Accumulation and Post-Sedimentary Diagenesis of Tonsteins   总被引：2，自引：0，他引：2  

Admakin  L. A. 《Lithology and Mineral Resources》2002,37(1):60-67

The work is devoted to specific features of sedimentogenesis and multistage alterations of eolian volcanic ash and epiclastic clay in paleopeat bogs and their transformation into ortho- and paratonsteins, respectively. The hydrolysis of aluminosilicate minerals and volcanic glass and their alteration into monotonous submonomineral clay, which is compositionally similar to epiclastic clay, is associated with the diagenesis stage. During the catagenesis, submonomineral clay is lithified and transformed into tonsteins, which undergo recrystallization as the temperature increases. Clay minerals are replaced by illite and chlorite, while tonsteins are transformed into metatonsteins. Paragenetic relationships of clay minerals are discussed.  相似文献   

Lithogenetic Indicators of Tonsteins     

L. A. Admakin 《Lithology and Mineral Resources》2001,36(1):23-32

Lithogenetic indicators are considered for the subdivision of tonsteins (with respect to their initial composition) into orthotonsteins, which are products of the diagenesis of volcanic ash, and paratonsteins, which are products of the sedimentation of dispersed kaolinic material. Diagnostic criteria include the association of stable and pseudomorphosed protominerals, relic textures, specific features of coal bed (morphology, continuity, and distribution of tonstein interlayers in the vertical section of a coal bed), titanium modulus, and paragenesis of tonsteins with genetically related rocks of the coal-bearing formation. Geological factors, which control the distribution of the genetic types of tonstein in coal beds of different basins, are outlined.  相似文献   

Overview of Studies and the Modern Knowledge of Tonsteins (on the Occasion of the 150th Anniversary since the Beginning of Their Investigation)     

P. P. Timofeev  L. A. Admakin 《Lithology and Mineral Resources》2002,37(3):228-238

This work reviews the history of tonstein investigation and development of relevant lithogenetic ideas. Actual problems of further studies are formulated.  相似文献   

Statistical Allocation of the Parageneses of Minor Elements from the Associations in Fossil Coals     

Admakin  L. A.  Parada  S. G. 《Doklady Earth Sciences》2019,485(1):260-263

Doklady Earth Sciences - The statistical relationships characterizing the concentrations of minor elements in the organic part and mineral impurities in fossil coals are allocated. The confidence...  相似文献