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Download Full Article in PDF Format Stratigraphie correlation of the Upper Permian deposits from the south of the Cis-Ural marginal Trough and the adjacent areas of the Russian Plate Ijia I. MOLOSTOVSKAYA Institute of Geology, Saratov State University, Moskovskaja street, 161, 410750 Saratov, (Russia) Molostovskaya I. I. 1997. — Stratigraphie correlation of the Upper Permian deposits from the south of the Cis-Ural marginal Trough and the adjacent areas of the Russian Plate, in Crasquin-Soleau S. & De Wever P. (eds), Peri-Tethys: stratigraphie correlations, Geodiversitas 19 (2) : 247-259. ABSTRACT Studied in detail were about 100 sections of the Upper Permian marine and continental deposits from the South Cis-Urals: from the south-eastern edge of the Russian Plate and the Cis-Ural Trough. Characteristic complexes of marine and non-marine ostracodes were distinguished. All the regional strati- KEYWORDS graphic units of the Upper Permian were characterized in detail from micro- Upper Permian, stratigraphy, paleontologic point of view. Associated organic remains were specified: correlation, tetrapods, bivalves, miospores. Brief lithologo-facies descriptions of the sec­ South Cis-Urals, tions from various structural zones are presented. Detailed correlations of the Cis-Ural Trough, Russian Plate. Upper Permian sections from the South Cis-Urals were carried out. RESUME Une centaine de coupes dans les dépôts marins et continentaux du Permien supérieur du Cis-Oural sont étudiées en détail : de l'extrémité sud orientale de la plate-forme jusqu'à la dépression du Cis-Oural. Des assemblages d'ostracodes marins et continentaux sont distingués. Toutes les unités strati- MOTS CLÉS graphiques régionales sont caractérisées en détail du point de vue micropa- Permien supérieur, stratigraphie, léontologique. Les bio-restes associés sont spécifiés : tétrapodes, bivalves, corrélations, miospores. De brèves descriptions des faciès et de la lithologie sont présentées Sud Oural, pour les différentes zones structurales. Des corrélations détaillées pour les Cis-Oural, plate-forme russe. coupes du Permien supérieur sont conduites. GEODIVERSITAS • 1997 • 19(2) 247 Molostovskaya I. I. INTRODUCTION The present paper deals with stratigraphic corre­ lations and complex biostratigraphic description The Permian system is distinguished for the of the Upper Permian deposits from the southern wide-scale distribution of continental deposits in Cis-Urals, one of the most complicated geologic Gondwana and Laurasia. It is extremely difficult regions embtacing the junction zone of the to divide or correlate these deposits due to their south-east of the Russian Plate, Cis-Ural facial variations and scarcity of organic remains. Marginal Trough and Peri-Caspian Depression. The Upper Permian continental formations from Special attention was paid to ostracodes, which the east of European Russia are exceptional in formed the basis for section divisions and corre­ the respect, because diverse fossils have been lations. The research was founded on well and found and studied there: ostracodes, bivalves, natural section descriptions made by the authot conchostracans, tetrapods, fishes, flora