Gruzdev D.A.

dagruzdev@geo.komisc.ru

Graduated from Syktyvkar State University (2002), specialization "geology".
Junior researcher of Institute of Geology, Komi Science Center, Ural Branch of the Russian Academy of Sciences.
Area of scientific interests: sedimentology, stratigraphy.
Author of 22 publications.

Stratigraphy and lithology

Article # 11_2024	submitted on 04/02/2024 displayed on website on 05/06/2024
9 p.	Zhuravlev A.V., Gruzdev D.A.
pdf	Automated diagnostics of carbonate rocks from microphotographs of thin sections based on machine learning
	On the basis of machine learning technology, a computer model for diagnosing carbonate rocks from thin section images has been developed. The model uses the Dunham' classification and identifies four types of carbonates - mudstone, wackestone, packstone, grainstone, with 98% accuracy. The ability to use the model and software based on it is currently limited to the given carbonate classes. Any images outside of these classes will be misdiagnosed. The pros of the model include its high speed of operation and reproducibility of results. It can be used as a human assistant when working with large volumes of material. Keywords: carbonates, thin sections, machine learning, image classification.
article citation	Zhuravlev A.V., Gruzdev D.A. Avtomatizirovannaya diagnostika karbonatnykh porod po mikrofotografiyam shlifov na osnove mashinnogo obucheniya [Automated diagnostics of carbonate rocks from microphotographs of thin sections based on machine learning]. Neftegazovaya Geologiya. Teoriya I Praktika, 2024, vol. 19, no. 2, available at: https://www.ngtp.ru/rub/2024/11_2024.html EDN: YUQJXC

References

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   Li D., Zhao J., Ma J. Experimental studies on rock thin-section image classification by deep learning-based approaches // Mathematics. - 2022. - № 10. - 2317. DOI: 10.3390/math10132317
   Lokier S.W., Al Junaibi M. The petrographic description of carbonate facies: are we all speaking the same language? // Sedimentology. - 2016. - Vol. 63. - P. 1843-1885. DOI: 10.1111/sed.12293
   Ma H., Han G.Q., Peng L., Zhu L.Y., Shu J. Rock thin sections identification based on improved squeeze-and-excitation networks model // Computers & Geosciences. - 2021. - Vol. 152. - 104780. DOI: 10.1016/j.cageo.2021.104780
   Marmo R., Amodio S., Tagliaferri R., Ferreri V., Longo G. Textural identification of carbonate rocks by image processing and neural network: methodology proposal and examples // Computers & Geosciences. - 2005. - Vol. 31. - Issue 5. - P. 649-659. DOI: 10.1016/j.cageo.2004.11.016
   Su C., Xu S.J., Zhu K.Y., Zhang X.C. Rock classification in petrographic thin section images based on concatenated convolutional neural networks // Earth Sci. Inform. - 2020. - Vol. 13. - P. 1477-1484. DOI: 10.1007/s12145-020-00505-1
   Suzuki K. Vision Detector. - 2022. - https://apps.apple.com/us/app/vision-detector/id6443729650
   Tetard M., Carlsson V., Meunier M., Danelian T. Merging databases for CNN image recognition, increasing bias or improving results? // Marine Micropaleontology. - 2023. - Vol. 185. - 102296. DOI: 10.1016/j.marmicro.2023.102296
   Wang H., Cao W., Zhou Y., Yu P., Yang W. Multitarget intelligent recognition of petrographic thin section images based on faster RCNN // Minerals. - 2023. - Vol. 13. - 872. DOI: 10.3390/min13070872
   Wardaya P.D., Khairy H., Chow W.S. Extracting physical properties from thin section: another neural network contribution in rock physics // Paper presented at the International Petroleum Technology Conference, Beijing, China. - 2013a. DOI: 10.2523/IPTC-16977-MS
   Wardaya P.D., Khairy H., Chow W.S. Integrating digital image processing and artificial neural network for estimating porosity from thin section // Paper presented at the International Petroleum Technology Conference, Beijing, China. - 2013b. DOI: 10.2523/IPTC-16959-MS
   Wu B.K., Ji X.H., He M.Y., Yang M., Zhang Z.C., Chen Y., Wang Y.Z., Zheng X.Q. Mineral identification based on multi-label mage classification // Minerals. - 2022. - Vol. 12. - 1338. DOI: 10.3390/min12111338

