STRESS-METAMORPHISM AND STRESS-METAMORPHITES IN PRECAMBRIAN OF THE LADOGA REGION
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...
Published in: | Proceedings of the Karelian Research Centre of the Russian Academy of Sciences |
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Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English Russian |
Published: |
Karelian Research Centre of the Russian Academy of Sciences
2015
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Subjects: | |
Online Access: | https://doi.org/10.17076/geo159 https://doaj.org/article/ed830d8d30b14435b0ad6ff6739b03c8 |
Summary: | 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. |
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