Postmagmatiс tectonics of granites and morphostructure the Northern Tien Shan

2016

Литосфера, Vol 0, Iss 6, Pp 5-32 (2016)

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.

article

English
Russian

A.N. Zavaritsky Institute of Geology and Geochemistry, 2016.

граниты, дезинтеграция, морфоструктура, объемная деформация, ороген, тектоника, тектоническое течение, Тянь-Шань, фундамент, basement, granite, disintegration, 3D deformation, orogen, structure, tectonics, tectonic flow, Tien Shan, Engineering geology. Rock mechanics. Soil mechanics. Underground construction, TA703-712