Stratigraphy and lithology

Article # 24_2023	submitted on 06/02/2023 displayed on website on 06/30/2023
20 p.	Vevel Ya.A., Ivanova R.M., Gruzdev D.A., Zhuravlev A.V.
pdf	Calcareous algae of the Visean-Serpukhovian boundary beds in the Izyayu River section (south of the Chernyshev Uplift)
	We consider changes in the composition of the algaflora in the Visean-Serpukhovian boundary interval in the Izyayu River section. A transgressive trend in changing sedimentation conditions - from extremely shallow water at the end of the Visean to moderately deep water at the end of the Early and early Late Serpukhovian - is observed for the section as a whole. This change in sedimentation conditions led to a consistent reduction in the abundance and diversity of calcareous algae. In general, the composition of the Late Visean-Early Serpukhovian algaflora in the Izyayu River section corresponds to warm shallow-water conditions. Keywords: calcareous algae, changing sedimentation conditions, Lower Carboniferous, Chernyshev Uplift.
article citation	Vevel Ya.A., Ivanova R.M., Gruzdev D.A., Zhuravlev A.V. Vodorosli pogranichnykh otlozheniy vizeyskogo i serpukhovskogo yarusov v razreze na r. Iz"yayu (yug podnyatiya Chernysheva) [Calcareous algae of the Visean-Serpukhovian boundary beds in the Izyayu River section (south of the Chernyshev Uplift)]. Neftegazovaya Geologiya. Teoriya I Praktika, 2023, vol. 18, no. 2, available at: http://www.ngtp.ru/rub/2023/24_2023.html EDN: ZSZTYM

References

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   Gruzdev D.A. Pozdnedevonsko-rannekamennougol'naya izolirovannaya karbonatnaya platforma na Pripolyarnom Urale (r. Bol. Nadota) [Late Devonian-Early Carboniferous isolated platform in the Circumpolar Urals (Bolshaya Nadota River)]. Vestnik Instituta geologii, 2017, no. 4, pp. 16-23.
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   Kossovaya O.L., Vevel Y.A., Zhuravlev A.V. Fauna and sedimentation near the Visean/Serpukhovian boundary (Izyayu River section, Tchernyshev Swell, Subpolar Urals). Newsletter on Carboniferous Stratigraphy, 2001, no. 19, p. 29-31.
   Otmas N.M., Zhuravlev A.V. Litologo-fatsial'nye osobennosti nizhneserpukhovskikh otlozheniy (nizhniy karbon) yuga podnyatiya Chernysheva i Kos'yu-Rogovskoy vpadiny [Lithofacial features of the Lower Serpukhovian strata (Lower Carboniferous) from the south of Chernyshev Uplift and Kosyu-Rogov depression]. Neftegazovaya Geologiya. Teoriya I Praktika, 2016, vol. 11, no. 3, available at: http://www.ngtp.ru/rub/2/27_2016.pdf DOI: 10.17353/2070-5379/27_2016
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   Vevel' Ya.A. Foraminifery pogranichnykh vizeysko-serpukhovskikh otlozheniy v razreze na r. Iz"yayu (gryada Chernysheva) [Foraminifers of the Visean-Serpukhovian boundary level in the Izyayu River section (Chernyshev Ridge)]. Geologiya i mineral'nye resursy Evropeyskogo severo-vostoka Rossii: materialy XIV geol. s"ezda Respubliki Komi. Syktyvkar, 2004, vol. III, pp. 308-310.
   Vevel' Ya.A., Zhuravlev A.V., Gruzdev D.A. Nizhniy serpukhov (nizhniy karbon) v basseyne r. Kozhim (Pripolyarnyy Ural)[Lower Serpukhovian (Lower Carboniferous) of the Kozhim River basin (Subpolar Urals)]. Neftegazovaya Geologiya. Teoriya I Praktika, 2018, vol. 13, no. 4, available at: http://www.ngtp.ru/rub/2018/35_2018.html DOI: 10.17353/2070-5379/35_2018
   Zhuravlev A.V. Konodonty verkhnego devona - nizhnego karbona severo-vostoka Evropeyskoy Rossii Rossii [Conodonts of the Upper Devonian-Lower Carboniferous of the north east of European Russia]. St. Petersburg, VSEGEI, 2003, 85 p.
   Zhuravlev A.V. Mestnaya stratigraficheskaya skhema verkhnego devona - nizhnego karbona yugo-zapada Lyzhsko-Kyrtael'skogo vala (vostok Pechorskoy plity) [Stratigraphy of the Upper Devonian - Lower Carboniferous of south-west of Lyzha-Kyrtael swell (Pechora Plate eastward)]. Neftegazovaya Geologiya. Teoriya I Praktika, 2023, vol. 18, no. 1, available at: http://www.ngtp.ru/rub/2023/8_2023.html DOI: 10.17353/2070-5379/8_2023
   Zhuravlev A.V., Sobolev D.B. Konodonty pogranichnykh vizeysko-serpukhovskikh otlozheniy yuzhnoy chasti gryady Chernysheva (r. Iz"yayu) [Conodonts of the Visean-Serpukhovian boundary level of the southern part of the Сhernyshev Ridge (Iz'yayu River)]. Syktyvkarskiy paleontologicheskiy sbornik, 2000, no. 4, pp. 84-89.
   Zhuravlev A.V., Vevel Y.A., Gruzdev D.A., Erofeevsky A.V. Late Mississippian (early Serpukhovian) carbon isotope record of northern Laurussia: A proposal for the Visean / Serpukhovian boundary. Revista Mexicana de Ciencias Geológicas, 2023, vol. 40, no. 1, pp. 35-43. DOI: 10.22201/cgeo.20072902e.2023.1.1722

