干旱区生态环境知识资源中心(Arid): Origin of Smectite in Salinized Soil of Junggar Basin in Xinjiang of China

Arid

DOI	10.3390/min9020100
	Origin of Smectite in Salinized Soil of Junggar Basin in Xinjiang of China
	Xie, Haixia 1,2; He, Shuai 3; Huang, Chuanqin 1; Tan, Wenfeng 1
通讯作者	Tan, Wenfeng
来源期刊	MINERALS
EISSN	2075-163X
出版年	2019
卷号	9 期号:2
英文摘要	In this paper, salinized soils with different degrees of salinity are sampled in Junggar Basin of Xinjiang of China. The X-ray diffraction, transmission electron microscopy, and inductively coupled plasma mass spectrometry are employed to investigate the morphology and distribution characteristics of smectite in salinized soil profiles. In the salinized soil profiles of this region, crystals of smectite are poor where lattice fringes are not parallel. In all soil layers, the content of smectite in the soil increases with the decrease in content of illite, which has demonstrated significant negative correlation (r = 0.79, n = 50, p < 0.01) between illite and smectite. This phenomenon has demonstrated that illite may be transformed into smectite in salinized soils of studied regions. In general, the transformation process of illite to smectite is affected by climate condition. The O-18 values of secondary carbonate in the 0-10 cm soil layers is higher than that in deep soil layers, which indicates that O-18 concentrates in surface soil and reflects temperature rise during soil layer formation. The C-13 values of secondary carbonate and soil organic matter in 0-10 cm soil layers are higher than that in deep soil layers. It indicates that C-4 plants were the main plants, which reflects that the climate was relatively dry during the formation of the surface soil. Thus, the climate during the surface soil formation is arid, which is not conducive for leaching K+ from illite of the 0-10 cm soil to form smectite. As a result, the content of the smectite becomes lowest in the soil surface. In the relative humid condition of deep soil layers, the K+ of the illite of the soil would be relative easily leached and more smectite may be formed. Furthermore, the presence of salt in the salinized soil would promote the formation of smectite in Junggar Basin of Xinjiang. A lot of Ca2+, Na+ and Mg2+ in the soil solution of salinized soils would enter into the illite and occupy K+ positions. The studied result shows that the amount of smectite would increase with the increase of salt below 10 cm of the soil layer, where the amount of smectite would be significantly correlated with soil electrical conductivity (r = 0.64, n = 39, p < 0.01). In the Junggar Basin in Xinjiang, therefore, the salinized soil below 10 cm would have the necessary water conditions and chemical components for illite transformation to smectite.
英文关键词	smectite illite transformation salinized soil Junggar Basin
类型	Article
语种	英语
国家	Peoples R China
开放获取类型	Green Submitted, gold
收录类别	SCI-E
WOS记录号	WOS:000460799000034
WOS关键词	SALT-AFFECTED SOILS ; CLAY-MINERALS ; STABLE CARBON ; GENESIS ; TRANSFORMATION ; ISOTOPES ; RECORDS ; ILLITE
WOS类目	Geochemistry & Geophysics ; Mineralogy ; Mining & Mineral Processing
WOS研究方向	Geochemistry & Geophysics ; Mineralogy ; Mining & Mineral Processing
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217623
作者单位	1.Huazhong Agr Univ, Key Lab Arable Land Conservat Middle & Lower Reac, Minist Agr, Wuhan 430070, Hubei, Peoples R China; 2.Shihezi Univ, Agr Coll, Xinjiang 832000, Peoples R China; 3.Xinjiang Acad Agr Reclamat Sci, Shihezi 832000, Xinjiang, Peoples R China
推荐引用方式 GB/T 7714	Xie, Haixia,He, Shuai,Huang, Chuanqin,et al. Origin of Smectite in Salinized Soil of Junggar Basin in Xinjiang of China[J],2019,9(2).
APA	Xie, Haixia,He, Shuai,Huang, Chuanqin,&Tan, Wenfeng.(2019).Origin of Smectite in Salinized Soil of Junggar Basin in Xinjiang of China.MINERALS,9(2).
MLA	Xie, Haixia,et al."Origin of Smectite in Salinized Soil of Junggar Basin in Xinjiang of China".MINERALS 9.2(2019).