نتایج جستجو برای: Zagros Orogenic Belt
تعداد نتایج: 19712 فیلتر نتایج به سال:
Ophiolitic rocks in the southeastern part of the Zagros Orogenic Belt can be separated from southwest to northeast, into two groups: the Neyriz ophiolites and the Naien–Shahrebabak–Baft ophiolites. The southeast sector of Sanandaj-Sirjan wasdelimited by the two nearly synchronous ophiolitic belts in its southwestern and northeastern margins. In this study, new ophiolitic formation models were u...
The oblique collision between the northeastern margin of Arabian platform and Iranian microcontinent has led to transpressional deformation in Zagros orogenic belt central part Alpine–Himalayan belt. Although previous articles have emphasized dextral sense shear belt, this paper, using several indicators kinematic upon field checking microscopic thin-section studies, evidence development a sini...
dehbid mylonite nappes associated with the tutak gneiss dome as the zagros hinterland involved-basement window in the zagros orogenic belt has significant components of dextral sense of shear along the mylonite nappes and are related to the high proportion of simple shear relative to pure shear deformation. kinematic vorticity analysis (wk) was made in order to determination of relative amounts...
On the basis of geothermobarometric calculations, amphiboles in volcanic and subvolcanic rocks belong to Upper Jurassic volcanism of Sanandaj-sirjan zone in north of Shahrekord. Using Hamarstrom ,Schmidt, Johnson - Rutherford and Hollister methods, amphiboles have crystallized about 635 to 715◦ c and 2.68 to 7.5 kbar at the depth about 17 to 25 km. The result of calculations has moderate accura...
s (underlined = graduate student; * = postdoctoral scholar) [128] Anderson, R.B., Long, S.P., Horton, B.K., Calle, A., and Stockli, D.F., 2014, New apatite and zircon (UTh)/He constraints on the timing of thrust-related exhumation in the southern Bolivian (21 ̊S) Andes: AGU Fall Meeting. [127] Barber, D., Stockli, D.F., Koshnaw, R.I., Horton, B.K., and Kendall, J.J., 2014, Detrital zircon U-Pb a...
Based mainly on field geological observation and geochronologic data, six tectonic units have been recognized in western Inner Mongolia (China), including, from south to north: North China Craton (NCC), Southern Orogenic Belt (SOB), Hunshandake Block (HB), Northern Orogenic Belt (NOB), South Mongolia microcontinent (SMM), and Southern margin of Ergun Block (SME), suggesting that the tectonic fr...
Abstract. The Zagros orogenic system resulted due to collision of the Arabian plate with Eurasian plate. region is characterized by ocean–continent subduction and continent–continent collision, convergence velocity shows variations from east west. Therefore, this complex tectonic stress a wide range diffuse or localized deformation between both plates. in situ GPS data are very limited sparsely...
South China, composed of the Yangtze and Cathaysia Blocks and the intervening Jiangnan orogenic belt, has been central to the debate on the tectonic evolution of East Asia. Here we investigate the crustal structure and composition of South China from seismic data employing the H-k stacking technique. Our results show that the composition and seismic structure of the crust in the Jiangnan orogen...
Balanced cross-sections across the Zagros fold–thrust belt in Iran are used to analyze the geometry of deformation within the sedimentary cover rocks, and to test the hypothesis of basement involved thrusting throughout the fold–thrust belt. Although the Zagros deformation front is a relatively rectilinear feature, the sinuous map-view morphology of the mountain front is a result of a 6 km stru...
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