Stratigraphy and lithology

Section editor – PhD in geology and mineralogy Kirichkova A.I.

Article # 17_2020	submitted on 04/16/2020 displayed on website on 05/26/2020
16 p.	Zhuravlev A.V., Plotitsyn A.N., Gruzdev D.A.
pdf	Ydzhid Anticline Late Famennian (south of Pechora-Kozhva Uplift, Pechora Plate)
	Study of a number of sections in the south-western part of the Lyzha-Kyrtayol Swell (south of the Pechora-Kozhva Uplift) allow elaborating conodont-based biostratigraphy scale and improving lithological description of the lower part of the Nyumylga level. This stratigraphic interval corresponds to the upper unit of the Kamenka Formation represented by shallow-water bitumen bearing carbonates. The study allows improving information on geology of Ydzhid Anticline and local stratigraphic chart of the Upper Devonian. Keywords: Upper Devonian, biostratigraphy, Nyumylga level, Kamenka Formation, Ydzhid Anticline, Pechora Plate.
article citation	Zhuravlev A.V., Plotitsyn A.N., Gruzdev D.A. Pozdnefamenskie otlozheniya Ydzhidskoy antiklinali (yug Pechoro-Kozhvinskogo podnyatiya, Pechorskaya plita) [Ydzhid Anticline Late Famennian (south of Pechora-Kozhva Uplift, Pechora Plate)]. Neftegazovaya Geologiya. Teoriya I Praktika, 2020, vol. 15, no. 2, available at: http://www.ngtp.ru/rub/2020/17_2020.html
DOI	https://doi.org/10.17353/2070-5379/17_2020

