The Pennsylvanian (Moscovian) Izvarino Section, Donets Basin, Ukraine: A Multidisciplinary Study on Microfacies, Biostratigraphy (Conodonts, Foraminifers, and Ostracodes), and Paleoecology

2007 ◽  
Vol 81 (S69) ◽  
pp. 1-85 ◽  
Author(s):  
Beate Fohrer ◽  
Tamara I. Nemyrovska ◽  
Elias Samankassou ◽  
Katsumi Ueno
Keyword(s):  
Donets Basin ◽  
Coal Seams ◽  
Marine Deposits ◽  
Systematic Paleontology ◽  
Multidisciplinary Study ◽  
Moscow Basin ◽  
Conodont Fauna ◽  
Total Fauna ◽  
Marine Nearshore ◽  
One New Species

The mid-Moscovian Izvarino section, Donets Basin, eastern Ukraine, exhibits a complete sedimentological record of siliciclastics (sandstones, siltstones, and calcareous shales) with limestone intercalations and, rarely, coal seams. A multidisciplinary study including microfacies analysis, systematic paleontology (conodonts, fusulinoideans, and ostracodes), biostratigraphy, and paleoecology was focused on the limestones, from limestone L4 through limestone M1, and the adjacent marine shales. Based on sedimentology and fossil associations, the cyclic sediments of the Izvarino section were interpreted as entirely marine deposits of open- and shallow-marine, nearshore and offshore environments with variable terrigenous input.The well-preserved ostracode faunas are dominated by representatives of the families Amphissitidae, Hollinellidae, Healdiidae, Cavellinidae, and Paraparchitidae. The total fauna is 18 species, of which four are new: Hollinella (Hollinella) granuloba Fohrer, n. sp., Hollinella (Praehollinella) kamenka Fohrer, n. sp., Jordanites krasnodonensis Fohrer, n. sp., and Asturiella donbassica Fohrer, n. sp. The conodont fauna includes 21 species belonging to nine genera and includes one new species: Idiognathodus izvaricus Nemyrovska, n. sp. The conodont faunas are dominated by idiognathodontids. Representatives of Diplognathodus and Neognathodus play a subordinate role. A total of 56 fusulinoidean species referable to 20 genera has been identified; one is new: Eostaffella brazhnikovae Ueno, n. sp.Conodont and fusulinoidean biostratigraphy led to surprising differences in the age assignment of the Izvarino section and its correlation with the nearby Moscow Basin, Russia. The interval studied is lower Kashirian (Tsninskaya) to middle Kashirian (Narskaya), according to conodonts. It extends to the base of the Podolskian, however, according to fusulinoideans. This discrepancy is possibly related to problems in correlation of the type sections in the Moscow Basin. It calls for reexamination of the mid-Moscovian boundary interval and shows the limits of interbasinal correlations based on a single fossil group.

Late Cretaceous–early Paleocene ostracod biostratigraphy of Scientific Drilling Sk1(N) in the Songliao Basin, northeast China

2014 ◽  
Vol 88 (4) ◽  
pp. 786-799 ◽  
Author(s):  
Haiying Qu ◽  
Dangpeng Xi ◽  
Sha Li ◽  
Jean Paul Colin ◽  
Qinghua Huang ◽  
...  
Keyword(s):  
New Species ◽  
Late Cretaceous ◽  
Northeast China ◽  
Songliao Basin ◽  
Scientific Drilling ◽  
Marine Deposits ◽  
First Occurrence ◽  
Early Paleocene ◽  
First Time ◽  
One New Species

