The mineralogical, isotope (K–Ar), structural, and textural features of the Jurassic siliciclastic complex in various tectonic environments (Greater Caucasus, Chechnya, and Georgia)

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• 作者：Yu. O. Gavrilov ; Yu. V. Kushcheva ; I. V. Latysheva…
• 刊名：Moscow University Geology Bulletin
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：71
• 期：2
• 页码：137-150
• 全文大小：7,279 KB
• 刊物主题：Geology;
• 出版者：Springer US
• ISSN：1934-8436
• 卷排序：71

文摘

The variations in the structural, textural, mineralogical, and geochemical (isotope) features of Lower to Middle Jurassic siliciclastic sediments along the Chanty-Argun River in Mountainous Chechnya and Georgia are discussed. This profile transects areas with various types of deformed sediments, from the northern comparatively weakly deformed and altered zone, to the southern zone of intense deformation and cleavage. Southward along the profile, these alterations are accompanied by the evolution of clay mineral assemblages, as well as polytypic modifications of micas and their crystallinity index. Increasing intensity of rock alteration and cleavage leads to a change of the K–Ar system, which results in a substantially rejuvenated isotope age of the sediments with a simultaneous increase of their stratigraphic age.Original Russian Text © Yu.O. Gavrilov, Yu.V. Kushcheva, I.V. Latysheva, A.I. Gushchin, A.L. Sokolova, 2016, published in Vestnik Moskovskogo Universiteta. Geologiya, 2016, No. 1, pp. 27–40.