Biostratigraphy and Paleoenvironments of the Oligocene Deposits (Qom Formation) in the Neyzar Area (Southeast of Salafchegan), Iran

2021 ◽  
Vol 25 (2) ◽  
Author(s):  
Amrollah Safari ◽  
Hossein Ghanbarloo ◽  
Saber Mahmudi Purnajjari ◽  
Hossein Vaziri Moghaddam
Keyword(s):  
Qom Formation

scholarly journals Amount and location of tectonic uplift in the Urmia region of northwest Iran from the Permian to the Neogene

2021 ◽  
Vol 3 (3) ◽  
Author(s):  
Akram Alizadeh
Keyword(s):  
Hypersaline Lake ◽  
Time Interval ◽  
Lake Basin ◽  
Lake Urmia ◽  
Qom Formation ◽  
Northwest Of Iran ◽  
The Subject ◽  
Orogenic Uplift ◽  
East Azerbaijan ◽  
Urmia Lake Basin

AbstractThe Urmia Lake Basin is located between the West and East Azerbaijan provinces in the northwest of Iran. Lake Urmia is the twentieth largest lake and second largest hypersaline lake in the world. Stratigraphic columns have been constructed, using published information, to compare the sedimentary units deposited from the Permian to the Neogene on the east and west sides of the lake, and to use these to quantity subsidence and uplift. East of the lake, the sedimentary section is more complete and has been the subject of detailed stratigraphic studies, including the compilation of measured sections for some units. West of the lake, the section is incomplete and less work has been done; three columns illustrate variations in the preserved stratigraphy for the time interval. In all cases, the columns are capped by the Oligocene–Miocene Qom Formation, which was deposited during a post-orogenic marine transgression and unconformably overlies units ranging from Precambrian to Cretaceous. Permian to Cretaceous stratigraphy is used to measure subsidence in the Lake Urmia basin up to the end of the Cretaceous, and then, the subsequent orogenic uplift, which was followed by further subsidence recorded by the deposition of the Qom Formation in the Oligocene–Miocene.

Burdigalian–Serravalian calcareous nannoplanktons from Qom Formation, North-Center Iran

2009 ◽  
Vol 3 (2) ◽  
pp. 133-139 ◽  
Author(s):  
Fatemeh Hadavi ◽  
Marziyeh Notghi Moghaddam ◽  
Hoda Mousazadeh
Keyword(s):  
Qom Formation

scholarly journals Reconstruction of the depositional sedimentary environment of Oligocene deposits (Qom Formation) in the Qom Basin (northern Tethyan seaway), Iran

Geologos ◽  
2020 ◽  
Vol 26 (2) ◽  
pp. 93-111
Author(s):  
Amrollah Safari ◽  
Hossein Ghanbarloo ◽  
Parisa Mansoury ◽  
Mehran Mohammadian Esfahani
Keyword(s):  
Sea Level ◽  
Sedimentary Environment ◽  
Depositional Environments ◽  
Sea Level Changes ◽  
Third Order ◽  
Depositional Sequences ◽  
Qom Formation ◽  
Tethyan Seaway ◽  
Qom Basin ◽  
Global Sea Level

AbstractDuring the Rupelian–Chattian, the Qom Basin (northern seaway basin) was located between the Paratethys in the north and the southern Tethyan seaway in the south. The Oligocene deposits (Qom Formation) in the Qom Basin have been interpreted for a reconstruction of environmental conditions during deposition, as well as of the influence of local fault activities and global sea level changes expressed within the basin. We have also investigated connections between the Qom Basin and adjacent basins. Seven microfacies types have been distinguished in the former. These microfacies formed within three major depositional environments, i.e., restricted lagoon, open lagoon and open marine. Strata of the Qom Formation are suggested to have been formed in an open-shelf system. In addition, the deepening and shallowing patterns noted within the microfacies suggest the presence of three third-order sequences in the Bijegan area and two third-order depositional sequences and an incomplete depositional sequence in the Naragh area. Our analysis suggests that, during the Rupelian and Chattian stages, the depositional sequences of the Qom Basin were influenced primarily by local tectonics, while global sea level changes had a greater impact on the southern Tethyan seaway and Paratethys basins. The depositional basins of the Tethyan seaway (southern Tethyan seaway, Paratethys Basin and Qom Basin) were probably related during the Burdigalian to Langhian and early Serravallian.

The Oligo-/Miocene Qom Formation (Iran): evidence for an early Burdigalian restriction of the Tethyan Seaway and closure of its Iranian gateways

2007 ◽  
Vol 98 (3) ◽  
pp. 627-650 ◽  
Author(s):  
M. Reuter ◽  
W. E. Piller ◽  
M. Harzhauser ◽  
O. Mandic ◽  
B. Berning ◽  
...  
Keyword(s):  
Qom Formation ◽  
Tethyan Seaway

Revision of the age of the Qom Formation in the Central Iran Basin, Iran

2007 ◽  
Vol 29 (5-6) ◽  
pp. 715-721 ◽  
Author(s):  
Youhua Zhu ◽  
Yuping Qi ◽  
Binggao Zhang ◽  
Hengren Yang ◽  
Chengquan He ◽  
...  
Keyword(s):  
Central Iran ◽  
Qom Formation

Microfacies and depositional environments of the Qom Formation in Barzok area, SW Kashan, Iran

2018 ◽  
Vol 34 (4) ◽  
pp. 1293-1306 ◽  
Author(s):  
Ebrahim Mohammadi ◽  
Mahboubeh Hasanzadeh-Dastgerdi ◽  
Amrollah Safari ◽  
Hossein Vaziri-Moghaddam
Keyword(s):  
Depositional Environments ◽  
Qom Formation
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