Abstract
The Ysyk-Köl Basin filled with Lower Jurassic–Quaternary sedimentary rocks is the largest intermontane negative structural unit of the northern Tien Shan. The basement of this basin is composed of Precambrian–Paleozoic rocks, largely of Ordovician and Silurian granitoids exposed in mountain ranges of the basin framework and as separate anticlinal domes situated in areas occupied by the Mesozoic–Cenozoic sedimentary cover. The postmagmatic tectonic internalstructure of the Chonkurchak (Chunkurchak), Kyzyl-Choku, Kyzyl-Bulak, and Prishib massifs emplaced in the basement, as well as their relationships to the sedimentary cover, are described in the paper. The study was carried out using the morphostructural method, detailed geological mapping, structural kinematic analysis, and petrographic examination of rocks. The internalstructure of Paleozoic granites in the basement and indications of their 3D tectonic flow are characterized. It is shown that granites underwent 3D deformation after their emplacement in the consolidated crust, and this process had a substantial influence on tectonic processes at the plate and orogenic stages of regional evolution.
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Original Russian Text © M.G. Leonov, E.S. Przhiyalgovsky, E.V. Lavrushina, A.V. Poleshchuk, A.K. Rybin, 2016, published in Geotektonika, 2016, No. 4, pp. 22–47.
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Leonov, M.G., Przhiyalgovsky, E.S., Lavrushina, E.V. et al. Alpine tectonics of granites in basement of Ysyk-Köl Basin, northern Tien Shan. Geotecton. 50, 366–388 (2016). https://doi.org/10.1134/S0016852116040063
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DOI: https://doi.org/10.1134/S0016852116040063