Full text loading...
-
Paleotectonic reconstruction of the East European Craton in the Proterozoic (according to paleomagnetic data)
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 16th International Conference on Geoinformatics - Theoretical and Applied Aspects, May 2017, Volume 2017, p.1 - 5
Abstract
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 ( Elming et al., 2001 ). 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 ( Elming et al., 2001 ) were calculated, and paleotectonic reconstructions of the relative position of these megablocks in the time interval of 1770–1750 Ma.