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   Durkina A.V. Foraminifery nizhnekamennourol'nykh otlozheniy Timano-Pechorskoy provintsii [Foraminifers of the Lower Carboniferous of Timan-Pechora Province]. Mikrofauna SSSR, 1959, issue 10, pp. 132-389.
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   Vevel' Ya.A., Zhuravlev A.V., Popov V.V. Pogranichnye otlozheniya devonskoy i kamennougol'noy sistem v razreze na r. Kamenka (Pechoro-Kozhvinskiy megaval, Timano-Pechorskaya provintsiya) [Deposits of the Devonian and Carboniferous boundary in the Kamenka River section [Pechora-Kozhvinsky megaswell, Timan-Pechora province)]. Neftegazovaya Geologiya. Teoriya I Praktika, 2012, vol. 7, no. 1, available at: http://www.ngtp.ru/rub/2/6_2012.pdf
   Zhuravlev A.V., Plotitsyn A.N., Vevel' Ya.A., Erofeevskiy A.V. Pogranichnye otlozheniya devona i karbona na Vorkutinskom poperechnom podnyatii (r. Bol'shaya Usa) [Devonian–Carboniferous boundary beds in the Vorkuta Transverse Uplift (Bolshaya Usa River)]. Uchen. zap. Kazan. un-ta. Ser. Estestv. nauki, 2018, vol. 160, book 3, pp. 467–483.
   Zhuravlev A.V., Sobolev D.B. Devonian-Carboniferous boundary in the North of the Urals (Kamenka River and Vangyr River sections). Vestnik IG Komi SC UB RAS, 2019, no.9, pp.16-22. DOI: https://doi.org/10.19110/2221-1381-2019-10-16-22

Stratigraphy and lithology

Section editor – PhD in geology and mineralogy Kirichkova A.I.

Article # 32_2019	submitted on 07/24/2019 displayed on website on 09/05/2019
24 p.	Gruzdev D.A., Kotik I.S., Vevel Ya.A., Zhuravlev A.V., Kotik O.S.
pdf	Lithofacial characteristics and organic matter geochemistry of the Devonian-Carboniferous section оf folded and thrust belt area of the Kosyu-Rogov Depression southeastern part (using Levogrubeyu-1 well data as reference source)
	The results of study of the Middle-Upper Palaeozoic bioherm-shoal association in the east of the Timan-Pechora petroleum Basin (based on the Levogrubeyu-1 well description) are presented. The core lithological study allows distinguishing the facial analogues with the succession types of the Bolshaya Nadota carbonate association. It is supposed that the bioherm-shoal association demonstrates similar architecture along the all shelf border. Foraminifera and Conodont studies allow as to improve the biostratigraphic subdivision of the succession discovered by the borehole. The geochemical investigations reveal that the Devonian-Carboniferous rocks in the core samples disclose low hydrocarbon generation potential. On the other hand high hydrocarbon potential is supposed for the clayey-carbonate units of Middle-Late Frasnian age. Rock-Eval pyrolysis and the Conodont Alteration Index indicate a high level maturity of organic matter corresponding to the main gas generation zone (Ro > 1.5 %). Keywords: lithofacial study, organic matter, hydrocarbons, Upper Palaeozoic, Kosyu-Rogov Depression, Timan-Pechora petroleum basin.
article citation	Gruzdev D.A., Kotik I.S., Vevel Ya.A., Zhuravlev A.V., Kotik O.S., Priymak P.I. Litologo-fatsial'naya kharakteristika i geokhimiya organicheskogo veshchestva devonsko-kamennougol'nykh otlozheniy skladchato-nadvigovoy zony yugo-vostoka Kos'yu-Rogovskoy vpadiny (po dannym skvazhiny Levogrubeyuskaya-1) [Lithofacial characteristics and organic matter geochemistry of the Devonian-Carboniferous section оf folded and thrust belt area of the Kosyu-Rogov Depression southeastern part (using Levogrubeyu-1 well data as reference source)]. Neftegazovaya Geologiya. Teoriya I Praktika, 2019, vol. 14, no. 3, available at: http://www.ngtp.ru/rub/2019/32_2019.html
DOI	https://doi.org/10.17353/2070-5379/32_2019

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   Zhuravlev A.V. Otsenka stepeni termal'nogo katageneza paleozoyskikh otlozheniy severa Pay-Khoyskogo paravtokhtona po indeksam okraski konodontov [Estimation of Palaeozoic sedimentary rocks thermal maturity of Northern Pay-Khoy parautochthone on the basis of Conodont colour alteration index]. Litosfera, 2017, no. 1, pp. 44–52.
   Zhuravlev A.V. Sedimentatsionnaya model' oblasti sochleneniya Eletskoy i Lemvinskoy formatsionnykh zon Pripolyarnogo Urala v pogranichnom devonsko-kamennougol'nom intervale [Sedimentation model of the transitional zone from the Elets to Lemva formation belts (Devonian-Carboniferous boundary, Cis-Polar Urals)]. Neftegazovaya Geologiya. Teoriya I Praktika, 2012, vol. 7, no. 4, available at: http://www.ngtp.ru/rub/2/59_2012.pdf

Geochemical research

Section editor – PhD in geology and mineralogy Bazhenova T.K.