Cretaceous non-marine deposits are widespread in China and have been studied comprehensively. The Songliao Basin in northeast China is thought to be well suited for investigation of Cretaceous biostratigraphy. However, despite much research having been conducted in the basin, little is known about its Late Cretaceous biostratigraphy and paleoenvironment. Here, we establish a high-resolution biostratigraphy of the Late Cretaceous based on ostracods from borehole SK1(n) in the Songliao Basin, northeast China. As part of the present study, 45 species assigned to 20 genera have been recovered, with one new species (Ilyocypris bisulcata n. sp.) and five ostracod assemblages: the Cypridea gunsulinensis–Mongolocypris magna assemblage, which is marked by the first occurrence (F.O.) of Ilyocyprimorpha with nodes and spines; the Ilyocyprimorpha–Limnocypridea sunliaonensis–Periacanthella assemblage, which ranges from the F.O. of Ilyocyprimorpha with nodes and spines to the F.O. of Strumosia sp.; the Strumosia inandita assemblage from the F.O. of Strumosia sp. to the lower occurrence (L.O.) of Strumosia inandita; the Talicypridea amoena–Metacypris kaitunensis–Ziziphocypris simakovi assemblage from the F.O. of Mongolocypris apiculata (Cea) and Talicypridea amoena to the F.O. of Ilyocypris sp.; and the Ilyocypris assemblage from the F.O. of Ilyocypris sp. to the L.O. of Ilyocypris bisulcata n. sp.Moreover, the zonal fossil Ilyocypris bisulcata n. sp. of Zone 5 is here described for the first time from the upper Mingshui Formation, and Paleocene charophyte genera including Neochara and Grovesicahra have been found to coexist with the Zone 5 fauna. The age of the Ilyocypris Assemblage is assigned to the latest Maastrichtian to the earliest Danian.

scholarly journals ON THE POSITION OF THE BOUNDARY BETWEEN THE MOSCOVIAN AND KASIMOVIAN GLOBAL STAGES OF THE CARBONIFEROUS IN THE DONETS BASIN

2021 ◽  
Vol 14 (1) ◽  
pp. 63-71
Author(s):  
Tamara I. Nemyrovska
Keyword(s):  
Lower Boundary ◽  
Donets Basin ◽  
Present Position ◽  
Precise Position ◽  
Index Species ◽  
Potential Index ◽  
Type Area ◽  
Extinction Event ◽  
Moscow Basin ◽  
Definition Of

Detailed new data on paleontology and stratigraphy were obtained in the process of fulfilling the tasks of the International Carboniferous Subcommission on definition of the scopes of the Moscovian and Kasimovian global stages and the precise position of the boundary between them. The analysis of these data has shown that the position of this boundary in the type  area and in the other regions needs the revision. Recently the investigation of the conodonts from the Moscovian–Kasimovian boundary deposits in the Donets Basin revealed that the boundary between the Moscovian and Kasimovian stages in the official Ukrainian Carboniferous Stratigraphic Scheme does not correspond to this boundary in the type area of these stages in the  Moscow Basin. To correct this situation the lower boundary of the Kasimovian in the Ukrainian Scheme must be downgraded by two conodont zones — Swadelina subexcelsa and Sw. makhlinae. To update this boundary in the type area to fulfill the task of the Carboniferous Subcommission four conodont species were proposed as potential index-species for the definition of the boundary between the Moscovian and Kasimovian global stages. These conodont species are as follows Sw. subexcelsa,  Idiognathodus sagittalis, I. turbatus and I. heckeli. One of these species, which is selected, will be used as a marker of the  studied boundary. None of these species is officially selected as a marker. If Sw. subexcelsa will be selected, the position of  the Moscovian–Kasimovian boundary will remain at the present position. In this case this boundary in the Donets Basin has to be downgraded by two conodont zones. If one of three Idiognathodus will be selected, this boundary in the type area will be   upgraded by one and a half regional substage. In the Donets Basin it will be upgraded by less than a cycle. Keywords: Carboniferous, stratigraphy, conodonts, extinction event, index-­species. 

