Rb-Sr and K-Ar indicators of the transformation of precambrian clayey rocks in the East European Platform

Rb-Sr and K-Ar characteristics of Vendian and Upper Riphean sections in various structural units of the East European Platform are studied. It is shown that Neoproterozoic clayey rocks of the platform underwent postsedimentary transformations, primarily owing to processes of K accumulation (illitiza...

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Bibliographic Details
Published in:Lithology and Mineral Resources 2009-03, Vol.44 (2), p.174-182
Main Authors: Vinogradov, V. I., Bujakaite, M. I., Golovin, D. I., Kushcheva, Yu. V., Ivanov, Yu. A., Teslenko, V. N., Pashicheva, O. I.
Format: Article
Language:English
Subjects:
Earth and Environmental Science
Earth Sciences
Geology
Mineral Resources
Mineralogy
Minerals
Rocks
Sedimentology
Studies
Online Access:Get full text
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Summary:Rb-Sr and K-Ar characteristics of Vendian and Upper Riphean sections in various structural units of the East European Platform are studied. It is shown that Neoproterozoic clayey rocks of the platform underwent postsedimentary transformations, primarily owing to processes of K accumulation (illitization). Their intensity decreases with depth and isotopic signatures of provenance rocks are partly retained in Riphean rocks. Stages of the most active transformations approximately 400 and 600 Ma ago are manifested in the Vendian clayey rocks. Events of approximately 1000 Ma ago are recorded in Riphean rocks of the East European Platform. The least altered rocks of the Pachelma aulacogen can retain ancient hydrocarbon pools.
ISSN:0024-4902
1608-3229
1573-8892
DOI:10.1134/S0024490209020059