INVESTIGATION OF THE HYDROTHERMAL-METAMORPHOSED ROCKS OF THE NORTH-EAST PART OF THE SMALL CAUCASUS

Abstract

In the Lesser Caucasus, hydrothermal-metamorphosed rocks include secondary quartzites, alunitized, pyrophyllitized, and hematitized tuffs. Along with these processes, sericitization, chloritization, calcitization, pyritization, and epidotization took place. Processes of alunitization and kaolinization in the North-Eastern part of the Lesser Caucasus (Zaglik alunite Deposit). they are considered to be of hydrothermal origin. The deep ingredients are SO2, H2S, and H2O, which in epithermal conditions were transformed into sulfuric solutions among the tuff thickness, producing pyrometasomatic changes. Our research has shown that these secondary quartzites of the Ordubad region of the South of the Lesser Caucasus (Paragachay, Gyumushlug) are genetically different from the North-Eastern part of the Lesser Caucasus (Gedabek). The main contributing factor in their rising is kontaktnogo process of metamorphism, caused by the formation of granitoid interesoval Meghri Ordubad batholith. Features of the geological position of mineral compositions and conditions of formation testify to the manifestation of the process of formation of secondary quartzites.