Article # 37_2018	submitted on 07/24/2018 displayed on website on 10/19/2018
19 p.	Burdelnaya N.S., Bushnev D.A., Plotitsyn A.N., Gruzdev D.A.
pdf	Organic geochemistry of the Frasnian sections of the northern Chernyshev Ridge area (Timan-Pechora Basin)
	For the first time, data are presented on the geochemistry of organic matter belonging to the Darshor stream section (northern part of the Chernyshev Ridge). Lithologically studied section is represented by siliceous-clay-carbonate rocks with interbedding of fine-grained dark gray to black bituminous limestone. The biostratigraphical data correspond to the upper part of the Sargayev - the lower reaches of the Domanik level of the Frasnian age. The distribution of saturated and aromatic hydrocarbon biomarkers, the isotopic composition of carbon kerogen, bitumoid and its fractions are characteristic for the organic matter of the Domanik Formation of the Timan-Pechora petroleum bearing basin. The data of the conodonts color indexes as well as a number of geochemical parameters indicate the degree of the middle mesocatagenesis (“oil window”). The studied deposits have a significant generation potential characteristic for the Domanik rocks - Timan-Pechora petroleum basin at these stage of catagenesis. Keywords: organic matter, Domanik Formation, mesocatagenesis, Chernyshev Ridge, Timan-Pechora petroleum bearing basin.
article citation	Burdelnaya N.S., Bushnev D.A., Plotitsyn A.N., Gruzdev D.A. Organicheskaya geokhimiya franskikh otlozheniy severnoy chasti gryady Chernysheva (Timano-Pechorskiy basseyn) [Organic geochemistry of the Frasnian sections of the northern Chernyshev Ridge area (Timan-Pechora Basin)]. Neftegazovaya Geologiya. Teoriya I Praktika, 2018, vol. 13, no. 4, available at: http://www.ngtp.ru/rub/2018/37_2018.html
DOI	https://doi.org/10.17353/2070-5379/37_2018

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Stratigraphy and lithology

Section editor – PhD in geology and mineralogy Kirichkova A.I.

Article # 35_2018	submitted on 07/11/2018 displayed on website on 10/17/2018
17 p.	Vevel Ya.A., Zhuravlev A.V., Gruzdev D.A.
pdf	Lower Serpukhovian (Lower Carboniferous) of the Kozhim River basin (Subpolar Urals)
	Results of study of the Visean-Serpukhovian boundary beds of the Kozhym River basin (Nizhniy Nortnichayol’ Creek) are considered. Biostratigraphy based on conodonts, foraminifers, and algae is described. The early Serpukhovian transgression led to sequential environment changes from quite-water shallow inner shoal to active-water shoal border. Correlation of the study section with sequences of the Kosyu-Rogovaya Depression allows elaborating facial model of the Lower Serpukhovian. Keywords: Subpolar Urals, Serpukhovian, conodonts, foraminifers, algae, environments.
article citation	Vevel Ya.A., Zhuravlev A.V., Gruzdev D.A. Nizhniy serpukhov (nizhniy karbon) v basseyne r. Kozhim (Pripolyarnyy Ural) [Lower Serpukhovian (Lower Carboniferous) of the Kozhim River basin (Subpolar Urals)]. Neftegazovaya Geologiya. Teoriya I Praktika, 2018, vol. 13, no. 4, available at: http://www.ngtp.ru/rub/2018/35_2018.html
DOI	https://doi.org/10.17353/2070-5379/35_2018

