黏土矿物组成对天山北坡土壤变性特征的影响

发布时间：2018-04-27 12:40

本文选题：变性土 + 蒙皂石　；参考：《新疆农业科学》2017年02期

【摘要】：【目的】调查天山北坡是否分布有变性特征的土壤,通过测定其黏土矿物组成,探讨新疆变性土壤发育的内在矿物学机制。【方法】使用传统野外调查方法,研究天山北坡11个土壤剖面,根据裂隙、滑擦面、楔状结构等诊断特性的发育状况划分其变性化程度。测定了研究剖面28个土壤发生层的线胀系数和黏土矿物中蒙皂石的含量,并探讨其相关性。【结果】研究的11个土壤剖面中有4个剖面可相对划分为强变性化的土壤,28个土层蒙皂石含量的平均值为38%。强变性化程度土壤中蒙皂石的含量显著高于弱变性化程度的土壤。蒙皂石含量与线胀系数之间存在极显著的幂函数关系。【结论】较低的蒙皂石含量是决定本研究调查的土壤变性化程度不高的内在原因。未来在新疆开展变性土调查时,需要重点考虑蒙皂石含量高的成土母质分布区。
[Abstract]:[Objective] to investigate the soil which is denatured in the northern slope of Tianshan Mountain, and to explore the intrinsic mineralogical mechanism of the denatured soil development in Xinjiang by measuring its clay mineral composition. [Methods] the traditional field investigation method was used to study 11 soil profiles on the north slope of the Tianshan Mountain, and the diagnostic characteristics such as fracture, sliding surface and wedge-shaped structure were studied. The degree of denaturation was divided. The coefficient of linear expansion of 28 soil layer and the content of montmorillonite in clay minerals were measured, and its correlation was discussed. [results] 4 sections of the 11 soil profiles studied could be divided into strong denatured soil, and the average value of the content of the 28 soil layers was 38%. strong denaturation process. The content of montmorillonite in the soil is significantly higher than that of the weakly denatured soil. There is a very significant power function relationship between the content of smectite and the coefficient of linear expansion. [Conclusion] the lower content of the montmorillonite is the intrinsic reason for the low degree of denaturation of the soil in this study. In the future, it is necessary to focus on the investigation of the denatured soil in Xinjiang. The distribution area of the soil parent material with high content of montmorillonite is considered.

【作者单位】：新疆农业大学草业与环境科学学院/新疆土壤与植物生态过程重点实验室;
【基金】：国家自然科学基金青年基金项目“新疆天山北坡土壤变性特征与形成”(41301231) 国家科技基础性工作专项“新疆维吾尔自治区土系调查与土系志编制”(2014FY110200A03)~~
【分类号】：S151.9

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