Литосфера (Dec 2016)
Postmagmatiс tectonics of granites and morphostructure the Northern Tien Shan
Abstract
The granites are represented significant volumes (up to 50% or more) of the continental upper crust, and, certainly, they should influence on the formation of the crust structure and peculiarities of its evolution. Is generally assumed that after cooling and including in a basement composition, the granites represent the passive volumes and they are not subject to major structural changes. However, some geological data refute this view. In particular, the study of the Northern Tien Shan granites revealed that after cooling and entering the basement they have undergone intense structural reworking. Deformation expresses in cross-scale 3D disintegration of rocks, eventually leading to the emergence of huge masse of kataklasites. That tectonic reworking fundamentally changes the rheology of rocks, causing their 3D kataklastic flow. Going spatial displacement of the granite masses, the formation of domes and vertical and horizontal crystalline protrusions. Postmagmatic tectonics of the granite basement has a significant influence on the formation of tectonic and modern morphological plan of the Tien Shan region.
