Rb-Sr systematics of Middle Riphean Shales, The Yusmastakh Formation, Anabar Massif, Siberia

Goromov, I. M.; Семихатов, М. А.; Turchenko, T. L.; Melnikov, Nikita; Константинова, Г. В.; Kutyavin, E. P.; Самсонова, Е. Н.

doi:10.1007/bf02891438

Cited by 2 publications

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“…Sergeev et al, 1995. However, considering all biostratigraphic data on stromatolitic and microfossil assemblages, as well as new chemostratigraphic and isotopic-geochronological data, age of the Billyakh Group can be considered between 1500 and 1200 Ma (Bartley et al, 2001;Gorokhov et al, 1991Gorokhov et al, , 1995Gorokhov et al, , 2001. The microfossils are known mainly from the Upper Member of the Kotuikan and the Lower Member of the Yusmastakh formations where they are three dimensionally preserved in early diagenetic cherts.…”

Section: Siberiamentioning

confidence: 99%

“…The Solooliiskaya and Billyakh groups belong to the same basin and their intrabasinal correlation is beyond doubt. Considering the new data on the Anabar Uplift, the age of the Solooliiskaya Group should be bracketed between 1500 and 1250 Ma as well (Gorokhov et al, 1991(Gorokhov et al, , 1995(Gorokhov et al, , 2001.…”

Section: The Debengda Formation Olenek Uplift Siberiamentioning

confidence: 99%

“…However, the lithological data on the Svetlyi carbonates are insufficient to prove any reliable interpretation of its depositional environments. Data on the microfossils northern Siberia Lower Mesoproterozoic (Lower Riphean) 1500-1250 Gorokhov et al, 1991Gorokhov et al, , 1995Gorokhov et al, , 2001 The Debengda Formation…”

Section: The Svetlyi Formation Uchur-maya Region Siberiamentioning

confidence: 99%

“…The Olenek Uplift, northern Siberia Lower Mesoproterozoic (Lower Riphean) 1500-1250 Gorokhov et al, 1991Gorokhov et al, , 1995Gorokhov et al, , 2001 The Chichkan Formation…”

Section: The Svetlyi Formation Uchur-maya Region Siberiamentioning

confidence: 99%

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Mesoproterozoic silicified microbiotas of Russia and India's Characteristics and Contrasts

Сергеев

Шарма²,

Shukla³

2008

JPS

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The paper analyses eight silicified Mesoproterozoic microbiotas of peritidal and shallow subtidal settings from Siberia, Ural and India. These microbiotas, subdivided into three main types - Kotuikan, Satka and Kataskin-are characterized by different taxonomic composition of microfossils. Mat-building entophysalidacean algae Eoentophysalis, ellipsoidal akinetes of nostocalean cyanobacteria genus Archaeoellipsoides and spherical large planktic microfossils Myxococcoides grandis of uncertain affinities dominate the Kotuikan-type microbiotas, the short trichomes are a rare but a distinctive element of these assemblages. The Satka type microbiotas are dominated by mat-building hormogonian cyanobacteria of genus Siphonophycus and chroococcacean dwellers genera Gloeodiniopsis, Eosynechococcus, Sphaerophycus, whereas entophysalidacean cyanobacteria are conspicuously missing and akinetes of genus Archaeoellipsoides occur but never abundant. Besides, microbiotas of Satka type include morphologically simple remains of phytoplanktic eukaryotic microorganisms-sphaeromorphic acritarchs genera Satka, Pterospermopsimorpha, Granomarginata? and Leiosphaeridia. The late Mesoproterozoic Kataskin-type microbiotas contain mat-forming entophysalidacean, oscillatoriacean and nostocalean as well as mat-dwelling and planktic chroococcacean cyanobacteria, but the most typical feature of these microfossil assemblages is the presence of a stalked cyanobacterium, Polybessurus bipartitus. Almost all-available data on relevant silicified Mesoproterozoic microbiotas from China, Greenland and North America have been analysed. Further different types of Mesoproterozoic silicified microbiotas have been compared with Palaeo- and Neoproterozoic microbiotas in cherts as well as with the assemblages of organic-walled microfossils throughout the world and explained differences and similarities in their composition. The analysis indicate that the Mesoproterozoic microbiotas have their own specific taxonomic composition and differ from the Palaeo- and Neoproterozoic microfossils occurring in the same and different palaeoenvironmental setting. The presence of newly evolved type of cyanobacteria, red algae and acanthomorphic acritarchs in the Kataskin-type microbiotas and contemporaneous open-shelf facies suggest that the terminal Mesoproterozoic can be separated as an independent biostratigraphical unit.

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Section: Siberiamentioning

confidence: 99%

Section: The Debengda Formation Olenek Uplift Siberiamentioning

confidence: 99%

Section: The Svetlyi Formation Uchur-maya Region Siberiamentioning

confidence: 99%

“…The Olenek Uplift, northern Siberia Lower Mesoproterozoic (Lower Riphean) 1500-1250 Gorokhov et al, 1991Gorokhov et al, , 1995Gorokhov et al, , 2001 The Chichkan Formation…”

Section: The Svetlyi Formation Uchur-maya Region Siberiamentioning

confidence: 99%

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Mesoproterozoic silicified microbiotas of Russia and India's Characteristics and Contrasts

Сергеев

Шарма²,

Shukla³

2008

JPS

View full text Add to dashboard Cite

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“…The composition of deposits and their stratigraphy were studied during the geolog ical mapping in the 1960s-1970s (Gosudarstven naya…, 1983, as well as during subsequent sedimen tological (Petrov, 2011), paleontological (Sergeev, 1993;Sergeev et al, 2007), and isotope geochrono logical (mainly, K Ar and Rb Sr) studies (Gorokhov et al, 1991(Gorokhov et al, , 2001. At the same time, there is a lack of information on the provenance areas and evolution of the Riphean sedimentary basins on the western and eastern slopes of the Anabar uplift.…”

Section: Introductionmentioning

confidence: 99%

Results of the U-Pb age of detrital zircons from Upper Proterozoic deposits of the eastern slope of the Anabar uplift

Kuptsova

Khudoley

Davis

et al. 2015

Stratigr. Geol. Correl.

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The Upper Proterozoic sequence in the southern part of the East Anabar Basin, as throughout the entire framing of the Anabar uplift, has a two unit terrigenous carbonate structure. The results of the U Pb da ting of detrital zircons show that there is a difference in stratigraphy of Riphean strata in the north and south of the Anabar Uplift. In the north, deposits of the entire sequence are regarded as Early Riphean; in the south, the thickness of these deposits is reduced to 70 m. The overlying stratum is regarded as Upper Riphean-Vendian. As the strata in the southern part of the East Anabar Basin strata are of younger (Late Riphean-Vendian) age, they cannot be assigned to the Mukun and Billyakh groups. The Riphean-Vendian deposits accumulated mainly through erosion of crystalline rocks of the Anabar Uplift. In the upper part of the sequence, the Vendian magmatic complexes located probably within the Taimyr Orogen played a significant role as provenance areas.

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Rb-Sr systematics of Middle Riphean Shales, The Yusmastakh Formation, Anabar Massif, Siberia

Cited by 2 publications

References 0 publications

Mesoproterozoic silicified microbiotas of Russia and India's Characteristics and Contrasts

Mesoproterozoic silicified microbiotas of Russia and India's Characteristics and Contrasts

Results of the U-Pb age of detrital zircons from Upper Proterozoic deposits of the eastern slope of the Anabar uplift

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