Tectonic stress of the southeastern part of the Gorny Altai
Data on the stress-strain state of the rocks in the area of the Chuya and Kuray depressions located in the southeastern part of the Gorny Altai were obtained using field tectonophysical methods. The characteristics of local stress tensors obtained at the field observation points were used to deter...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Дальневосточного отделения Российской академии наук, Южно-Сахалинск, Федеральное государственное бюджетное учреждение науки Институт морской геологии и геофизики
2024-12-01
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| Series: | Геосистемы переходных зон |
| Subjects: | |
| Online Access: | http://journal.imgg.ru/web/full/f2024-4-2.pdf |
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| Summary: | Data on the stress-strain state of the rocks in the area of the Chuya and Kuray depressions located in the
southeastern part of the Gorny Altai were obtained using field tectonophysical methods. The characteristics of local
stress tensors obtained at the field observation points were used to determine the averaged regional stress field
responsible for the formation of the regional tectonic structure. The tectonic position of the area in a complex node
of the concentration of faults and various paleofacial zones determines the nature of the single averaged stress field.
In the area of the Chuya and Kuray depressions, the maximum horizontal compression was revealed, which is
established at the local level and the level of the regional stress field of the three observation sites. The deviation
from the submeridional direction of tectonic stress, which is general for the Gorny Altai, and the increased number
of stress regimes of horizontal extension compared to other parts of the region are associated, in our opinion, with
WSW regional dextral strike-slip structures and a change in the type of stress regime within the superimposed
Cenozoic depressions. Such variations in the stress field characteristics are noted not only for paleostress inversion
but also for the changes occurring as a result of the development of modern seismic processes and related
earthquakes in this seismically active region of the Gorny Altai. |
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| ISSN: | 2541-8912 2713-2161 |