Petrography and geochemistry of Carboniferous coal seams in the Donets Basin (Ukraine): implications for paleoecology

2003 ◽  
Vol 55 (2-4) ◽  
pp. 225-259 ◽  
Author(s):  
R.F Sachsenhofer ◽  
V.A Privalov ◽  
A Izart ◽  
M Elie ◽  
J Kortensky ◽  
...  
Keyword(s):  
Donets Basin ◽  
Coal Seams

Late Moscovian fusulinids from the “N” Formation (Donets Basin, Ukraine)

2013 ◽  
Vol 87 (1) ◽  
pp. 44-68 ◽  
Author(s):  
Rimma R. Khodjanyazova ◽  
Vladimir I. Davydov
Keyword(s):  
New Species ◽  
Sea Level ◽  
Donets Basin ◽  
Taxonomic Study ◽  
Evolutionary Trend ◽  
Type Area ◽  
Distributional Patterns ◽  
Moscow Basin ◽  
Three New Species

A fusulinoidean taxonomic study of the Gurkovo and Kalinovo sections allows us to refine the biostratigraphy of the poorly studied Myachkovian (upper Moscovian) strata of the “N” Formation in the Donets Basin. Three fusulinid biozones,Hemifusulina graciosa–Fusiella spatiosa,Fusulina cylindrica–Fusulinella pseudobocki, andFusulinella?kumpani, are proposed in the interval from the top of Limestone M10to the base of N3, and they are correlated with coeval strata in the historical type area of the Moscow Basin. A total of 33 fusulinid species and subspecies belonging to eight genera are described, including three new species:Hemifusulina gurkovensisn. sp.,Beedeina innaeformisn. sp., andFusulina sosninaen. sp. The main evolutionary trend in fusulinoidean morphology in the late Moscovian is the appearance of massive secondary deposits in the limestone of the “N” Formation.Specific temporal and distributional patterns of the Middle Pennsylvanian fusulinoidean assemblages indicate variations in sea level stand. Variations are cyclic, with periods ∼600,000–1,000,000 years. AHemifusulina-association indicates the beginning of transgression; the late transgression–high sea level stand is designated by theBeedeina–Neostaffella–Ozawainella–Taitzehoellaassemblage which is successively replaced by the most diverseFusulinella-dominant association, which occupied a progressively shallowing sea.The similarity of fusulinoidean assemblages in the Moscow and Donets Basins and their cognate evolution trends reveal a connection between both regions at least during Podolskian–Myachkovian time.

scholarly journals Rhaetic to Lower Liassic palynology of the onshore south-eastern North Sea Basin

1977 ◽  
Vol 109 ◽  
pp. 1-128
Author(s):  
Jens J Lund
Keyword(s):  
New Species ◽  
New Combinations ◽  
Nw Germany ◽  
Important Species ◽  
Marine Deposits ◽  
Southern Scandinavia ◽  
Composite Section ◽  
One New Species ◽  
Upper Boundary ◽  
Zones And Subzones

