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Implications of Local Tectogenesis for the Deformation of Layered Sequences in the Tajik Depressionстатья
Информация о цитировании статьи получена из
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 10 августа 2018 г.
- Авторы: Lukk A.A., Shevchenko V.I.
- Журнал: Izvestiya. Physics of the Solid Earth
- Том: 40
- Номер: 11
- Год издания: 2004
- Издательство: Pleiades Publishing, Inc.
- Местоположение издательства: New York, USA
- Первая страница: 897
- Последняя страница: 916
- Аннотация: Abstract — Stresses of subhorizontal compression oriented across the strike of tectonic structures formed, as many researchers believe, due to the convergence of the Eurasian and Indian plates have been previously established from focal mechanisms of earthquakes and geological data in the crust of the Tajik depression located in the Garm geodynamic research area of the UIPE. We proposed an additional local mechanism to account for the deformation of the layered rock sequence of the depression. Developing the existing concepts, the present paper addresses results of the reconstruction of seismotectonic deformation from data on focal mechanisms of earthquakes {M > 1) that occurred in the axial zone of the depression at depths of 25-35 km. These results indicate that, at these depths, rocks of the layered sequence of the depression divergently moved apart in a subhorizontal direction. This pattern is confirmed by repeated geodetic measurements made at the Earth’s surface over a fairly long time interval. It is suggested that such spreading can be due to an increase in the volume of the layered sequence due to supply of additional mineral material by deep fluids from the lower crust and possibly from the upper mantle. The stresses of subhorizontal outward pressure caused by these factors can be regarded as stresses of subhorizontal compression.
- Добавил в систему: Лукк Альберт Артурович