摘要
海拉尔盆地扎赉诺尔群是一套多物源的陆相碎屑沉积。泥岩的粘土矿物由高岭石、伊利石、蒙脱石和混合层粘土矿物组成。其中高岭石在粘土矿物中的变化从小于10%到大于50%。该变化在纵向上具有明显的旋回性,分层界线清晰。在横向上十分稳定,不同沉积相带的泥岩均可对比。这种变化反映了沉积过程中古气候性质从干旱—湿润的旋回性变化。为地层对比提供了新的依据。
In Hailaer Basin, Zhalainoer Group is composed of a sevies of continental clastic sediments of multiple sources. Clay minerals in the mudstones consist of kaolinite, illite, montrorilonite and mixed-layers clay minerals. Among them the content of kaolinite ranges from<10% to>50%. The variations are rhythmically in vertical. The mudstones of different facies can be compared. The study shows that the variations represent the rhythmic alterations of arid and bumid palaeoclimates. And they provide new basis for the stratigraphic correlations.
出处
《矿物岩石》
CAS
CSCD
1989年第3期41-47,共7页
Mineralogy and Petrology
