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在亚热带丘陵河谷地小流域范围内地表物质的迁移常可导致不同沉积区物质组成的变化 .从黄泥土→洪积泥砂土→培泥砂土 ,随着搬运距离的增加 ,其粘粒矿物组成发生了一系列的变化 ;高岭石逐渐下降 ,云母逐渐增加 ,蛭石渐趋下降消失 ,而绿泥石则逐渐形成 ;同时赤铁矿、针铁矿也先后下降消失 .矿物的演化与沉积物所处环境的水分条件及溶液中盐基物质和酸碱度变化有关
In the subtropical hilly valley watersheds within the scope of the surface material can often lead to changes in the different sedimentary areas of the composition of the material from the yellow clay → Hongzai silt soil → peat sand soil, with the handling distance increases, the clay mineral composition A series of changes took place; kaolinite gradually decreased, mica gradually increased, vermiculite gradually decreased and disappeared, while chlorite gradually formed; at the same time, hematite and goethite also decreased and disappeared successively. Evolution and sediment The environment of the water conditions and the solution of salt-based substances and changes in pH