CHARACTERISTICS OF SEDIMENTRARY PETROGRAPHY IN CARBONIFEROUS EVENTS OF WESTERN SHANDONG

The characteristics of efflata in the Permo-carboniferous coal-bearing measures of the western Shandong are analyzed. The results show that pyroclasts are dominated by crystal clasts. The main volcanic arenites include tuff, sedimentary tuff, tuffaceous lithoclast, tuffaceous sandstone and tuffaceous siltage. The shapes and chemical components of cosmic dust in the coal-layers of Taiyuan group are studied. Compared with the related materials nationlly and internationally, the cosmic dust in the study area can be considered as siliceous glass-bead. In addition, this article puts forward that volcanic and asrtogeological events happeded in the study area in Carboniferous period.