Composition and isotopic characteristic of gneyss-granit of the Chechek Dome structure (Irtysh Shear Zone, East Kazakhstan)

Abstract

The paper presents geochemical and isotopic characteristics of gneyss-granite of the Chechek dome structure that located in Irtysh Shear Zone. It shows that all “granitoid” of Chechek structure have a similar composition. Reconstruction of primary substrate is based on this data. It was found that gneyss-granite protolith is silty-sandy sediments Kalba-Narym basin from D2 to C1. Nd model age of the protolith responds meso- and neoproterozoic (1.0-1.1 GA), which is consistent with the model ages of high metamorphic and sedimentary rocks that are located in the Irtysh Shear Zone.

Keywords

• геохимия
• протолит
• метаморфизм
• гранитообразование
• зона смятия
• сдвиговая зона
• купольная структура
• иртышская и чечекская зоны смятия
• восточный казахстан
• geochemistry
• petrochemistry
• protolith
• metamorphism
• granite
• irtysh shear zone
• domed structure
• east kazakhstan