Vol 8, (1977)

Details

Category: Vol 8, (1977)

• Pennsylvanian
• kaolin depostits
• geology
• Czech
• Horní Bříza
• Plzeň Basin
• Kaznějov

Authors: Jiří Jiránek

 Full version (4,605 kB)

 Abstract: The kaolin sediments of two largest kaolin deposits in the Plzen basin have been categorized according to their grain size into six petrological types. By semiquantitative analyses an admixture of quartz and micaceous material has been established in washed kaolins; chemical analyses of washed kaolins and tables showing the content of selected trace elements are given. Some technological properties of washed kaolins (viscosity, dry strength) depend on their grain size. The evidence concerning the genesis of the kaolins of these deposits testifies to the prevailing kaolinization in the source area of the sediment; partial kaolinization processes taking place during the Cretaceous-Tertiary times cannot be entirely excluded. The causes of coloration of these kaolins are primary as well as secondary.