Constraints on the Neogene – Quaternary geodynamics of the Southern Urals: comparative study of neotectonic data and results of strength and strain modeling along the URSEIS profile

Mikhailov, V.O.; Tevelev, A.V.; Berzin, A.G.; Kiseleva, E.A.; Smolyaninova, E.I.; Suleimanov, A.K.; Timoshkina, E.P.

Авторы: Mikhailov V.O., Tevelev A.V., Berzin A.G., Kiseleva E.A., Smolyaninova E.I., Suleimanov A.K., Timoshkina E.P.
Сборник: Mountain Building in the Uralides: Pangea to the Present
Серия: Geophysical Monogrhaph Series
Том: 132
Год издания: 2002
Первая страница: 273
Последняя страница: 286
DOI: 10.1029/132GM14
Аннотация: Much geological and geomorphologic evidence indicates that the modern topography of the Southern Urals has been formed during the Neogene – Quaternary due to superposition of, (1) NW-SE compression and asymmetric uplift of the area as a whole, and (2) more vigorous transpressive uplift of the Central and Western Uralian blocks in the Late Pliocene – Quaternary. Strength modeling based on data on the deep structure, temperature and composition of the crust revealed that the Western and Central Uralian blocks are characterized by low total strength. Numerical strain modeling showed that vertical Neogene -Quaternary movements of the area can be a consequence of intraplate compression, maximum deformation being concentrated in weak blocks. The model predicts different deformational style in the upper and lower parts of inhomogeneous Uralide crust: the zone of maximum deformation at the top of the crust occurs in the Main Uralian fault zone while, in the lower crust, it is shifted 70 km to the west, where a vertical Moho offset (the so-called Makarovo fault) is located. Thus, this fault could have developed (or at least been sufficiently renewed) during Neogene -Quaternary.
Добавил в систему: Тевелев Аркадий Вениаминович

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Constraints on the Neogene – Quaternary geodynamics of the Southern Urals: comparative study of neotectonic data and results of strength and strain modeling along the URSEIS profileстатья

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