PALEOMAGNETISM OF THE VOLYN AND MOGILEV-PODOLIA VENDIAN SERIES OF THE SOUTH-WESTERN PART OF THE EAST-EUROPEAN PLATFORM
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dc.contributor.author | Glevasskaya A.M. | |
dc.contributor.author | Mikhailova N.P. | |
dc.contributor.author | Kravchenko S.N. | |
dc.date.accessioned | 2021-03-02T07:41:51Z | |
dc.date.available | 2021-03-02T07:41:51Z | |
dc.date.issued | 2001 | |
dc.identifier | https://elibrary.ru/item.asp?id=27762018 | |
dc.identifier.citation | Geophysical Journal, 2001, 20, 2, 149-175 | |
dc.identifier.issn | 0275-9128 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/26022 | |
dc.description.abstract | On the basis of T- and AF-demagnetisation carried out in the course of studies of Neo-Proterozoic paleobasalts (of the Volyn Series, Lower Vendian) and terrigenous rocks (of the Grushki Suite, Lower Vendian and of the Mogilev-Podolia Series, Upper Vendian) from outcrops of the Volyn and Podolia Peridniester regions (the SW part of the EEP), three main NRM components were identified. This was confirmed by magnetic-mineralogical data. Component A was characterised by inverse polarity. Its VGPs, localised at high latitudes in the Northern hemisphere, coincided with Scandinavia's southern paleopoles for 600-530 my. Component B is almost antiparallel to component A. It corresponds to some short events of normal polarity in the Early and Late Vendian. Component C, whose paleopoles are located at near-equatorial lattitudes, is probably associated with later remagnetisation of the original NRM. The carriers of magnetisation components A and B in basalts are homogeneous accessory titanomagnetites (TM), whose Curie points (TC) lie in the 260-320 °C range. The magnetic phases with TC > 550 °C appearing in some basalts of North Volyn have been caused by high-temperature oxidation during a more recent volcanic activity period of the central type. The hypothesis of a genetic link existing between such oxidation, high-temperature remagnetisation of basalts and the high concentration of native copper in them, is substantiated. Some tectonic aspects of the problem are discussed. | |
dc.subject | Vendian | en |
dc.title | PALEOMAGNETISM OF THE VOLYN AND MOGILEV-PODOLIA VENDIAN SERIES OF THE SOUTH-WESTERN PART OF THE EAST-EUROPEAN PLATFORM | |
dc.type | Статья | |
dc.subject.age | Precambrian::Proterozoic::Neoproterozoic::Vendian | en |
dc.subject.age | Докембрий::Протерозой::Неопротерозойская::Вендский | ru |
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