EGU21-14264
https://doi.org/10.5194/egusphere-egu21-14264
EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Relative movements of the Bashkirian megazone blocks(the South Urals) according to paleomagnetic data.

Maiia Anosova1, Anton Latyshev1,2, and Alexey Khotylev1
Maiia Anosova et al.
  • 1Lomonosov Moscow State University, Geological Faculty, Department of Regional, Geology and the Earth's History, Moscow, Russian Federation (mai.anosova@yandex.ru)
  • 2Institute of Physics of the Earth RAS, Moscow, Russian Federation

     The research object is magmatic bodies from the southern, central and northern parts of the Bashkirian megazone (the Southern Urals, meridian length of the Bashkirian megazone - 300 km). Most of the study intrusions have the Riphean age. In the Riphean the Bashkirian megazone was part of the East European craton. And in the Late Paleozoic rocks of the Bashkirian megazone were involved in the collision process. The formation of most studies bodies is associated with the Mashak magmatic event (the Riphean), which marks the collapse of the super-continent Nuna.

     The Middle Paleozoic component was isolated in 28 bodies. Probably it is the secondary component, that is widespread on the Southern Urals and has been repeatedly identified by other researchers. Directions comparison from different districts showed that there was a rotation of the southern, northern and central blocks of Bashkirian megazone relative to each other during the Late Paleozoic collision. At the same time, paleomagnetic directions from the northern regions (which are about 40-50 km apart from each other) statistically coincide or differ not so much. Which means that they were stable or relatively stable.

     Besides, the Riphean component was isolated and the paleomagnetic pole for the boundary of the Lower and Middle Riphean of the East European Craton (1349+/-11 Ma) is calculated from 8 thin sheet intrusions. Plat=8.4; Plong=162.4; A95=4.1.

How to cite: Anosova, M., Latyshev, A., and Khotylev, A.: Relative movements of the Bashkirian megazone blocks(the South Urals) according to paleomagnetic data., EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-14264, https://doi.org/10.5194/egusphere-egu21-14264, 2021.

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