SECULAR VARIATIONS OF THE UPPER CRUST COMPOSITION: IMPLICATION OF GEOCHEMICAL DATA ON THE UPPER PRECAMBRIAN SHALES FROM THE SOUTHERN URALS WESTERN FLANK AND UCHUR-MAYA REGION
- DSpace Home
- →
- Геология России
- →
- ELibrary
- →
- View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.
dc.contributor.author | Maslov A.V. | |
dc.contributor.author | Ronkin Yu.L. | |
dc.contributor.author | Krupenin M.T. | |
dc.contributor.author | Podkovyrov V.N. | |
dc.contributor.author | Gareev E.Z. | |
dc.contributor.author | Gorozhanin V.M. | |
dc.date.accessioned | 2024-07-14T10:19:04Z | |
dc.date.available | 2024-07-14T10:19:04Z | |
dc.date.issued | 2006 | |
dc.identifier | https://elibrary.ru/item.asp?id=13505264 | |
dc.identifier.citation | Stratigraphy and Geological Correlation, 2006, 14, 2, 126-149 | |
dc.identifier.issn | 0869-5938 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/44416 | |
dc.description.abstract | In the mid-1980s, it was concluded based on geochemical study that Th, Sc, La concentrations and ratios Th/Sc, La/Sc and Eu/Eu* did not wary significantly in the post-Archean time. It was impossible to judge about compositional variations of upper crust during the Riphean and Vendian, because data of that time characterized a limited number of samples from the post-Archean basins of Australia, New Zealand, and Antarctic. Considered in this work are variations of Eu/Eu*, LREE/ HREE, Th/Sc, and La/Sc ratios in Upper Precambrian fine-grained siliciclastic rock of the Southern Urals western flank (Bashkirian meganticlinorium) and Uchur-Maya region (Uchur-Maya plate and Yudoma-Maya belt). As is established, only the Eu anomaly in the studied siliciclastic rocks is practically identical to this parameter of the average post-Archean shale. Three other parameters plot on the Riphean-Vendian variation curves with positive and negative excursions of diverse magnitude, which do not coincide always in time. It is assumed that these excursions likely mark stages of local geodynamic activity, destruction of pre-Riphean cratons, and progressing recycling of sedimentary material during the Riphean. © MAIK "Nauka/Interperiodica" 2006. | |
dc.subject | BASHKIRIAN MEGANTICLINORIUM | |
dc.subject | ISOTOPIC GEOCHEMISTRY | |
dc.subject | LATE PRECAMBRIAN | |
dc.subject | PECULIARITIES OF FINE-GRAINED SILICICLASTIC SEDIMENTS | |
dc.subject | UCHUR-MAYA PLATE | |
dc.subject | YUDOMA-MAYA BELT | |
dc.title | SECULAR VARIATIONS OF THE UPPER CRUST COMPOSITION: IMPLICATION OF GEOCHEMICAL DATA ON THE UPPER PRECAMBRIAN SHALES FROM THE SOUTHERN URALS WESTERN FLANK AND UCHUR-MAYA REGION | |
dc.type | Статья | |
dc.identifier.doi | 10.1134/S086959380602002X | |
dc.subject.age | Precambrian::Archean | |
dc.subject.age | Precambrian::Proterozoic::Riphean | |
dc.subject.age | Precambrian::Proterozoic::Neoproterozoic::Vendian |
Files in this item
This item appears in the following Collection(s)
-
ELibrary
Метаданные публикаций с сайта https://www.elibrary.ru