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- Title
Geochemistry and the Sm-Nd model age of sedimentary rocks from the lower horizon of the cover in the northeastern part of the West Siberian Platform.
- Authors
Ivanov, K.; Ronkin, Yu.; Erokhin, Yu.; Pogromskaya, O.
- Abstract
The pre-Jurassic basement and lower (Jurassic) horizons of the sedimentary cover in Hole Borovaya 6 were studied. Analysis of rare and rare-earth elements shows that Jurassic sedimentary rocks were most likely formed at the expense of erosion and mixing of heterogeneous materials, namely acid sources of the Siberian Platform and Triassic riftogenic basaltoids. The variations of Sm/Nd (0.1076-0.1250) and Nd/Nd (0.512202-0.512437), as well as the Sm-Nd model ages of Jurassic sediments (1146-1362 Ma), provide certain evidence for participation of the Mesoproterozoic substrate in the formation of the rocks studied. The Sm-Nd model age of pre-Jurassic rocks (1281 Ma) is Mesoproterozoic as well. The Precambrian crystalline basement of the Siberian Platform is a likely source of these sedimentary rocks.
- Subjects
SEDIMENTARY rocks; GEOCHEMISTRY; SAMARIUM; NEODYMIUM; JURASSIC stratigraphic geology
- Publication
Doklady Earth Sciences, 2017, Vol 475, Issue 1, p788
- ISSN
1028-334X
- Publication type
Article
- DOI
10.1134/S1028334X17070133