辽东湾地区下第三系粘土矿物变化规律及其地质应用

本文以渤海辽东湾地区三口探井的泥岩岩屑样品的Ｘ射线衍射分析资料为依据，从粘土矿物组合，演化特征出发，论述了该地区粘土矿物，主要是蒙／伊混层矿物中蒙脱石层的转化规律，指出粘土矿物的转化主要是受温度，压力和成岩作用的控制。并根据蒙／伊混层矿物中蒙脱石层的百分含量划分四个转化带，依据这四个带对这一地区的成岩作用阶段进行了划分，进而阐明其在石油地质方面的应用。

CHANGE PATTERN OF LOWER TERTIARY CLAY MINERALS IN LIAODONG BAY AREA AND THEIR APPLICATIONS TO GEOLOGY

By using the data of X-ray diffraction analysis of clay specimens from three wells in the Liaodong Bay, and by analysing clay mineral assemblages and their evolutionary characteristics,the author discussed the change pattern of clay minerals in this area,especially that of montmorillonite layer in mixed montmorillonite/illite minerals, thought that the change pattern of clay minerals is controlled by temperature,pressure and dia-genesis, and, according to the percentage of montmorillonite in the mixed montmorillonite/illite layer,decided four pattern belts,by which stages of diagenesis in this area are divided and their applications to petroleum geology also expounded.