Rhaetic to Lower Liassic microfloras of gymnospermpollen, microspores and aquatic palynomorphs from outcrops and cored wells in southern Scandinavia and NW Germany are investigated. 146 groups of palynomorphs, mainly species are presented from the Danish borehole Rødby 1. Based mostly on restudy of the holotypes 24 new combinations for species/varieties occurring in Rødby 1 are proposed. One new species , Corollina zwolinskai ranging from Lower to Middle Rhaetic is described.The range of polynomorphs, mainly species are noted in the wells: Rødby 1, Maasbiüll 1 and Eitzendorf 8 and in a composite section from Scania. The following miospore zones are defined: The Corollina Enzonalasporites Zone (? Norian - Lower Rhaetic), the Ricciisporites Conbaculatisporites Zone (transition (Lower-) Middle Rhaetic), the Rhaetipollis Limbosporites Zone (Middle Rhaetic), the Riciisporites Polypodiisporites Zone (Upper Rhaetic), the Pinuspollenites Trachysporites Zone (Lias alfa 1-2) and an unnamed zone with Cerebropollenites macroverrucosus (Lias alfa 3 to beta to ?, upper boundary not defined). Within the Corollina Enzonalasporites Zone the following subzones are defined: The Corollina Porcellispora Subzone, the Granuloperculatipolis Subzone and above the Enzonalasporites Conbaculatisporites Subzone. The two latter subzones are probably restricted to the Lower Rhaetic. The zones and subzones are used to correlate the mainly non marine deposits of Rødby 1, Scania, Poland and E. Germany with the more marine deposits of NW Germanu.In Scania the stratum typicum of the stratigraphically important species Limbosporites Lundbladi Nilsson is shown to be (Middle) Rhaetic. Unmixed Lepidopteris and Thaumatopteris macrofloras are of (Middle) Rhaetic and Lias alfa age, respectively.In E Germany the topmost "Middle Keuper" sensu Schulz is transferred to the Lower Rhaetic.In Poland the Drawno Beds are shown to be Lower Rhaetic and the Weilichowo Beds to be Middle (to Upper) Rhaetic.Rødby 1 is correlated lithostratigraphically with wells in NW Germany mainly on basis of the clay colours (red and green in the Lower Rhaetic, dark grey in the Middle Rhaetic, brown to light greenish grey in the Upper Rhaetic and dark grey in the basal Liassic). The lithostratigraphy agrees closely with the palynostratigraphy in Rødby 1.

Petroleum potential and depositional environments of Middle Jurassic coals and non-marine deposits, Danish Central Graben, with special reference to the Søgne Basin

1998 ◽  
pp. 1-80 ◽  
Author(s):  
Henrik I. Petersen ◽  
Jan Andsbjerg ◽  
Jørgen A. Bojesen-Koefoed ◽  
Hans P. Nytoft ◽  
Per Rosenberg
Keyword(s):  
Organic Matter ◽  
Special Reference ◽  
Sea Level ◽  
Middle Jurassic ◽  
Depositional Environments ◽  
Thermal Maturity ◽  
Coal Seams ◽  
Petroleum Potential ◽  
Marine Deposits ◽  
Marine Influence

NOTE: This monograph was published in a former series of GEUS Bulletin. Please use the original series name when citing this monograph. For example: Petersen, H. I., Andsbjerg, J., Bojesen-Koefoed, J. A., Nytoft, H. P., & Rosenberg, P. (1998). Petroleum potential and depositional environments of Middle Jurassic coals and non-marine deposits, Danish Central Graben, with special reference to the Søgne Basin. Geology of Denmark Survey Bulletin, 36, 1-80. https://doi.org/10.34194/dgub.v36.5022 _______________ New data from five wells in the Søgne Basin, Danish Central Graben of the North Sea - West Lulu-1, West Lulu-3, Lulu-1, Amalie-1 and Cleo-1 - together with previously released data from the West Lulu-2 well, show that the cumulative thickness of the Bryne Formation coal seams decreases towards the palaeo-shoreline from 5.05 m to 0.60 m, and that the seams have varying extents. Their overall organic petrographic and geochemical composition reflects the palaeoenvironmental conditions in the precursor mires, in particular the rate of rise in the water table, principally related to the relative rise in sea level, and the degree of marine influence. Laterally towards the palaeo-shoreline, all coal seams have increased proportions of C27 steranes and higher C35-homohopane indices suggesting stronger marine influence on the coastal reaches of the ancient mires. In each well it is also observed that coal seams formed during accelerated relative sea-level rise (T-seams) are characterised by higher contents of sterane C27 and higher C35-homohopane indices than seams formed during slower rates of base-level rise (R-seams). The most landward and freshwater-influenced parts of the seams have higher proportions of sterane C29 and the highest Pr/Ph ratios. The coals, with respect to thermal maturity, are well within the oil window, except in the Amalie-1 well where they are more mature. The largest average hydrogen indices and thermally extracted and generated bitumen yields are obtained from the T-seams. However, generally an increase in the hydrogen index is recorded in a seaward direction for all seams. Multivariate regression analysis demonstrates that collotelinite, telinite, the vitrinite maceral group, vitrinite-rich microlithotypes and the TOC content have a significant positive influence on the remaining generative potential represented by S2. Pyrolysis-gas chromatography reveals that during maturation the coals will generate from 72.4 to 82.0% oil-like components and only 18.0 to 27.6% gas. However, this does not necessarily imply that all of these oil-like components can be expelled to form a crude oil accumulation. Distribution of C27–29 regular steranes shows good correlation between extracts of Bryne Formation coals and oils/condensates present in Bryne Formation sandstones. The sum of evidence indicates that the coals in the Søgne Basin have generated and are still capable of generating liquid and gaseous petroleum, but with respect to petroleum generation potential, they are not as good as the documented oil-prone Middle Jurassic coals from North-East Greenland and Tertiary coals from Asia. Mudstones intercalated with the Bryne Formation coals have a similar or lower generative potential as the coals. In areas outside the Søgne Basin, the coastal plain deposits of the Central Graben Group contain predominantly terrestrial-derived kerogen type III or IIb. The thermal maturity of the organic matter ranges from close to or within the peak oil generation range in the oil window (Alma-1x, Anne-3a and M-8 well) to the late oil window (Elly-3 and Falk-1 wells) or close to the end of the oil window (Skjold Flank-1 well). Only a limited generative potential remains in Elly-3, but the kerogen may initially have possessed a good petroleum potential. In the Falk-1 well, a good generative capacity still remains. The kerogen in Skjold Flank-1 may possess the capability to generate condensate and gas, whereas the organic matter in the Alma-1x, Anne-3a and M-8 wells generally exhibits a poor petroleum generative potential.  

