Early Riphean Billyakh Group of the Anabar Uplift, North Siberia : C–O Isotopic Geochemistry and Pb–Pb Age of Dolomites. / Gorokhov, I. M.; Kuznetsov, A. B.; Semikhatov, M. A.; Vasil’eva, I. M.; Rizvanova, N. G.; Lipenkov, G. V.; Dubinina, E. O.
In: Stratigraphy and Geological Correlation, Vol. 27, No. 5, 01.09.2019, p. 514-528.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Early Riphean Billyakh Group of the Anabar Uplift, North Siberia
T2 - C–O Isotopic Geochemistry and Pb–Pb Age of Dolomites
AU - Gorokhov, I. M.
AU - Kuznetsov, A. B.
AU - Semikhatov, M. A.
AU - Vasil’eva, I. M.
AU - Rizvanova, N. G.
AU - Lipenkov, G. V.
AU - Dubinina, E. O.
N1 - Publisher Copyright: © 2019, Pleiades Publishing, Ltd. Copyright: Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2019/9/1
Y1 - 2019/9/1
N2 - Abstract: The U and Pb contents and C, O, and Pb isotopic compositions are determined for dolomites of the Billyakh Group (6 and 15 samples of the Kotuikan and Yusmastakh formations, respectively), which composes the upper part of the Riphean section of the Anabar Uplift of North Siberia. The δ13С and δ18O values of dolomites vary from –3.0 to +0.8‰ PDB and from 23.7 to 27.3‰ SMOW, respectively, and are in agreement with those of carbonate sediments 1600–1400 Ma in age. On the 206Pb/204Pb–207Pb/204Pb plot, 18 data points of all samples of both formations occur along a straight line which corresponds to the age of 1513 ± 35 Ma. The Pb–Pb age of dolomites is a first direct geochronological characteristic of sedimentary rocks of the Anabar uplift cover and, along with the previously published Rb–Sr age of glauconite of the underlying Ust’-Il’ya Formation, allows us to ascribe the entire sedimentary sequence of the Billyakh Group to the Lower Riphean. These results indicate relatively fast (~10 m.y.) terrigenous-carbonate sedimentation of this group prior to intrusion of dolerites of the Kotui complex and origination of the Mesoproterozoic Kuonamka igneous province on the Siberian Craton. New data close a discussion on the age position of Riphean sediments of the Anabar Uplift.
AB - Abstract: The U and Pb contents and C, O, and Pb isotopic compositions are determined for dolomites of the Billyakh Group (6 and 15 samples of the Kotuikan and Yusmastakh formations, respectively), which composes the upper part of the Riphean section of the Anabar Uplift of North Siberia. The δ13С and δ18O values of dolomites vary from –3.0 to +0.8‰ PDB and from 23.7 to 27.3‰ SMOW, respectively, and are in agreement with those of carbonate sediments 1600–1400 Ma in age. On the 206Pb/204Pb–207Pb/204Pb plot, 18 data points of all samples of both formations occur along a straight line which corresponds to the age of 1513 ± 35 Ma. The Pb–Pb age of dolomites is a first direct geochronological characteristic of sedimentary rocks of the Anabar uplift cover and, along with the previously published Rb–Sr age of glauconite of the underlying Ust’-Il’ya Formation, allows us to ascribe the entire sedimentary sequence of the Billyakh Group to the Lower Riphean. These results indicate relatively fast (~10 m.y.) terrigenous-carbonate sedimentation of this group prior to intrusion of dolerites of the Kotui complex and origination of the Mesoproterozoic Kuonamka igneous province on the Siberian Craton. New data close a discussion on the age position of Riphean sediments of the Anabar Uplift.
KW - dolomites
KW - Riphean
KW - Siberian platform
KW - U–Pb geochronology
UR - http://www.scopus.com/inward/record.url?scp=85073217963&partnerID=8YFLogxK
U2 - 10.1134/S0869593819050022
DO - 10.1134/S0869593819050022
M3 - Article
AN - SCOPUS:85073217963
VL - 27
SP - 514
EP - 528
JO - Stratigraphy and Geological Correlation
JF - Stratigraphy and Geological Correlation
SN - 0869-5938
IS - 5
ER -
ID: 75951030