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Kazan Golovkinsky Stratigraphic Meeting Kazan Golovkinsky Stratigraphic Meeting 2017 Kazan Federal University Institute of Geology and Petroleum Technologies Kazan Golovkinsky Stratigraphic Meeting,19 - 23 September , 201 7 , Kazan, Russia ISBN 978-5-00019-273-3 9 785908010 810962279323 > Kazan Federal University Institute of Geology and Petroleum Technologies Kazan Golovkinsky Stratigraphic Meeting – 2017 and Fourth All-Russian Conference “Upper Palaeozoic of Russia” Upper Palaeozoic Earth systems high-precision biostratigraphy, geochronology and petroleum resources Abstract Volume 19–23 September 2017, Kazan, Russia KAZAN 2017 UDC 551.736.3(470.4) К25 Scientific editors: Danis K. Nurgaliev, Vladimir V. Silantiev Technical editor Veronika V. Zharinova Kazan Golovkinsky Stratigraphic Meeting – 2017 and Fourth All-Russian Conference К25 “Upper Palaeozoic of Russia”. Upper Palaeozoic Earth systems: high-precision biostratigraphy, geochronology and petroleum resources. Abstract volume. Kazan, September, 19–23, 2017 / D.K. Nurgaliev, V.V. Silantiev (Eds.). – Kazan: Kazan University Press, 2017. – 234 p. ISBN 978-5-00019-855-1 Abstract Volume was compiled for the Kazan Golovkinsky Stratigraphic Meeting, 2017 and Fourth All-Russian Conference “Upper Palaeozoic of Russia”. The publication was supported by the Russian Foundation for Basic Research (project no. 17-05-20511) UDC 551.736.3(470.4) ISBN 978-5-00019-855-1 © Kazan University Press, 2017 Казанский федеральный университет Институт геологии и нефтегазовых технологий Международная стратиграфическая конференция Головкинского – 2017 и Четвертая Всероссийская конференция «Верхний палеозой России» Планетарные системы верхнего палеозоя биостратиграфия, геохронология и углеводородные ресурсы Сборник тезисов 19–23 сентября 2017 г., Казань, Россия КАЗАНЬ 2017 УДК 551.736.3(470.4) М43 Научные редакторы Д.К. Нургалиев, В.В. Силантьев Составитель В.В. Жаринова Международная стратиграфическая конференция Головкинского – 2017 М43 и Четвертая Всерос сийская конференция «Верхний палеозой России». Планетар- ные системы верхнего палеозоя: биостра тиграфия, геохронология и углеводород- ные ресурсы (19–23 сентября 2017 г., Казань, Россия) / под ред. Д.К. Нургалиева, В.В. Силантьева. – Казань: Изд-во Казан. ун-та, 2017. – 234 с. ISBN 978-5-00019-855-1 Сборник тезисов составлен для Международной стратигра фической конференции Головкин- ского – 2017 и Четвертой Всероссийской конференции «Верхний палеозой России». Опубликовано при поддержке Российского фонда фундаментальных исследований (проект № 17-05-20511) УДК 551.736.3(470.4) ISBN 978-5-00019-855-1 © Издательство Казанского университета, 2017 SEQUENCE STRATIGRAPHY OF THE APTIAN TO TURONIAN INTERVAL IN THE TARFAYA-LÂAYOUNE BASIN, SOUTHERN MOROCCO Mohamed Abioui1, Danièle Grosheny2, Nourissaid Içame1, Serge Ferry3, Mohammed Benssaou1, Mohamed Aoutem1 1 Ibn Zohr University, Department of Sciences, Geology Department, Laboratory of Applied Geology and Geo-Environmental, B.P. 8106, Cité Dakhla 80000, Agadir, Morocco 2 University of Lorraine, Faculty of Sciences and Technology, UMR 7359 GeoRessources, BP 70239, 54506 Vandœuvre-lès-Nancy, France 3 Retired, University of Lyon, Faculty of Sciences and Technology, 43 Bd du 11 Novembre, 69622 Villeurbanne cedex, France The present study focuses on the sedimentation and stratigraphic evolution of the mixed siliciclastic-carbonate Aptian-Turonian deposits cropping out in the Tarfaya-Lâayoune Basin of the Moroccan Sahara. The central purpose of this work is to document the sedimentary facies and their depositional and environmental significance, and interpret them in a sequence stratigraphic context. The study explores the possible controls on sedimentation and stratigraphic architecture during Aptian-Turonian. The Tarfaya-Laayoune Basin is an Atlantic basin of passive margin. It belongs to a series of basins developed along the northwest African margin, following the opening of the central Atlantic. It is a Meso-Cenozoic basin, considered as an oil province, which has been infuriated by oil companies, following recent discoveries. The Tarfaya-Laayoune Basin is bounded to the North by the Anti-Atlas, to the South by the Mauritanides, to the East by the Reguibats, and to the West by the Atlantic Ocean (Figure 1). The Aptian-Turonian strata contain a wealth of sedimentary features that are applicable in fields of mixed siliciclastic-carbonate facies analysis and sequence stratigraphy. The strata are enriched in well diversified chronostratigraphically significant fossils such as ammonite and foraminifera, which allows dating of sequence stratigraphic surfaces and therefore correlation with published global sea-level curves. Macroscopic and microscopic features of sedimentary facies will be described using both field (colour, grain size, bed contacts, physical and biogenic sedimentary structures and stratigraphic position) and thin section observations particularly for carbonate deposits. The results of stratigraphic and sedimentological studies will be integrated and correlated with the available subsurface well log data. The study will help to reconstruct the Neocomian platform series of Tan-Tan offshore drilling, and to understand the turbidite system previously described from the offshore. The present study has an advantage as it provides the first comprehensive sedimentologic and sequence stratigraphic interpretations of the Aptian- Turonian strata in the Tarfaya-Lâayoune basin, Southern Morocco. 