References

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Otmas N.M., Zhuravlev A.V. Litologo-fatsial'nye osobennosti nizhneserpukhovskikh otlozheniy (nizhniy karbon) yuga podnyatiya Chernysheva i Kos'yu-Rogovskoy vpadiny // Neftegazovaya geologiya. Teoriya i praktika. - 2016. - T.11. - №3. - http://www.ngtp.ru/rub/2/27_2016.pdf. DOI: 10.17353/2070-5379/27_2016
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Vevel' Ya.A., Gruzdev D.A., Zhuravlev A.V. Foraminifery i konodonty melkovodnykh otlozheniy ranneserpukhovskogo vozrasta v razreze na r. Kamenka (yug Pechoro-Kozhvinskogo megavala) [Foraminifers and conodonts from the early Serpukhovian shallow-water deposits of the Kamenka river section (south of the Pechora-Kozhva swell)]. Syktyvkarskiy paleontologicheskiy sbornik (Trudy Instituta geologii Komi nauchnogo tsentra UrO RAN), 2017, vol. 130, no 8, p. 14-23.
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Stratigraphy and lithology

Section editor – PhD in geology and mineralogy Kirichkova A.I.

Article # 19_2018	submitted on 05/14/2018 displayed on website on 06/18/2018
21 p.	Zhuravlev A.V., Vevel Ya.A., Gruzdev D.A.
pdf	Local stratigraphy of the Upper Devonian – Carboniferous of the north of Pay-Khoy
	Analyses of stratigraphical data on Upper Devonian and Carboniferous of the north of Pay-Khoy allow elaborating a new stratigraphic scheme comprising the Pechora and Pay-Khoy formation belts. Correlation of the local stratigraphical units of the belts is based on biostratigraphical and event-stratigraphical methods. A number of interfacial correlative levels corresponding to global eustatic events are detected, namely: Middlesex, Kellwasser, Dasberg, Hangenberg, Late Tournaisian-Early Visean, Mid-Visean, and Mid-Carboniferous. Keywords: stratigraphical data, Upper Devonian, Carboniferous, interfacial correlative level, eustatic events, Pay-Khoy.
article citation	Zhuravlev A.V., Vevel Ya.A., Gruzdev D.A. Mestnaya stratigraficheskaya skhema verkhnego devona i karbona severa Pay-Khoya [Local stratigraphy of the Upper Devonian – Carboniferous of the north of Pay-Khoy]. Neftegazovaya Geologiya. Teoriya I Praktika, 2018, vol. 13, no. 2, available at: http://www.ngtp.ru/rub/2/19_2018.pdf
DOI	https://doi.org/10.17353/2070-5379/19_2018

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   Zhuravlev A.V., Gerasimova A.I. Stroenie razreza i konodonty karskoy svity (nizhniy karbon) Amderminskogo raiona severnogo Pay-Khoya [Sequence composition and conodonts of the Kara Formation (Lower Carboniferous) of the Amderma District of the northern Pay-Khoy]. Vestnik IG Komi SC UrB RAS, 2016, no.1, p. 3. DOI: 10.19110/2221-1381-2016-1-3-10
   Zhuravlev A.V., Gerasimova A.I., Vevel Y.A. Mestnaya stratigraficheskaya skhema verkhnedevonsko-srednekamennougol’nogo intervala severa Paykhoyskogo karbonatnogo paravtokhtona[Local stratigraphical map of Upper Devonian - Middle Carboniferous interval of Northern Pay-Khoy carbonate parautochthone]. Vestnik IG Komi SC UrB RAS, 2015, no. 4, p. 8-13.
   Zhuravlev A.V., Vevel' Y.A. Pozdneturneyskoe sobytie v razrezakh Kos'yu-Rogovskoy vpadiny i ee obramleniya (Timano-Pechorskaya provintsiya) [The late Tournaisian Event in the successions of the Kosyu-Rogovaya Depression and adjacent areas (Timan-Pechora Province)]. Neftegazovaya Geologiya. Teoriya I Praktika, 2018, vol. 13, no. 1, available at: http://www.ngtp.ru/rub/2/3_2018.pdf. DOI: https://doi.org/10.17353/2070-5379/3_2018
   Zhuravlev A.V., Vevel' Y.A. Srednekamennougol'naya granitsa na severe Pay-Khoya – korrelyatsiya melkovodnykh i glubokovodnykh razrezov [The Middle Carboniferous boundary in the north of Pay-Khoy – correlation between the shallow-and deep-water sequences]. Uchenye Zapiski Kazanskogo Universiteta. Seriya Estestvennye Nauki, 2017, vol. 159, no.1, p. 152–163.
   Zhuravlev A.V., Vevel' Y.A., Iosifidi A.G., Tomsha V.A., Chermnykh V.A. Razrez verkhnego devona – nizhnego karbona na myse Kostyanom ostrova Vaigach [Upper Devonian - Lower Carboniferous succession, Kostyanoy Cape, Vaygach Island]. Neftegazovaya Geologiya. Teoriya I Praktika, 2011, vol. 6, no. 1, available at: http://www.ngtp.ru/rub/2/6_2011.pdf

