R Shabanian; N Ghanizadeh
Abstract
The Illanqareh Formation consists of sandstone, shale, dolomite, extrusive igneous rocks, and limestone. This Formation is about 400 m thick and crops out in the west of Illanlu village, south of the Aras dam, north of the West Azarbaijan province. The clastic deposits of the Illanqareh formation attributed ...
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The Illanqareh Formation consists of sandstone, shale, dolomite, extrusive igneous rocks, and limestone. This Formation is about 400 m thick and crops out in the west of Illanlu village, south of the Aras dam, north of the West Azarbaijan province. The clastic deposits of the Illanqareh formation attributed to the late Devonian and the upper carbonate division belongs to the early Carboniferous. The study of prepared thin sections resulted in recognizing 15 species related to 9 genera of 8 foraminifera families. The comparison of identified foraminifera' assemblage in the studied stratigraphical section with those from other Carboniferous formations of Iran and the world indicated a Tournasian- Visean age for the marine deposits of this formation. The Illanqarah formation in the Illanlu section overlies the early Devonian Muli formation and underlies the early Permian Doroud formation both disconformably.
B. Zamani Gharechamani
Abstract
Iranian Azerbaijan is a region in Northwest of Iran where has large active deformation and seismicity. It is located between two orogeny, Zagros in the south and Lesser Caucasus in the north. In this research geological structures and tectonic stress state of area are studied to search connection the ...
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Iranian Azerbaijan is a region in Northwest of Iran where has large active deformation and seismicity. It is located between two orogeny, Zagros in the south and Lesser Caucasus in the north. In this research geological structures and tectonic stress state of area are studied to search connection the tectonic and neotectonic of Azerbaijan. In this study the analytical method of Angelir, 2002, is used to analising the stress tensors. Also his methods, 1984 and 2004, are used to separation of stresses. Firstly it is collected seismic and field data of faults and analyzing their stress states. Then 2nd order stress field of Azarbaijan microplate is reconstructed by stress separation analysis. Also remote sensing methods helps to study of imbricate structures in the northern and southern parts of Azarbaijan microplate. The stress analysis results in this study (by analytical method, for seismic and field data) shown there are two compressional stresses (NE-SW and NW-SE directions). First stress system by NE-SW directions cause developing of three tectonic grains as Arasbaran, Ahar (Goshe Dagh) and Bozkosh fold thrust belts. But the second one (NE-SE direction stress system) cause developing of thrusts in N-S direction. Reconstruction of first order stress in relation with the tectonic grains, and structures, reduced the tectonic model of Azerbaijan plateau. In this model the (East) Azerbaijan plateau is in collision with Lesser Caucasus in north, South Caspian basin in east, and Central Iranian block in south and west. In this way reconstructed compression induced the conter-clock wise rotation to the Azerbaijan plateau.
R. Shabanian; Kh. Khosrow Tehrani; I. Momeni
Abstract
Various stratigraphical sections of the Permian rocks in the northwest of Iran (Azerbaijan) shows that this sequence consists of Doroud, Ruteh, and Nesen formations in the southern flanks and Doroud, Surmaq , Julfa and Ali-Bashi formations in Zal and Illanlu sections.
The analysis and study of forminifera ...
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Various stratigraphical sections of the Permian rocks in the northwest of Iran (Azerbaijan) shows that this sequence consists of Doroud, Ruteh, and Nesen formations in the southern flanks and Doroud, Surmaq , Julfa and Ali-Bashi formations in Zal and Illanlu sections.
The analysis and study of forminifera assemblages in the carbonate sequence of the area and the comparison of these microfossils with other parts of Iran and neighbouring countries indicate that the age of carbonate units is Kubergandian to Dorashamian in Zal and Illanlu areas and Kubergandian to Djulfian in others sections. Throughout the Azerbaijan, Lower Permian shows a great hiatus.
Field investigation, rock and microfacies studies show many progressive and regressive phases in the Permian sequence of Azerbaijan.
