论文部分内容阅读
采用x射线衍射分析方法,对辽宁地区发育于不同母质上的古红土的粘土矿物特性进行了研究,结果表明:辽宁各种母质发育的古红土的粘土矿物中都含有伊利石、1.4nm过渡矿物和高岭石,片麻岩和千枚岩发育古红土中还含有较多量的蛭石,第四纪水成沉积物发育的古红土中含有少量的蒙脱石。辽宁古红土粘土矿物的组成反映了不同于现代成土环境的古环境特征,现代的环境条件对古红土的某些性质已经产生了影响。在辽宁各种母质发育的古红土的粘土矿物组成中,1.4nm过渡矿物的地位比较突出,片麻岩发育的古红土的蛭石含量也很突出,有着不同于南方和黄土高原的特点。从土壤发育程度上讲,相似母质发育的辽宁古红土低于南方红壤,同黄土高原古土壤的发育程度基本相当。
The characteristics of clay minerals of ancient laterites developed in different parent materials in Liaoning Province were studied by x-ray diffraction analysis. The results show that the clay minerals of ancient laterite with various parent materials in Liaoning contain illite, 1.4nm transitional minerals And kaolinite, gneiss and phyllite development of ancient laterite also contains a larger amount of vermiculite, ancient Quaternary sediments paleosol that contains a small amount of montmorillonite. The composition of the ancient lateritic clay minerals in Liaoning reflects the paleoenvironmental features that are different from those of the modern soil-forming environment. The modern environmental conditions have had some impact on some properties of the ancient laterite. In the clay mineral composition of ancient laterite developed in various parent materials in Liaoning Province, the position of 1.4nm transitional mineral is prominent, and the vermiculite content of ancient laterite developed in gneiss is also prominent, which is different from the features of the southern and loess plateau. From the perspective of soil development, ancient paleosol in Liaoning Province with similar parent materials is lower than red soil in the South China, and is similar to the ancient soil in the Loess Plateau.