Abstract
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.
Highlights
The variations in structural, textural, mineralogical and geochemical characteristics in the lower to middle Jurassic siliciclastic sediments of the transect across Chanty-Argun R., Mountain Chechnya and Georgia are considered
Чанты-Аргун (Горная Чечня и Грузия), который пересекает зоны с различным типом деформаций отложений — от северной зоны с относительно слабо измененными породами до южной зоны с интенсивными деформациями слоев и развитием кливажа
The southward change in clay mineral associations, polytypical modifications of mica minerals, their crystallinity index, a.o. are observed along the transect
Summary
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. 1. Карта рельефа Большого Кавказа и расположение на ней разрезов (геологических профилей), пересекающих поле развития юрских терригенных отложений, для которых получены данные K–Ar измерений радиологического возраста пород, их текстурноструктурные и минералогические характеристики: 1–5 — профили: 1 — р. А также степень развития в породах кливажа, распределение в отложениях ассоциаций глинистых минералов, значения индекса кристалличности слюдистых минералов и их политипных модификаций, а также ряд других параметров, в пределах профиля можно выделить 4 зоны
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