STRESS-METAMORPHISM AND STRESS-METAMORPHITES IN PRECAMBRIAN OF THE LADOGA REGION

• Published in: Proceedings of the Karelian Research Centre of the Russian Academy of Sciences
• Main Authors: Алексей Львович Кулаковский, Юрий Алексеевич Морозов, Анна Игоревна Смульская, Alexey Kulakovsky, Yury Morozov, Anna Smul'skaya
• Format: Article in Journal/Newspaper
• Language: English; Russian
• Published: Karelian Research Centre of the Russian Academy of Sciences 2015
• Subjects: стресс; метаморфизм; приладожье; Science; Q; karelian
• Online Access: https://doi.org/10.17076/geo159; https://doaj.org/article/ed830d8d30b14435b0ad6ff6739b03c8

The tectonites confined to fault zones with abnormally high, up to 12 kbar, pressures, which appear to be the products of stress-metamorphism of relatively late stage of deformation-metamorphic evolution, are identified in the regionally metamorphosed Precambrian rocks of the Ladoga region. Most of these stress-metamorphites are localized in the Meyeri tectonic zone, separating the Svecofennian and Karelian geoblocks. The features of structure and composition of the two groups of stress-metamorphites belonging to the different stages of the deformation-metamorphic phase are described. Some parameters and trends in stress-metamorphism of each stage are defined.