Quantification of the control of sequences by tectonics and eustacy in the Dniepr-Donets Basin and on the Russian Platform during Carboniferous and Permian

2003 ◽  
Vol 174 (1) ◽  
pp. 93-100 ◽  
Author(s):  
Alain Izart ◽  
Yves Le Nindre ◽  
Randell Stephenson ◽  
Denis Vaslet ◽  
Sergei Stovba
Keyword(s):  
Driving Forces ◽  
Donets Basin ◽  
Late Devonian ◽  
East European ◽  
Tectonic Processes ◽  
Moscow Basin ◽  
History Of ◽  
Cooling Phase ◽  
Intracratonic Basin ◽  
Stratigraphic Sequences

Abstract A comparative quantitative analysis of late Paleozoic subsidence in the Moscow and Dniepr-Donets basins provides additional insight into the relative importance of tectonics and eustacy as sedimentation driving forces. Late Devonian rifting clearly displayed in the Dniepr-Donets Basin and underlying Precambrian East European Craton probably also affected the Moscow Basin. After this episode, however, the history of both basins diverged ; rifting processes ceased in the Moscow Basin but continued in the Dniepr-Donets Basin. The Moscow Basin is an intracratonic basin that can be modelled with a lithospheric heating phase from Devonian to Bashkirian times and a subsequent cooling phase generating thermal subsidence from Moscovian to Asselian times. The Dniepr-Donets Basin is a rift basin displaying an initial rifting phase during the late Devonian, an initial phase of post-rift evolution from the Tournaisian to the base of late Viséan, and a second rifting phase, seen mainly in the Donets and Donbas segments only, from late Viséan to Asselian times. Subsequent subsidences ended with uplift during the Sakmarian and were overprinted by compressional tectonics during Mesozoic and Cenozoic times. A comparison of local and global second-order stratigraphic sequences, allowing an estimation of the ratio of the importance of eustatic to tectonic processes controlling subsidence in each basin, demonstrates that eustacy controlled sedimentation in the Moscow Basin and tectonics prevailed in the Dniepr-Donets Basin.