Geochemical research

Section editor – PhD in geology and mineralogy Bazhenova T.K.

Article # 26_2017	submitted on 06/13/2017 displayed on website on 08/18/2017
20 p.	Bushnev D.A., Plotitsyn A.N., Gruzdev D.A., Burdelnaya N.S.
pdf	Famennian organic matter of the southern part of the Chernyshev Ridge (Iz’yayol River section)
	The article presents new data on the stratigraphy and formation conditions of the Famennian siliceous-clayey-carbonate section and about the origin and catagenesis of the belonging organic matter of the Chernyshev Ridge on the Iz’yayol River. The investigated rocks, according to the existing paleofacial reconstructions and new lithological and biostratigraphic (conodonts) data, were formed in the deep-water shelf environment of the western slope of the Kozhym intra-shelf palaeodepression in the crepida and marginifera phases. Hydrocarbons generation potential of the deposits is almost completely realized. The new data are important for understanding of the hydrocarbon generation processes, when realizing the potential of source rocks which had entered in the oil window. Keywords: organic matter, Famennian, siliceous-clayey-carbonate deposits, Chernyshev Ridge.
article citation	Bushnev D.A., Plotitsyn A.N., Gruzdev D.A., Burdel’naya N.S. Organicheskoe veshchestvo famenskikh otlozheniy yuzhnoy chasti gryady Chernysheva (razrez na r. Iz"yael') [Famennian organic matter of the southern part of the Chernyshev Ridge (Iz’yayol River section)]. Neftegazovaya Geologiya. Teoriya I Praktika, 2017, vol. 12, no. 3, available at: http://www.ngtp.ru/rub/1/26_2017.pdf
DOI	https://doi.org/10.17353/2070-5379/26_2017

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Stratigraphy and lithology

Section editor – PhD in geology and mineralogy Kirichkova A.I.

Article # 17_2017	submitted on 02/10/2017 displayed on website on 05/16/2017
13 p.	Zhuravlev A.V., Vevel Ya.A., Gruzdev D.A.
pdf	Characteristic of the pore space in the Upper-Devonian - Carboniferous Carbonate section of the Pai-Khoy Parautochthone unit
	The characteristics of intergrain pore space in the carbonate deposits of the Upper Devonian - Carboniferous Pai-Khoy carbonate parautochtone unit are given. The total and open porosity of carbonate rocks is characterized by low values; however, small pores with an average diameter predominate in the pore space. The main factors controlling the values of intergranular porosity of the Upper Devonian - Carboniferous carbonates are rock texture and the degree of secondary transformations: the porosity is proportional to the detritus size and decreases in thermally matured rocks. Keywords: intergranular porosity, carbonates, Late Devonian – Carboniferous, Pai-Khoy Carbonate Parautochtone.
article citation	Zhuravlev A.V., Vevel Ya.A., Gruzdev D.A. Kharakteristika porovogo prostranstva v porodakh verkhnedevonsko-kamennougol'nogo karbonatnogo kompleksa Pay-Khoyskogo paravtokhtona [Characteristic of the pore space in the Upper-Devonian - Carboniferous Carbonate section of the Pai-Khoy Parautochthone unit]. Neftegazovaya Geologiya. Teoriya I Praktika, 2017, vol. 12, no. 2, available at: http://www.ngtp.ru/rub/2/17_2017.pdf
DOI	https://doi.org/10.17353/2070-5379/17_2017

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