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在简述丹棱-思氵蒙冲积扇上覆粘土层的分布与特征之后,应用粒度分析方法和孢粉组合来论述其沉积环境,并尝试应用粘土矿物与土体中易累积的稳定化合物含量与淋溶系数(ba)等所代表的粘土风化程度来论证该粘土层的相对年代。
After a brief description of the distribution and characteristics of overburden strata in Danleng-Ssuon alluvial fan, the sedimentary environment was discussed by means of particle size analysis and sporo-pollen assemblage. At the same time, the content of stable compounds and clay Solubility coefficient (ba) and other representative of the degree of weathering of clay to demonstrate the relative age of the clay layer.