Conodont fauna and biostratigraphy of the Outram, Skoki, and Owen Creek Formations (Lower to Middle Ordovician), Wilcox Pass, Alberta, Canada

2003 ◽  
Vol 77 (5) ◽  
pp. 958-976 ◽  
Author(s):  
Leanne J. Pyle ◽  
Christopher R. Barnes ◽  
Zailiang Ji
Keyword(s):  
New Species ◽  
National Park ◽  
New Genus ◽  
Carbonate Platform ◽  
Canadian Cordillera ◽  
Middle Ordovician ◽  
Conodont Fauna ◽  
One New Species ◽  
A New Species ◽  
Reference Section

A collection of 60,886 conodonts was recovered from 141 samples of the Outram, Skoki and Owen Creek Formations (Lower to Middle Ordovician) that outcrop through the Wilcox Pass section, Jasper National Park, Alberta, Canada. This section representσ the standard reference section for the Lower-Middle Ordovician of the Southern Canadian Cordillera. The well preserved fauna is assigned to 75 species representing 48 genera. The species are representative of both the Midcontinent and Atlantic faunal realms, but dominantly the former. Nine Midcontinent Realm zones are recognized in the upwards shallowing carbonate platform succession including the Scolopodus subrex, Acodus kechikaensis, Oepikodus communis, Jumudontus gananda, Tripodus laevis, Histiodella altifrons, Histiodella sinuosa, Histiodella holodentata, and Phragmodus “pre-flexuosus” zones. Zones recognized that are characteristic of the Atlantic Realm include Paroistodus proteus, Paracordylodus gracilis, Oepikodus evae, Paroistodus originalis, and Microzarkodina flabellum. A new genus, Filodontus, is proposed for elements assigned previously to the form genus “Scolopodus” filosus. A new species, Leptochirognathus wilcoxi, is described and one new species, left in open nomenclature, is assigned to Rossodus?.

scholarly journals Serpukhovian coral assemblages from Idmarrach and Tirhela Formations (Adarouch, Morocco)

2016 ◽  
Vol 19 (1-2) ◽  
pp. 29-42
Author(s):  
Sergio RODRÍGUEZ ◽  
Ismail SAID ◽  
Ian D. SOMERVILLE ◽  
Pedro CÓZAR ◽  
Ismael CORONADO
Keyword(s):  
Small Degree ◽  
Donets Basin ◽  
North African ◽  
Depositional Settings ◽  
Moscow Basin ◽  
Degree Of Isolation ◽  
Total Diversity ◽  
Stratigraphic Range

The Serpukhovian coral assemblages from Idmarrach and Tirhela formations (Adarouch, Morocco) have been studied. They yielded quite diverse assemblages with a total of 32 rugose and 1 tabulate species. The distribution of corals in the sections Idmarrach 1, 2, 3, and 4 and Tirhela 1 and 2 has been established, which include Serpukhovian and Bashkirian rocks. The Serpukhovian assemblages are composed mostly of species that have their higher abundance in the upper Viséan. However, most of the recorded taxa in Adarouch have been already mentioned in Serpukhovian rocks from Britain, Moscow Basin, Urals, Donets Basin and other North African regions such as Tindouf and Béchar. Thus, their stratigraphic range is not expanded. The coral diversity is mainly concentrated in biostromes from the Idmarrach 1 section. However, the high total diversity is due to the combination of favourable depositional settings and a mixture in different beds of several ecological environments, such as coral shoals, protected lagoons and microbial mounds. Most Serpukhovian species have been recorded in areas from the western Palaeotethys previously mentioned. The total assemblage can be considered as typical for the late Mississippian in the western Palaeotethys. However, a small degree of isolation is registered by the absence in the Serpukhovian from Adarouch of the genera Lonsdaleia, Actinocyathus, Tizraia and Kizilia that have been recorded in other North African basins. That fact may be explained by the incipient rising of some areas as ‘highs’ due to the start of the collision between Gondwana and Laurasia.

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