昆明盆区第四系粘性土中的粘土矿物与地面沉降

用X衍射和扫描电镜法研究了昆明盆区第四系粘性土中粘土矿物的矿物学、微结构等特征，讨论了在地下水抽汲导致物理化学条件变化的情况下，粘土矿物微结构的改变对地面沉降灾害效应的影响，认为粘土矿物含量与微结构是在相同外界条件下引起地面沉降差异的主因。

Clay Minerals in Quaternary Clayey Soil and Its Relation to the Land Subsidencein Kunming Basin Area

Based on X-ray diffraction and scanning electron microscopic analyses of Quaternary clayey soil from Kunming basin area, the authors have extensively studied the combination, mineralogy and micro-textures of the clay minerals, and discussed the relationship between the clay minerals and the land subsidence under the overdraft of the groundwater which may alter the combination, micro-textures and physicochemical conditions of the clay minerals. The results show that, under the same condition, the content, mineral combination and micro-textures of the clay minerals play most important roles in leading to land subsidence.