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对成都盆地3061个浅层土壤样品以元素为变量进行F回归分析,在回归模型的基础上进行因子分析,并选取因子载荷较大的元素作为特征元素组合。在结合元素地球化学性质、区域地质背景和因子得分等值线图的基础上,根据特征元素组合来研究F的来源。研究结果表明:①成都盆地浅层土壤中F的来源有6种,其中岷江流经地区出露的酸性岩浆岩、碱性岩和龙门山前陆盆地上三叠统、侏罗系、白垩系沉积岩系是成都盆地浅层土壤中F的主要来源;②F在表生作用过程中显著地发生了迁移,岷江冲积扇成为其富集的“储库”;③自然作用对成都盆地浅层土壤中F的分布特征有显著的影响。
Fractional variables were used to analyze 3061 shallow soil samples in Chengdu basin. Factor analysis was carried out on the basis of regression model, and the elements with large factor loadings were selected as the characteristic element combinations. Based on the contour map of element geochemistry, regional geological background and factor score, the source of F is studied according to the combination of eigen elements. The results show that: (1) There are six sources of F in the shallow soil of Chengdu basin, including acidic magmatic rocks, alkaline rocks and the Upper Triassic, Jurassic and Cretaceous Sedimentary rock series are the main source of F in the shallow soil of Chengdu basin; ②F obviously migrated in epigenetic process, and the Minjiang alluvial fan became its enriched “reservoir”; ③Natural effect on F in the shallow soil of Chengdu basin F distribution has a significant impact.