Kazan Federal University Digital Repository

Variations of the <sup>238</sup>U/<sup>235</sup>U Isotope Ratio in Metasedimentary Rocks and Evidence of Changes in Sedimentation Conditions during the Ediacarian Period of the Neoproterozoic

Show simple item record

dc.contributor.author Chugaev A.
dc.contributor.author Chernyshev I.
dc.contributor.author Budyak A.
dc.contributor.author Mandzhieva G.
dc.contributor.author Sadasyuk A.
dc.contributor.author Gareev B.
dc.date.accessioned 2020-01-21T20:45:18Z
dc.date.available 2020-01-21T20:45:18Z
dc.date.issued 2019
dc.identifier.issn 1028-334X
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/157726
dc.description.abstract © 2019, Pleiades Publishing, Ltd. Abstract: The isotopic composition of uranium is a new geochemical indicator that facilitates reconstruction of the redox conditions of geological processes. In this paper the results of study of the 238U/235U isotope ratio in the Neoproterozoic metasedimentary rocks of the Baikal–Patom fold belt (Northern Transbaikalia) were obtained using the MC-ICP-MS method and 235U + 236U double spike. The scale of 238U/235U ratio variations (δ238U = –0.37 to –0.11‰) is within the range of (–0.39 to +0.15‰), typical of metasedimentary terrigenous rocks of marine origin. In terms of the δ238U values, uranium of the BPB rocks studied is heavier than seawater uranium (δ238U = –0.41 ± 0.03). There is a correlation between the δ238U value in the rocks and their position in the stratigraphic section. Variations of the 238U/235U ratio in the terrigenous-carbonate sequences of BPB indicate that the sedimentation conditions changed and euxinic conditions were established in the course of evolution of the paleobasin in the Late Ediacarian period.
dc.relation.ispartofseries Doklady Earth Sciences
dc.title Variations of the <sup>238</sup>U/<sup>235</sup>U Isotope Ratio in Metasedimentary Rocks and Evidence of Changes in Sedimentation Conditions during the Ediacarian Period of the Neoproterozoic
dc.type Article
dc.relation.ispartofseries-issue 2
dc.relation.ispartofseries-volume 484
dc.collection Публикации сотрудников КФУ
dc.relation.startpage 167
dc.source.id SCOPUS1028334X-2019-484-2-SID85064907028


Files in this item

This item appears in the following Collection(s)

  • Публикации сотрудников КФУ Scopus [22633]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

Show simple item record

Search DSpace


Advanced Search

Browse

My Account