Open AccessMineralogical, isotopic (K-Ar) and structural-textural characteristics of the Jurassic terrigenous complex in different paleotectonic settings (Greater Caucasus, Chechnya - Georgia)
Author(s) -
Yu. О. Gavrilov,
Yu. V. Kushcheva,
И. В. Латышева,
А. И. Гущин,
Alla L Sokolova
Publication year - 2016
Publication title -
vestnik moskovskogo universiteta. seriâ 4, geologiâ
Language(s) - English
Resource type - Journals
ISSN - 0579-9406
DOI - 10.33623/0579-9406-2016-1-27-40
Subject(s) - transect , terrigenous sediment , geology , siliciclastic , radiometric dating , cleavage (geology) , geochemistry , mica , paleontology , mineralogy , sedimentary rock , sedimentary depositional environment , oceanography , structural basin , fracture (geology)
The variations in structural, textural, mineralogical and geochemical (radiometric) characteristics in the lower to middle Jurassic siliciclastic sediments of the transect across Chanty-Argun R., Mountain Chechnya and Georgia are considered. This transect crosses areas of different types of deformations from northern zone of weak deformation to southern zone of intensive deformation and cleavage. The southward change in clay mineral associations, polytypical modifications of mica minerals, their crystallinity index, a.o. are observed along the transect. The increase of intensity of secondary alternations of the rocks and dimensions of cleavage enabled the change in K-Ar-system. This is resulted in significantly younger values of measured radiologic age corresponding to older stratigraphic age.