Пластическая деформация и метаморфизм горных пород Южного Тянь-Шаня

E. Kozhoukharoua, M. G. Leontiev. Ductile deformation and metamorphism in Southern Tian-Shan. Early Paleozoic sequences of the Ganza-Chimtargin Massif in Southern Tian-Shan are represented by the complex of the so-called green (chlorite) schist: basic volcanics and tuffs, sandstones, siltstones and quartzites all metamorphosed in green chist facies. Metamorphic phenomena (recrystallization, differentiation and schistosity) had taken place in two stages (Paleozoic and Alpine) and developed irregularly in space and intensity. A relationship between the degree of metamorphism, the initial lithologic features of the rock and the character and intensity of: structural deformations has been observed. Most intensive structural and material transformations are bound to zones of most active ductile deformations. Therefore, the ductile deformation plays the role of a thermodynamic factor of metamorphism.