1887

Abstract

Summary

For the Paleoproterozoic rocks of the Korsun-Novomirgorodsky pluton (anorthosites and gabbro-anorthosites), Novoukrainsky and Korsun-Shevchenkovsky massifs (rapakivi granites) which are part of the Ingul megablock, new laboratory determinations of paleomagnetic parameters were carried out. Based on the data obtained within the Ingul megablock, the positions of the averaged paleomagnetic poles were calculated for 1750 Ma (the pole coordinates are Ф = 22.5°, Л = 167.3°, dp/dm = 4.0°/7.7°) and 1770 Ma (Ф = -3.6°, Λ = 156.3°, dp/dm = 3.3°/5.3°), as well as the paleomagnetic pole for 2037.4±0.6 Ma (Ф = 43.5°, Λ = 141.6°). The obtained poles are in good agreement with those obtained earlier for the coeval complexes of the Northwest megablock ( ). Based on the available paleomagnetic poles, the kinematic parameters (latitudinal drift velocity and rotation speed of the blocks) for the Ukrainian Shield (Ingul and Northwestern megablocks) and Fennoscandia ( ) were calculated, and paleotectonic reconstructions of the relative position of these megablocks in the time interval of 1770–1750 Ma.

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/content/papers/10.3997/2214-4609.201701887
2017-05-15
2024-03-28
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