminution in Hariroud River is suggested the main mechanism of sand and silt production and flood plain environment the main reservoir of these particles. The mountains of Kopeh Dagh act as a barrier and play a key role for sand and loess accumulation.

Keywords

, Loess, Sand dune, KopehDagh, Sorting,
برای دانلود از شناسه و رمز عبور پرتال پویا استفاده کنید.

@article{paperid:1063314,
author = {Karimi Karouyeh, Alireza and Farhad Khormali and Xin Wang},
title = {Discrimination of sand dunes and loess deposits using grain-size analysis in northeastern Iran},
journal = {Arabian Journal of Geosciences},
year = {2017},
volume = {10},
number = {12},
month = {June},
issn = {1866-7511},
pages = {1--13},
numpages = {12},
keywords = {Loess; Sand dune; KopehDagh; Sorting; Skewness},
}

[Download]

%0 Journal Article
%T Discrimination of sand dunes and loess deposits using grain-size analysis in northeastern Iran
%A Karimi Karouyeh, Alireza
%A Farhad Khormali
%A Xin Wang
%J Arabian Journal of Geosciences
%@ 1866-7511
%D 2017

[Download]