and mio- in the process of geologic survey and thematic spores. Tetrapods and ostracodes are among wotks, and on the materials presented in the those most studied. Due to their common occur­ papers by Kuleva (1975) and Kochetkova rence and fast evolutionary variability, ostracodes (1970). Ostracode studies were performed by the have become the leading fauna in regional corre­ author. Besides the original material, definitions lations. They may prove to be important for dis­ by Kochetkova & Spirina (in Kuleva 1975) were tant stratigtaphic correlations as well. used, in some cases provided with new sttati- FlG. 1. — The Upper Permian sections from the South-East of the Yergabusha River (P2t,). 47, Oslpovka, the Budenya the Russian Plate and Cis-Ural marginal deflection. P2u, (P2kz2). 48, Karatalka, the Teiryuk River (P2kz2). 49, Uflmian; P2kz, Lower Kazanian; P2kz2, Upper Kazanian; P2t,, Rodnikovsk, the Teiryuk River (P2kz2). 50, Verkhotor, the Tor sd Lower Tatariari; P2t2 , Upper Tatarlan (North Dvina horizon); River (P2kz2). 51, Voskresenskoye, the Tor River (P2t,). 52, vl sd vl P2t2 , Upper Tatarlan (Vyatka horizon); T,, Lower Trlassic. Vesyoly, the Nugush River (P2t,, P2t2 , P2t2 ). 53, Krasnogorka, vl 1, Novo-Kandaurovka, the Chekushu - the Sukhalya River tribu­ the Nugush River (P2t2 ). 54, Lipovka (P2t2). 55, Alexandrovka, tary (P2u, P2kz,, P2kz2). 2, Korneyevka, the Sukhalya River the Nugush river (P2kz,, P2kz2, P2t,). 56, Yumaguzlno, the sd vl (P2kz2). 3, Yumaty, the Sukhalya River (P2kz,, P2kz2). 3", Meleuz (P2t2 , P2t2 ). 57, Kadyrovo, the Menyu River (P2t,). 58, Talmasovo, the Bol. Kuyurgara River (P2kz,, P2kz2). 4, Malakanovo (P2kz,). 59, Sergeyevsklj, the Chukur - Bulyak Yalchlkayevo, the Shaltanka River (P2u, P2kz,). 5, Well 104, River - the Bolshoj Yushatur tributary (P2t,). 60, Chernigovskij sd Byelozyorka, the Salmysh River (P2u, P2kz,, P2kz2). 6, (P2t2 ). 61, Bekechevo, the Nakuz River (P2kz,, P2kz2, P2t,). v1 Karmalka, the Salmysh River (P2kz,, P2kz2). 7, Well 124, 62, Savelyevsklj (P2t2 )- 63, Sankinskij (P2t2»'). 64, sd Petrovka (P2u, P2kz,, P2kz2, P2t,). 8, Well 122, Verkhni Gumbet Raznomolka, the Tugostemir River (P2t2 ). 65, Slavyanka (P2u, P2kz,, P2kz2, P2t,). 9, Well 123, Voskresenskoye (P2u, (P2kz2, P2t,). 66, Allaberdlno (P2kz2). 67, Davletkulovo, the sh P2kz,, P2kz2, P2t,). 10, Well 13 , the Shestimlr River (P2kz2, Yaman-Yushatyr River (P2kz2, P2t,). 68, Well 28 and well 43, sh P2t,). 11, Well 12 , the Shestlmir River (P2u, P2kz,, P2kz2). 12, Davletkulovo (P2kz,, P2kz2, P2t,). 69, the Tashla River (P2kz2, sd Nizhni Babalar (P2kz,). 13, Well 388, Yanglz (P2u, P2kz,, P2kz2, P2t,). 70, Alexandrovka, the Kuplya River (P2t2 ). 71, Urman- k sd P2t,). 14, the Shestimlr River (P2kz2, P2t,). 15, Well 152 , Tashla (P2t2 ). 72, Kastehnsklj, the Bolshol Yushatur River Maryevka, the Salmysh River (P2u, P2kz,, P2kz2, P2t,). 16, basin (P2V). 73, Maslovsklj, the Bolshol Yushatur River basin k Well 157 , Maryevka (P2u, P2kz,, P2kz2). 17, Brody Spring (P2t2»'). 74, Smlrnovka (P2t2"). 75, Alebastrovaya (P2y). 76, k vl (P2kz2, P2t,). 18, Well 3, Brody (P2u, P2kz,). 19, Well 43 , Cherepanovka, the Burunchar River (P2t2 ). 77, Well 41, Tiryak-Lizyak (P2u, P2kz,, P2kz2). 