The Regional Stratigraphic Chart of the Ordovician of the Siberian Platform (New Version)

Каныгин, А. В.; Yadrenkina, A. G.; Тимохин, А. В.; Moskalenko, T. A.; Gonta, T. V.; Stepanova, N. I.; Sychev, Oleg V.; Маслова, О. А.

doi:10.20403/2078-0575-2016-5s-4-57

Cited by 7 publications

(9 citation statements)

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“…Isotelus is reported from Siberia (Maksimova 1962), where species occur with monorakines (see also Kanygin et al 2017). Two species of Isotelus from the Late Ordovician of Kazakhstan were described by Weber (1948) and Chugaeva (1958), but Isotelus romanovskyi Weber, 1948was transferred to Damiraspis Ghobadi Pour & Popov in Ghobadi Pour et al, 2009by Ghobadi Pour et al (2011b and I. levis Chugaeva, 1958 was transferred to Basilicus (Basiliella) Kobayashi, 1934by Zhou & Zhou (2006.…”

Section: Derivation Of Namementioning

confidence: 98%

“…Other material mentioned is stored in the Natural History Museum, London, UK (NHMUK). Global stages and subdivisions follow Bergstr€ om et al (2009) while the Siberian stages and correlations are based on Sennikov et al (2015) and Kanygin et al (2017). Although the units applied here may represent 'horizons' in Russian terminology ($stages in non-Russian terminology), they are treated as stratigraphical formations (see discussion in Ebbestad & Fortey 2019).…”

Section: Geological Setting and Materialsmentioning

confidence: 99%

“…Balashova (1960) (Balashova 1959(Balashova , 1960 figure captions). The species is not listed in the stratigraphical summaries of Ordovician faunas on the Siberian Platform by Kanygin et al (1988Kanygin et al ( , 2017, nor is the Povorotnaya Formation recognized as a unit there. Holloway (2004) figured the holotype cranidium and one paratype pygidium but incorrectly referred these to the Taimyr locality and cited their position as either the Tolmacheva or the Povorotnaya formations.…”

Section: Evenkaspis (Evenkaspis) Norilskiensismentioning

confidence: 99%

“…At that time Balashova correctly recognized many similarities with contemporaneous faunas in North America and northern Europe, but also noted similarities to trilobites endemic to the Siberian platform. Several geological expeditions and collecting trips have since been made to Taimyr and various fossil groups have been studied, including brachiopods, corals, bryozoans and graptolites (Kanygin et al 2017;Sobolevskaya & Nekhorosheva 2017). It is clear that the Middle and Late Ordovician assemblages comprise widespread taxa as well as Siberian endemics (Melnikova 2003;Modzalevskaya 2003;Tolmacheva 2003;Khromych 2010), and the Ordovician faunas of Taimyr have been included in a 'Kolymo-Siberian paleobiogeographic province' (Kanygin et al 2010 and references therein).…”

Section: Introductionmentioning

confidence: 99%

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Late Ordovician trilobites from the Taimyr Peninsula, Arctic Russia

Ebbestad

Fortey

2019

Journal of Systematic Palaeontology

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Ordovician trilobites from the important sequences of the Taimyr Peninsula, Arctic Russia have been poorly studied since the work by Balashova (1959, 1960). Newly collected and well-preserved specimens from Late Ordovician sections, along with the original collections of Balashova, form the basis of a reappraisal of 56 Upper Ordovician (Sandbian-Katian) trilobites. New species include Bronteopsis tenuirhachis, Dionide trigintasegmentata, Failleana superba, Pararemopleurides ornatissimus, Raymondella plastron, Robergia subtilis and R. nikolaiseni. Probable new species include: Stenopareia sp. aff. S. glaber, and Stygina sp. aff. S. latifrons. A new subgenus Bilobaspis of the monorakine genus Evenkaspis, and a new species, Evenkaspis (Bilobaspis) mirabilis, are proposed. Thoracic segments and pygidium are correctly associated for the first time with cephala of the hitherto poorly understood Taimyraspis. The genera Effnaspis and Yumenaspis are likely junior synonyms of Taimyraspis. A placement within the Ityophoridae is suggested for Taimyraspis, together with the closely related genera Ityophorus and Frognaspis. Comparison of Goldillaenoides taimyricus with Failleana suggests that these are also closely related. A provisional placement of the former in the Styginidae is adopted. Bronteopsis nannus Balashova could be a juvenile B. tenuirhachis, and is regarded as a nomen dubium. The genus Ceratevenkaspis dominates among the monorakines on Taimyr, while Monorakos itself has not been collected. Robergia nikolaiseni has a narrow cranidial border, which is also present in the type species of Robergia. Two biofacies are identified in the current collections. The first, the raphiophorid association, is widespread around low latitude Ordovician palaeocontinents, identifying marginal shelf sites; the association is not critical in defining palaeocontinents themselves. Inner shelf faunas of the monorakine-cheirurid-illaenid association have taxa that comprise a distinctive group with a strong link between Taimyr and the Ordovician Siberian craton. The trilobites described herein support reconstructions showing Taimyr peripheral to the Siberian craton during the Ordovician.

