scholarly journals Terreneuvian stratigraphy and faunas from the Anabar Uplift, Siberia.

2017 ◽  
Vol 62 ◽  
Author(s):  
Artem Kouchinsky ◽  
Stefan Bengtson ◽  
Ed Landing ◽  
Michael Steiner ◽  
Michael Vendrasco ◽  
...  
Keyword(s):  
Anabar Uplift

Carbon isotope stratigraphy and the problem of a pre-Tommotian Stage in Siberia

2001 ◽  
Vol 138 (4) ◽  
pp. 387-396 ◽  
Author(s):  
ARTEM KOUCHINSKY ◽  
STEFAN BENGTSON ◽  
VLADIMIR V. MISSARZHEVSKY ◽  
SHANE PELECHATY ◽  
PETER TORSSANDER ◽  
...  
Keyword(s):  
Carbon Isotope ◽  
Siberian Platform ◽  
Lower Cambrian ◽  
Isotopic Data ◽  
Sequence Stratigraphic ◽  
Anabar Uplift ◽  
Carbon Isotopic ◽  
The North ◽  
Isotope Stratigraphy ◽  
Isotopic Variations

Carbon isotopic oscillations are useful to elucidate the stratigraphy and biogeochemical events around the Precambrian–Cambrian transition. New isotopic data from the Manykaj and Emyaksin formations of the eastern Anabar Uplift (Siberia) help to correlate the Lower Cambrian and Neoproterozoic–Cambrian transitional beds across the Siberian Platform. The similarity of trends and amplitudes of the carbon isotopic curves, together with biostratigraphic and sequence-stratigraphic markers from the Anabar Uplift, provide a precise correlation with the southern part of the Siberian Platform. Diagenesis of argillaceous limestones of the Emyaksin Formation has apparently not affected the primary isotopic variations. The resulting curve is nearly identical in sections about 100 km apart in the Tommotian–Atdabanian portion of the formation. Relatively frequent and pronounced isotopic oscillations in the lower beds of the Emyaksin Formation fit between features I and II of the southern Siberian isotopic reference scale but are undetected therein owing to the depositional hiatus at the base of the Tommotian Stage in its type section. This confirms the transgressive onlap from the north suggested by previous studies, and makes the appearance of the Cambrian skeletal fossils on the Siberian Platform less abrupt. The hiatus in the south appears to embrace at least two biostratigraphic zones as recognized in the north. The case is strengthened for a pre-Tommotian Cambrian Stage in Siberia, the biostratigraphic framework for which has been elaborated earlier.

Structural and Crystal-Chemical Features and Rb–Sr Age of Globular Glauconite in the Ust-Il’ya Formation (Lower Riphean, Anabar Uplift)

2020 ◽  
Vol 55 (6) ◽  
pp. 468-485
Author(s):  
T. S. Zaitseva ◽  
T. A. Ivanovskaya ◽  
B. A. Sakharov ◽  
B. B. Zviagina ◽  
O. V. Dorzhieva
Keyword(s):  
Crystal Chemical ◽  
Anabar Uplift ◽  
Lower Riphean

Early Riphean Billyakh Group of the Anabar Uplift, North Siberia: C–O Isotopic Geochemistry and Pb–Pb Age of Dolomites

2019 ◽  
Vol 27 (5) ◽  
pp. 514-528
Author(s):  
I. M. Gorokhov ◽  
A. B. Kuznetsov ◽  
M. A. Semikhatov ◽  
I. M. Vasil’eva ◽  
N. G. Rizvanova ◽  
...  
Keyword(s):  
Anabar Uplift ◽  
Isotopic Geochemistry ◽  
North Siberia

New Paleomagnetic and isotopic data on the Mesoproterozoic igneous complex on the northern slope of the Anabar uplift

2006 ◽  
Vol 411 (1) ◽  
pp. 1190-1194 ◽  
Author(s):  
R. V. Veselovskiy ◽  
P. Yu. Petrov ◽  
S. F. Karpenko ◽  
Yu. A. Kostitsyn ◽  
V. E. Pavlov
Keyword(s):  
Northern Slope ◽  
Isotopic Data ◽  
Igneous Complex ◽  
Anabar Uplift

Paleobiology of the Mesoproterozoic Billyakh Group, Anabar Uplift, Northern Siberia

1995 ◽  
Vol 69 (S39) ◽  
pp. 1-37 ◽  
Author(s):  
V. N. Sergeev ◽  
A. H. Knoll ◽  
J. P. Grotzinger
Keyword(s):  
New Species ◽  
Cell Differentiation ◽  
New Combinations ◽  
Anabar Uplift ◽  
Eukaryotic Diversity ◽  
Exceptional Preservation ◽  
Northeastern Siberia ◽  
Complex Forms ◽  
A Minor ◽  
Peritidal Carbonates

Silicified peritidal carbonates of the Mesoproterozoic Kotuikan and Yusmastakh Formations, Anabar Uplift, northeastern Siberia, contain exceptionally well-preserved microfossils. The assemblage is dominated by ellipsoidal akinetes of nostocalean cyanobacteria (Archaeoellipsoides) and problematic spheroidal unicells (Myxococcoides); both are allochthonous and presumably planktonic. The assemblage also includes distinctive mat-forming scytonematacean and entophysalidacean cyanobacteria, diverse short trichomes interpreted as cyanobacterial hormogonia or germinated akinetes, rare longer trichomes, and several types of colonial unicells. Although many taxa in the Kotuikan-Yusmastakh assemblage are long-ranging prokaryotes, the overall character of the assemblage is distinctly Mesoproterozoic, with its major features shared by broadly coeval floras from Canada, China, India, and elsewhere in Siberia.Microfossils also occur in middle to inner shelf shales of the Ust’-Il'ya and lower Kotuikan Formations. Leiosphaerid acritarchs (up to several hundred microns in diameter) characterize this facies. As in other Mesoproterozoic acritarch assemblages, acanthomorphic and other complex forms that typify Neoproterozoic assemblages are absent.The combination in Billyakh assemblages of exceptional preservation and low eukaryotic diversity supports the hypothesis that nucleated organisms diversified markedly near the Mesoproterozoic–Neoproterozoic boundary. The assemblages also demonstrate the antiquity of cyanobacteria capable of cell differentiation and suggest the importance of both changing peritidal substrates and evolving eukaryotes in determining stratigraphic patterns of Proterozoic prokaryotes. The permineralized assemblage contains 33 species belonging to 17 genera. Ten new species or new combinations are proposed:Archaeoellipsoides costatusn. sp.,A. elongatusn. comb.,A. dolichosn. comb.,A. minorn. nom.,A. crassusn. comb.,A. majorn. comb.,A. bactroformisn. sp.,Veteronostocale mediumn. sp.,Filiconstrictosus cephalonn. sp., andPartitiofilum yakschiniin. sp.

Carbonate rocks from the Riphean-Vendian transition of Anabar Uplift: Isotope (87Sr/86Sr, δ13C, δ18O) systematics and chemostratigraphic results

2018 ◽  
Vol 482 (4) ◽  
pp. 434-438
Author(s):  
I. Gorokhov ◽  
◽  
A. Kuznetsov ◽  
G. Konstantinova ◽  
G. Lipenkov ◽  
...  
Keyword(s):  
Carbonate Rocks ◽  
Anabar Uplift
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