List of Articles کپه داغ

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  1 - Biostratigraphy of the Tirgan Formation in Robat-Eshgh (south-west of Bojnurd) and Ghezelghan (North of Bojnurd) stratigraphic sections, and comparing them with each other.
  nassim Riahi عباس  صادقی Mohammad Hossein Adabi حسین  کامیابی شادان
  In order to study biostratigraphy of the Tirgan Formation in western Kopet Dagh, two surface sections including Navia – Robat Eshgh and Ghezelghan, were selected and 230 samples were collected. The Tirgan Formation was measured with a total thickness of 237 and 192 mete More

  In order to study biostratigraphy of the Tirgan Formation in western Kopet Dagh, two surface sections including Navia – Robat Eshgh and Ghezelghan, were selected and 230 samples were collected. The Tirgan Formation was measured with a total thickness of 237 and 192 meters in Navia and Ghezelghan sections respectively and was represented by thick and sometimes medium bedded, grey and weathered cream colored limestones in two localities. In Navia section, the Tirgan Formation conformably overlies the Zard – Shurijeh Formation with sharp lithological changes. However, as a result of being located in the core of an anticline, this boundary is not determined in Ghezelghan section. The Tirgan Formation disconformably underlies the Abderaz Formation in Navia section while conformably underlies the Sarcheshme Formation at Ghezelghan section. As a result of biostratigraphical investigations, 58 species belonging to 68 genera of foraminifera were identified in the Tirgan Formation. Based on benthic foraminifera two biozones were determined as follows: 1. Palorbitolina lenticularis Taxon Range Zone 2. Novalesia producta – Orbitolina spp. assemblage zone According to the determined biozones and fossils associations, the age of the Tirgan Formation is Barremian – Early Aptian in both sections. The comparison of the Tirgan Formation, in two-mentioned sections, shows some differences. In terms of biostratigraphy, there is not any significant distinctions, except for thickness difference in biozones. Manuscript profile
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  2 - Comparsion of the result of FMS image log and thin sections data in one field of Kopedagh Basin
  زهرا  شمشیری فریدون  سحابی غلامحسین  نوروزی حسین معماریان
  Abstruct Survey and study of porosity and the form and the size of that in oil and gas reservoirs are important due to its key role in reservoir quality and productivity. In this paper, unlike conventional methods of using cores to recogn More

  Abstruct Survey and study of porosity and the form and the size of that in oil and gas reservoirs are important due to its key role in reservoir quality and productivity. In this paper, unlike conventional methods of using cores to recognize the geometry and morphology of porosity, FMS image log and thin section of cutting from drilling are used .after determining the over all dimension of the porosity shown as black patches and spots by FMS log, the shape and the size of the porosity was studied in the form of petrological study,based on thin sections from Mzdouran reservoir formation(lower Jurassic) in one of the gas fields in the East of Kopedagh basin. Tracing and comparing of the results of the two methods show a good correlation for determining the type and geometry of porosity .Data fusion of FMS log data with petrological studies of thin sections of cutting from drilling has advantages the most important of which is the possibility of replacement of core with FMS log and thin sections in order to determining the geometry of porosity. Manuscript profile
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  3 - Biocorrelation, Biostratigraphy and determination basal of the Aptian stage at Tirgan Formation , west of Kopeh-Dagh sedimentary basin, NE Iran
  Atefeh Chenarani Meysam Shafiee Ardestani Mohammad Vahidinia
  10.52547/ispg.33928.11.21.78
  Tirgan Formation (Lower Cretaceous) in the Kopeh-Dagh sedimentary basin consists mainly of Oolitic, Orbitolina, dolomitic limestones that conformably overlies the Shurijeh and Sarcheshmeh formations, respectively. Upper contact of Tirgan Formation at Jozak section with More

  Tirgan Formation (Lower Cretaceous) in the Kopeh-Dagh sedimentary basin consists mainly of Oolitic, Orbitolina, dolomitic limestones that conformably overlies the Shurijeh and Sarcheshmeh formations, respectively. Upper contact of Tirgan Formation at Jozak section with Abderaz Formation is faulty and were placed under white chalky limestone of the Abderaz Formation. Two stratigraphic sections at Estarkhi and Jozak were measured and sampled. Biostratigraphicic studies lead to two benthic foraminifera and calcareous green algae fossil assemblages have been identified. Twenty one genera and 24 species of benthic foraminifera and 16 genera and 26 species of calcareous green alge at Estarkhi section, 21 genera and 26 species of benthic foraminifera and 10 genera and 10 species of calcareous green alge at Jozak section in west of Kopeh-Dagh sedimentary basin have been identified. This study has been suggested the Barremian- Early Aptian( Bedulian) stage for the Tirgan Formation at these localities that is corresponded with age of central and east basin. Also based on paleobio-events study were determined base of the Aptian stage in east of the kopeh-Dagh sedimentary basin base of FA(First Appearance) Dictyoconus pachymarginalis and LA(Last Appearance) Montseciella arabica and in center and west of the basin base of the FAs Palorbitolina lenticularis, Salpingoporella muehlbergii. Manuscript profile
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  4 - Biostratigraphy and paleoecology of Family Gavelinellidae in Sanganeh and Aitamir Formations at the Kopeh-Dagh basin
  Maryam Motamedalshariati Mahmoud Jalali
  10.61186/ispg.41339.11.22.89
  The sedimentary basin of Kopeh-Dagh is located in the northeast of Iran. This sedimentary basin has been of interest for a long time because of hydrocarbon materials. Gavelinellids are the most abundant and dominant groups of benthic foraminifera in epicontinenal seas d More

  The sedimentary basin of Kopeh-Dagh is located in the northeast of Iran. This sedimentary basin has been of interest for a long time because of hydrocarbon materials. Gavelinellids are the most abundant and dominant groups of benthic foraminifera in epicontinenal seas during Cretaceous period which belong to Rotaliinacean foraminifera. They have shown a wide biogeographical distribution and dispersion in many areas of Tethys. Their evolutionary trend during the Cretaceous time was success. The high concentration of marine sedimentary rocks and the absence of igneous activities in the Kope-Dagh sedimentary basinhave caused it to be considered the most suitable basin for the formation and accumulation of hydrocarbons after the Zagros sedimentary basin. This basin has suitable layers of carbonate rocks and porous sandstones to store hydrocarbon materials, also thick layers of shales in this basin can act as suitable source and cap rocks. In this research some genera and species from this family in Sanganeh and Aitamir Formations at five stratigraphic sections including Marave Tappeh, Takal kuh, Sheykh, Gadvecanlou and Kalat from point of biostratigraphical and paleoecological applications have been investigated. In this study, four biozones including Gavelinella flandrini-Gaudryina cf. praedividens assemblage zone, Berthelina intermedia assemblage zone, Berthelina cenomanica Assemblage Zone, Berthelina intermedia-Osangularia schloenbachi Assemblage Zone have been introduced. Based on the reported genera and species of the Gavellinidae family, it can be stated that the studied formations were deposited in the middle and outer part of the continental shelf to the upper part of the continental slope and in aerobic to semi-aerobic environments. The presence of more planktonic foraminifera than benthic foraminifera in the Aitamir Formation, the depth of the basin increases. Manuscript profile