Research output: Contribution to journal › Article › peer-review
Chemostratigraphy and detrital zircon geochronology of the Neoproterozoic Khorbusuonka Group, Olenek Uplift, Northeastern Siberian platform. / Vishnevskaya, Irina A.; Letnikova, Elena F.; Vetrova, Natalia I. et al.
In: Gondwana Research, Vol. 51, 01.11.2017, p. 255-271.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Chemostratigraphy and detrital zircon geochronology of the Neoproterozoic Khorbusuonka Group, Olenek Uplift, Northeastern Siberian platform
AU - Vishnevskaya, Irina A.
AU - Letnikova, Elena F.
AU - Vetrova, Natalia I.
AU - Kochnev, Boris B.
AU - Dril, Sergei I.
N1 - Publisher Copyright: © 2017 International Association for Gondwana Research
PY - 2017/11/1
Y1 - 2017/11/1
N2 - This study provides 87Sr/86Sr, δ13C and δ18O data from the best-preserved limestone and dolomite of the Ediacaran carbonate-dominated Khorbusuonka Group of the Olenek Uplift, NE Siberian Craton, as well as detrital zircon geochronological data from both underlying and overlying sandstones. The Maastakh Formation is characterized by 87Sr/86Sr ratios of ca. 0.70822 and δ13C values between + 4.8 and + 6.0‰. 87Sr/86Sr ratios in limestones of the Khatyspyt Formation are fairly uniform, ranging from 0.70783 to 0.70806. The carbon isotopic composition slowly decreases from bottom (+ 3.7‰) to top (− 0.2‰) of section. The Sr isotopic composition of the Turkut Formation varies from 0.70824 to 0.70914, value of δ13C is about zero: − 0.7…+0.7 ‰. The youngest population of detrital zircons from Maastakh Formation indicates that these rocks were formed not later than 630 Ma. U–Pb detrital zircons data of Kessyusa Group has a single peak at about 543 Ma, which is almost identical to the earlier dating. Based on biostratigraphy and isotopic data, the Sr isotopic compositions from the Khatyspyt Formation (87Sr/86Sr = 0.70783–0.70806) represent the composition of seawater at 560–550 Ma. Such low values of 87Sr/86Sr ratio in Ediacaran water were probably caused by the quick opening of Iapetus Ocean.
AB - This study provides 87Sr/86Sr, δ13C and δ18O data from the best-preserved limestone and dolomite of the Ediacaran carbonate-dominated Khorbusuonka Group of the Olenek Uplift, NE Siberian Craton, as well as detrital zircon geochronological data from both underlying and overlying sandstones. The Maastakh Formation is characterized by 87Sr/86Sr ratios of ca. 0.70822 and δ13C values between + 4.8 and + 6.0‰. 87Sr/86Sr ratios in limestones of the Khatyspyt Formation are fairly uniform, ranging from 0.70783 to 0.70806. The carbon isotopic composition slowly decreases from bottom (+ 3.7‰) to top (− 0.2‰) of section. The Sr isotopic composition of the Turkut Formation varies from 0.70824 to 0.70914, value of δ13C is about zero: − 0.7…+0.7 ‰. The youngest population of detrital zircons from Maastakh Formation indicates that these rocks were formed not later than 630 Ma. U–Pb detrital zircons data of Kessyusa Group has a single peak at about 543 Ma, which is almost identical to the earlier dating. Based on biostratigraphy and isotopic data, the Sr isotopic compositions from the Khatyspyt Formation (87Sr/86Sr = 0.70783–0.70806) represent the composition of seawater at 560–550 Ma. Such low values of 87Sr/86Sr ratio in Ediacaran water were probably caused by the quick opening of Iapetus Ocean.
KW - Carbon isotopes
KW - Detrital zircons
KW - Ediacaran
KW - Khorbusuonka Group
KW - Northeastern Siberia
KW - Olenek Uplift
KW - Strontium isotopes
KW - CAMBRIAN TRANSITION
KW - SULFUR ISOTOPIC COMPOSITIONS
KW - U-PB
KW - STRONTIUM
KW - INTEGRATED CHEMOSTRATIGRAPHY
KW - CARBONATE
KW - LATE PRECAMBRIAN ROCKS
KW - PATOM COMPLEX
KW - INTRABASINAL CORRELATION
KW - SR
UR - http://www.scopus.com/inward/record.url?scp=85032949439&partnerID=8YFLogxK
U2 - 10.1016/j.gr.2017.07.010
DO - 10.1016/j.gr.2017.07.010
M3 - Article
AN - SCOPUS:85032949439
VL - 51
SP - 255
EP - 271
JO - Gondwana Research
JF - Gondwana Research
SN - 1342-937X
ER -
ID: 9721505