Results 161 to 170 of about 7,697 (210)
Some of the next articles are maybe not open access.
Foraminiferal biostratigraphy of the Miocene Qom Formation, northwest of the Qom, Central Iran
Frontiers of Earth Science, 2017Near Dochah, in the type area of the Qom Formation, Central Iran, the Miocene is partly developed in pelagic facies. From the 894.1 meter thick, ‘a to e’ members of this section, 152 samples were collected. Abundant planktonic foraminifera let us correlate the study section with the global planktonic foraminifera biozonations.
Jahanbakhsh Daneshian +1 more
openaire +1 more source
Miogypsinid biostratigraphy in lower Miocene Qom Formation, Central Iran
Micropaleontology, 2019The Qom Formation of Central Iran consists of carbonates, evaporates and clastics in several depositional cycles, divided into nine members in the type area around Qom city, as best exemplified in the Dobaradar section. Each cycle starts with carbonates, followed by terrestrial and finally evaporate deposits.
Jahanbakhsh Daneshian +1 more
openaire +1 more source
Burdigalian–Serravalian calcareous nannoplanktons from Qom Formation, North-Center Iran
Arabian Journal of Geosciences, 2009The aim of this study is to determine calcareous nannofossil species found in Kamar-Kuh area and demonstrate this use for biostratigraphic studies. The Qom Formation is widely distributed in Kamar-Kuh section and has nine members(a–f). In this study, 12 samples were taken and prepared with smear slide.
Fatemeh Hadavi +2 more
openaire +1 more source
Coupled hydro-mechanical analysis of underground gas storage at Sarajeh field, Qom formation, Iran
Journal of Natural Gas Science and Engineering, 2021Abstract Production or injection of fluids from/in an underground storage site causes variations of pore pressure and stress states. These fluctuations significantly affect implications for hydraulic fracturing, wellbore integrity, top surface subsidence and heave, fault-reactivation, and stability of reservoir and caprock.
Mohsen Bakhtiari +3 more
openaire +1 more source
Benthic Foraminiferal Events of the Qom Formation in the North Central Iran Zone
Paleontological Research, 2019In order to recognize and verify the lower Miocene deposits and the Aquitanian-Burdigalian boundary, benthic foraminifera from different localities in the north of the Central Iran Zone are considered. These facies-controlled foraminifera are useful for biostratigraphical studies, especially in the absence of planktic foraminifera.
Jahanbakhsh Daneshian +1 more
openaire +1 more source
Depositional environment of the evaporitic unit (D-member) of the Qom Formation (Central Iran)
Carbonates and Evaporites, 2007The Qom Formation, in the Central basin of Iran, is characterized by shallow marine limestone and lagoonal facies. The D-member, one of the six major members of the Formation, is dominated by gypsum (anhydrite). Several types of textural and structural features have been recognized in this unit.
Mahmoud Khalili +2 more
openaire +1 more source
Microfacies and depositional environments of the Qom Formation in Barzok area, SW Kashan, Iran
Carbonates and Evaporites, 2018Qom Formation (Oligo-Miocene marine deposits of Middle Iran) in the southwestern Kashan was studied to determine its microfacies and depositional environments. Outcrops of the Qom Formation in the study area with 410 m, consist mainly of limestone, sandy limestone, shale and marl.
Ebrahim Mohammadi +3 more
openaire +1 more source
Early Miocene benthic foraminifera and biostratigraphy of the Qom Formation, Deh Namak, Central Iran
Journal of Asian Earth Sciences, 2007Abstract A total of 165 samples were collected from the Qom Formation investigated in a stratigraphic section north of Deh Namak, in Central Iran. From these, 35 genera and 47 species of benthic foraminifera were identified. The age of the studied section is Early Miocene (Aquitanian to Early Burdigalian) based on the occurrence of Borelis melo ...
Jahanbakhsh Daneshian +1 more
openaire +1 more source
Sedimentology and Reservoir Characterization of the Qom Formation, Central Iran Basin
Journal Of The Geological Society Of IndiaABSTRACT The Qom Formation has been considered as a significant reservoir succession in Central Iran forming various hydrocarbon fields. The geological data from four wells from the two hydrocarbon fields (I and II) have been investigated for a reconstruction of sedimentary and diagenetic environments as well as reservoir quality of the ...
Seyed Behzad Mirzadeh Vaghefi +4 more
openaire +1 more source
Revision of the age of the Qom Formation in the Central Iran Basin, Iran
Journal of Asian Earth Sciences, 2007Abstract The Qom Formation in the Central Iran Basin contains not only relatively abundant calcareous nannofossils and a small number of dinoflagellate cysts, but also a number of stratigraphically significant benthonic foraminifers and ostracods. Calcareous nannofossils reported for the first time from this formation include Coccolithus pelagicus ,
Youhua Zhu +8 more
openaire +1 more source