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Section: Derivation Of Namementioning

confidence: 98%

Section: Geological Setting and Materialsmentioning

confidence: 99%

Section: Evenkaspis (Evenkaspis) Norilskiensismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Late Ordovician trilobites from the Taimyr Peninsula, Arctic Russia

Ebbestad

Fortey

2019

Journal of Systematic Palaeontology

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“…The strata are mainly composed of alternating bioclastic thick-or thin-bedded, predominantly gray or greenish gray clayey limestones and mudstones with interlayers of siltstones and sandstones. The stratigraphy of these deposits has been studied in detail (Kanygin et al, 2007(Kanygin et al, , 2017Tesakov et al, 2003). However, the regional stratigraphic units and their boundaries well recognized and correlated within the Siberian Platform are difficult to compare with the General (Postanovleniya…, 2012) and International (Goldman et al, 2020) Stratigraphic Scales (hereafter GSS and ISS, respectively).…”

Section: Stratigraphymentioning

confidence: 99%

Acritarch Elektoriskos? williereae (G. & M. Deflandre, 1965) Vanguestaine, 1979 emend. nov. from the Upper Ordovician of the Siberian Platform: New Morphological and Stratigraphic Data

Raevskaya

Dronov

2021

Stratigr. Geol. Correl.

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The morphology of acritarch species Elektoriskos? williereae (G. & M. Deflandre, 1965) Vanguestaine, 1979, previously considered as a Silurian index of the Llandovery, has been clarified, the diagnosis emended, and the stratigraphic distribution expanded. According to new data, the first appearance of E.? williereae was confined to the upper part of the Baksan Horizon near the boundary of the Sandbian and Katian stages of the Upper Ordovician. Co-occurrence of E.? williereae with representatives of the genera Gordonirundum, Nirundella, Peteinosphaeridium, and Sacculidium is a distinct, well-recognizable palynological characteristic of the Katian deposits of the Siberian Platform which can serve for identification, dating, and correlation of the acritarch-bearing strata. Morphological variations in E.? williereae are a stable diagnostic feature of the species that distinguishes it from other taxa. It is possible that the species was sensitive to paleoenvironments and, probably, highly adaptive, which allowed it, remaining almost unchanged, to overcome the global Late Ordovician cooling, which became fatal for many other groups of organisms.

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Geochemistry of Oils and Gases From the Verkhnechonskoye Field, East Siberian Basin: Application of Analytical Results to Reservoir Characterisation

Oblasov,

Goncharov,

Eftor

et al. 2024

Journal of Petroleum Geology

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A geochemical study was carried out on oil and gas samples from the Verkhnechonskoye field, located on the Nepa‐Botuoba Anteclise in the central‐southern part of the Siberian Platform. The goal of the study was to distinguish between fluids derived from the V10‐13 and B12 reservoir units in the Vendian (Neoproterozoic) Katanga and Nepa Formations and to identify the producing reservoir using geochemical data. The results of analyses of 12 oil and 13 associated gas samples from the two reservoirs showed that all the fluids have similar geochemical properties including: low Pr/Ph ratios (0.78‐1.00); a predominance of C29 over C27 and C28 steranes; a predominance of odd‐numbered C21‐C25 n‐alkylbenzenes over their even‐numbered homologues; the presence of 12‐ and 13‐methylalkanes; and a high relative abundance of tricyclic terpanes (cheilantanes). All these properties are consistent with those of the properties of petroleum from other fields on the Siberian Platform. The molecular and stable carbon isotope compositions of the oils and gases suggest that they were derived from marine organic matter with a high algal input deposited under reducing conditions. To date, specific source rocks which generated the oil and gas present at fields on the Nepa‐Botuaoba Anteclise have not conclusively been identified, but potential candidates include the Upper Riphean Iremeken and Ayan Formations and more probably the Vendian Zherbinskaya, Seralakh, Vanavara and Nepa Formations.The second part of the study demonstrates the application to reservoir geochemistry of C3‐ and C4‐ alkylbenzene compounds together with more conventional biomarkers. Key parameters were selected using statistical processing and displayed in graphic profiles. These profiles allowed the oil and gas samples to be classified according to the reservoir from which they were derived based on their geochemical properties. Parameters based on C3‐ and C4‐ alkylbenzene compounds were most effective in discriminating between oils from the two reservoirs. In addition, a new parameter is proposed based on the contents of 1‐methyl‐3‐isopropylbenzene, 1‐methyl‐2‐isopropylbenzene and 1‐methyl‐2‐propylbenzene; this parameter correlates closely with the pristane/phytane ratio and can be used as an additional indicator of the level of oxicity in the source rock depositional environment.

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The Regional Stratigraphic Chart of the Ordovician of the Siberian Platform (New Version)

Cited by 7 publications

References 4 publications

Late Ordovician trilobites from the Taimyr Peninsula, Arctic Russia

Late Ordovician trilobites from the Taimyr Peninsula, Arctic Russia

Acritarch Elektoriskos? williereae (G. & M. Deflandre, 1965) Vanguestaine, 1979 emend. nov. from the Upper Ordovician of the Siberian Platform: New Morphological and Stratigraphic Data

Geochemistry of Oils and Gases From the Verkhnechonskoye Field, East Siberian Basin: Application of Analytical Results to Reservoir Characterisation

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