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对辽宁省朝阳市5个具有代表性的第四纪古红土剖面进行了深入研究。研究结果显示:朝阳古红土的pH值、阳离子交换量、盐基饱和度高,个别古红土剖面出现钙质结核,表明该古红土是多元发生土壤。与朝阳市地带性土壤———褐土相比,其发育程度远高于褐土,说明其较黄土母质发育的褐土形成年代更为久远。与浙江第四纪红土相比,朝阳古红土虽然铁在B层和土体中聚积、土壤颜色一致,但铁游离度低,ba值、黏粒硅铝铁率、硅铝率、黏粒CEC高,说明该古红土脱硅富铁铝作用较弱,发育程度不深,远不如南方红土发育成熟。
In this paper, five representative Quaternary palaeosol sections in Chaoyang City, Liaoning Province are studied in depth. The results show that pH, cation exchange capacity and basal saturation of ancient laterite in Chaoyang are high, and calcareous nodules appear in some ancient laterite sections, indicating that this ancient laterite is a multi-occurring soil. Compared with the zonal soil of Chaoyang City --- Cinnamon soil, its development degree is much higher than that of cinnamon soil, indicating that the formation of cinnamon soil is longer than that of loess parent material. Compared with the Quaternary red clay in Zhejiang, although the ancient ancient laterite in the Chaoyang area accumulates in the B layer and the soil, the color of the soil is the same, but the iron freeness is low, the Ba value, the rate of clay, High, indicating that the desilication of the ancient iron-rich iron and aluminum is weak, the development is not deep, far less mature southern red clay.