Arid
DOI10.1016/j.geoderma.2016.11.028
The geochemistry of calcareous forest soils in Sulaimani Governorate, Kurdistan Region, Iraq
Rate, Andrew W.1; Sheikh-Abdullah, Shuela M.2
通讯作者Rate, Andrew W.
来源期刊GEODERMA
ISSN0016-7061
EISSN1872-6259
出版年2017
卷号289页码:54-65
英文摘要

The properties of and processes in calcareous soils are important in the context of dryland soil management and moderation of atmospheric CO2 by carbonate weathering. This study was conducted to determine the major and trace elemental composition in soils of the Kurdistan region of Iraq, and their geochemical features. Soil samples were taken from seven pedons, five of them from forest soils and two others from non-cultivated soils. Selected physical properties, total concentrations of elements and mineralogical properties were determined on samples from each horizon. Weathering processes in the soils are characterised by loss of Ca, Sr and several trace elements, and accumulation of less mobile elements such as Zr, Ti, and Al. The progress of carbonate weathering was best expressed using Ba/Sr and Rb/Sr ratios. Principal components analysis confirmed that distinctive geochemical differences for two profiles (significantly higher Mg, Co, Cr, Mn, and Ni) were likely to represent control by parent material, a conclusion reinforced by both mineralogical differences and the location of profiles relative to surficial geology. The other main geochemical processes differentiating the pedons were chemical weathering of carbonates and accumulation of residual elements. Calculation of absolute mass flux (tau) values showed that, for some profiles, concentration of mobile elements such as Na and K by evapotranspiration was potentially important, despite evidence for clay eluviation in most profiles. Absolute loss of several elements was also correlated with increased weathering as measured by Ba/Sr ratios. None of the forest soils showed enrichment-depletion (tau) profiles for Fe or Al consistent with podzolisation. This study highlights useful geochemical approaches to understanding chemical weathering and pedogenesis in calcareous soil profiles. (C) 2016 Elsevier B.V. All rights reserved.


英文关键词Geochemistry Chemical weathering Calcareous soils Forest soils Kurdistan
类型Article
语种英语
国家Australia ; Iraq
收录类别SCI-E
WOS记录号WOS:000392771300007
WOS关键词WESTERN-AUSTRALIA ; PEDOGENESIS ; DESERT ; CONSUMPTION ; TRANSECT ; LOESS ; TRACE
WOS类目Soil Science
WOS研究方向Agriculture
来源机构University of Western Australia
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/199199
作者单位1.Univ Western Australia, Sch Geog & Environm Sci, 35 Stirling Highway, Crawley, WA 6009, Australia;
2.Univ Sulaimani, Fac Agr Sci, Sch Soil & Water Sci, Bakrajo, Iraq
推荐引用方式
GB/T 7714
Rate, Andrew W.,Sheikh-Abdullah, Shuela M.. The geochemistry of calcareous forest soils in Sulaimani Governorate, Kurdistan Region, Iraq[J]. University of Western Australia,2017,289:54-65.
APA Rate, Andrew W.,&Sheikh-Abdullah, Shuela M..(2017).The geochemistry of calcareous forest soils in Sulaimani Governorate, Kurdistan Region, Iraq.GEODERMA,289,54-65.
MLA Rate, Andrew W.,et al."The geochemistry of calcareous forest soils in Sulaimani Governorate, Kurdistan Region, Iraq".GEODERMA 289(2017):54-65.
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