Carboniferous bentonites from 10th Khutor deposit (Russia): composition, properties and features of genesisCarboniferous bentonites from 10th Khutor deposit (Russia): composition, properties and features of genesis Peer-Reviewed Journal Publication Δημοσίευση σε Περιοδικό με Κριτές 2023-02-082021enThis article studies the geological structure, mineralogical composition, genesis and industrial properties of bentonite of the 10th Khutor deposit (Republic of Khakassia, Russia). The deposit is confined to the coal-bearing formation of Carboniferous age and is one of the main sources of bentonite for the metallurgical and foundry industries in Russia. The samples were collected during several field seasons and were studied with XRD, SEM, DTA, XRF, FTIR, BET and CEC analysis. The deposit consists of 6 productive layers with montmorillonite of alkaline-earth type varying in content from 38 to 72%. The formation of bentonites is associated with the alteration of volcanic ash of rhyodacite and dacite composition in zones of shallow sea water - bays and lagoons. The specific conditions of the formation, like an evaporitic depositional environment with high concentrations of soluble salts and burial diagenesis, as evidenced by seams and packs of hard coal, affected the textural and surface properties of the bentonite and caused the observed low microporosity and limited illitization.http://creativecommons.org/licenses/by/4.0/Applied Clay Science215Belousov_et_al_Appl. Clay Sci._215_2021.pdfChania [Greece]Library of TUC2023-02-08application/pdf6.7 MBfree Belousov Petr Chupalenkov N. M. Christidis Georgios Χρηστιδης Γεωργιος Zakusina Olga Zakusin Sergey V. Morozov I. Chernov Mikhail Zaitseva Tatiana Tyupina Ekaterina Krupskaya Victoria V. Elsevier Bentonite Montmorillonite Genesis Volcano-sedimentary rocks Diagenetic alteration Volcanic glass