20, Well 48\ (State farm) Staroseika, the Bolshoi Ik River (P2kz,, P2kz2). 78, Staroseika sd Oktyabrsklj (P2kz2, P2t,). 21, Well 55, Budyonnovsklj (P2t,, (P2kz2). 79, Dmltriyevskij (P2t,, P2t2 ). 80, Well 4> and 5', sd k sd P2t2 ). 22, Well 52 , Anatolyevka, the Salmysh River (P2u, Dmltriyevsklj (P2kz2, P2t,, P2t2 ). 81, Stary Kazlair, the Chena k P2kz,, P2kz2). 23, Well 2 , Sakmara (P2u, P2kz,, P2kz2, P2t,). 24, River (P2kz2). 82, Novosyolki, the Chena River (P2t,). 83, k k Well 1 , Sakmara (P2kz,, P2kz2). 25, Well 31 , Grebenl (P2kz,, Kholmogory, the Bolshoi Ik River (P2t,). 84, Novokulchumovo, sd P2kz2, P2t,). 26, Krasny Gully, Grebenl (P2u, P2kz,, P2kz2, P2t,j. the Sakmara River (P2t2 , P2t2»<). 85, Well 121, k k 27, Well 5 , Grebeni (P2u, P2kz,, P2kz2). 28, Well 7 , Grebenl Novokulchumovo (P2kz2, P2t,). 86, Vyazovka, the Ural River k sd (P2kz,, P2kz2). 29, Well 39 , Grebeni (P2kz,, P2kz2, P2t,). 30, (P2t2 , P2t2»'). 87, Well 102, Vyazovka, (P2kz2, P2t,). 88, Well 6», Chebenki (P2kz2, P2t,). 31, Well 30, Nezhenka (P2u, Well 19«, Ostrovnoye, the Ural River (P2kz,, P2kz2, P2t,). 89, k P2kz,, P2kz2, P2t,). 32, Orenburg (P2kz,). 33, Well 70 , Bolshoj Blumental Gully, the Burtya river (P2y, T,). 90, Zholtoye, the k sd Sulak (P2kz,, P2kz2). 34, Well 94 , Bolshoj Sulak (P2u, P2kz,, Sakmara River (P2kz2). 91, Glryal, the Ural River (P2t2»", P2t2 ). sd P2kz2, P2t,, P2t2 ). 35, Well 80, Dzhuan-Tyublnskaya (P2kz,, 92, Well 73, Actlvny (P2kz2, P2t,). 93, Well 44, k P2kz2, P2t,). 36, Well 79 , Dzhuan-Tyubinskaya (P2u, P2kz,, Verkhneozernoye, the Ural River (P2kz,). 94, Verkhneozernoye sd k P2kz2, P2t,, P2t2 , P2t2>«). 37, Well 98 , Karavanny (P,k2, T,). 38, (P2kz2, P2t,). 95, Wells profile 5-22, the Burly River (P2t„ PJtf, 1 1 Well 59 , Boyevaya Mt. (P2kz2). 39, Well 60 , Boyevaya Mt. P2t2v). (P kz,, P kz ). 40, Well 531, Boyevaya Mt. (P kz , P t,). 41, 2 2 2 2 2 2 a, outcrop exposure, b, well. C, boundary of the Cis-Ural margi­ Wells 61k-67k, Krasnoyarka (P kz,, P kz , P t,). 42, Well 73k, 2 2 2 2 nal deflection, d, boundary of Peh-Casplan Depression. A-B, Kamennaya (P u, P kz,, P kz , P t,, P t sd, P t vl). 43, 2 2 2 2 2 2 2 2 2 the line of the sections studied In Fig. 2. C-D, the line of the Yelshanka (P \ *, T,). 44, Korneyevka, the Yarykly River (P2kz). 2 2 sections studied In Fig. 3. E-F, the line of the sections studied in 45, Yeldashevo, the Yurgashka River (P t,). 46, Skvorchlkha, 2 Fig. 4. 248 GEODIVERSITAS • 1997 • 19(2) Stratigraphie correlation of the Upper Permian, South Ural GEODIVERSITAS • 1997 • 19(2) 249 Molostovskaya 1.1. graphic interpretations. dominate in the section, marl, limestone and Bivalve complexes were studied by Kuleva dolomite interlayers are rare. Rock gypsification (1975), fish by Minikh & Minikh {in Ochev et is characteristically observed, significant in the al. 1979), conchostracans by Lopato {in Kuleva lower portion (Fig. 2). The thickness varies from 1975), miospores by Shatkinskaya (Efremov & 75 to 190 m. Diverse organic remains occur: Shatkinskaya 1972). Tetrapod definitions belong ostracodes, bivalves, conchostracans, miospores. to Tverdokhlebova, Chudinov & Ochev {in Ostracodes. Paleodarwinula abunda Ochev et al.
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