5 Figure 1: [A] Geographic position of Tarfaya-Laayoune Basin (Southern Morocco), indicated by a square. [B] Location of the measured sections of the Tarfaya-Lâayoune basin (Google Earth®). Geological abbreviations: B: Paleozoic basement; M: Miocene; N: Neocomian; MA: Middle Albian; UA: Upper Albian; LA: Lower Albian; Ce-Tu: Cenomano-Turonien. Acknowledgment: This work was conducted as part of the PHC Volubilis-Toubkal No. MA/14/305 (Lorraine University and Ibn Zohr University). We are indebted to the Faculty of Sciences of Agadir (Morocco) for providing field facilities. Ferry, S. (2012): Réflexions sur la régression gargasienne (Europe, Afrique du Nord, Moyen-Orient). Réunion Thématique du groupe Français du Cétacé: «Événements de l’Aptien-Albien», 3 et 4 décembre 2012, Paris, pp. 16–17 (in French). Grosheny, D., Içame, N., Ferry, S., Malartre, F., Robert, E. & Abioui, M. (2015): The main steps of the Cre- taceous onlap on the African craton (Tarfaya-Laayoune basin, South Morocco). Réunions thématiques du Groupe Français du Crétacé (GFC), les limites d’étages et les étages du Crétacé, 30 novembre et 1 décembre 2015, Paris, pp. 6–7. Grosheny, D., Içame, N., Ferry, S., Bulot, L., Masrour, M., Bettar, I., Aoutem, M. & Essafraoui, B. (2012): La série Apto-albienne du bassin marginal de Tarfaya (Maroc méridional). Réunions Thématique du groupe Français du Cétacé: «Événements de l’Aptien-Albien», 3 et 4 décembre 2012, Paris, pp. 23–27 (in French). 6 ECO-ZONES OF EARLY PERMIAN RADIOLARIANS IN THE GREAT URALS, NORTHERN MYGODZHARY AND PRECASPIAN BASIN Marina S. Afanasieva, Edward O. Amon Borissiak Paleontological Institute, Russian Academy of Sciences, Moscow, Russia Detailed studies of the Early Permian radiolarians of the Southern Urals and Northern Mugodzhary ridge were started almost simultaneously by pioneering works of H. Kozur (1980– 1989), B.B. Nazarov and A.R. Ormiston (1981–1993), and our research since 1986. Nazarov and Ormiston developed the radiolarian Early Permian biostratigraphic scale, counting 10 biostratons with characteristic radiolarian assemblages (see table below). Our comprehensive study of Early Permian radiolarians of Southern Urals, Northern Mygodzhary and Northern PreCaspian regions (Afanasieva, Amon, 2014–2017) based on own and literature paleontological data for 12 reference sections. At present, we consider as valid 18 Early Permian radiolarian assemblages (see table below), six of which are established for the first time. Asselian radiolarians are differentiated into four characteristic assemblages: earlier known Latentifistula crux, Tormentidae, and two newly assigned: Pseudoalbaillella u-forma – Ps. elegans and Tetragregnon sphaericus – Latentifistula heteroextrema. Sakmarian radiolarians are represented by seven assemblages: Nazarovispongus permicus, Latentidiota circumfusum – Apophysiacus pycnoclada, Camptoalatus monopterygius, Copiellintra bispina, Rectotormentum fornicatum, and three newly assigned: Polyentactinia cisuralica – Pluri stratoentactinia tetrasphaera and Arcoclathrata alekseevi – Apophysiacus sakmaraensis. Artinskian radiolarians are summarized in six assemblages: Arcoclathrata crassiclathrata – Quinqueremis arundinea, Copicyntra acilaxa, Tetracircinata reconda, Polyentactinia lautitia, and two newly assigned Spongentactinia rigida and Entactinia pinrasensis – Microporosa rozhnovi. Kungurian radiolarians are represented by the Pluristratoentactinia uralica – Pseudolithelius permicus assemblage. Middle and Late Permian radiolarians are unknown in the Urals, Northern Mygodzhary and PreCaspian Basin. The stratigraphic positions of the designated radiolarian assemblages are defined according to key groups of microfauna – Foraminifera and Conodonta (see table), due to joint findings in the same beds. This enables high-precision intra- and inter-regional correlations, and the dating of key events in the development of radiolarian fauna of the regions studied. The west of the Great Urals Region belonged to the comparatively narrow and long CisUralian Paleosea at the Early Permian Epoch. This paleobasin connected
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