Showing 2 results for زمین ساخت
Ali Yasaghi, Azin Imanpur,
Volume 13, Issue 4 (2-2014)
Abstract
Anbaran inlier is located at the NW of Namin city. In the inlier Pre-Paleozoic roks surrounded by young Eosen and Cretaceouse rocks.To interpret the inlier deformation and its evolution model, geometry as well as kinematic characteristic its major structurs analysed for the first time. For the faults kinematic, indicator, such as slickenside, fault associated folds and S-C structure were used. The results of analysis show that the major structurs of inlier are the Anbaran and RF1 fault at its Norht and South margins.The high angle Anbaran and RF1 faults cause thrusting of the Pre-Paleozoic Biandor and Soltanieh formation in the core of inlier over the Eocen volcanic units and Cretaceouce limeston respectively.This resulted in development of a pop-up structure that form the present morphology of the region .The fault high angele dip, and deposition of Cretaceous sediments on its hanging wall provide evidence for the fault inversion.therefor the RF1 fault is considered as the inverted anbaran fault backthrust.
Volume 18, Issue 50 (10-2005)
Abstract
Southern flank of the East– Central Alborz Mountain is consisting of several tectonic elements, which were introduced and analyzed, in this paper. This region is including a complex thrust system at north and a widespread foreland basin at south of Alborz– Central Iran border zone. Two significance curvatures at Alborz Mountain belt that have introduced here such as Neyshabur– Esfarayen– Shahrud Syntaxis and Damghan– Semnan– Qazvin Salient, had been created by change in trend of Alborz from NW– SE to NE–SW. According to this research, creative and activities of the fault systems in a sinistral displacement shear zone that had been elongated from south Semnan to north Gonbad–e Kavus was suggested as a cause to forming of above curvatures and thinning of Alborz width at north Bastam. Therefore, deformation in this region is a combination of compressional and left–lateral strike slip components that (Transpression) demonstrated by field evidences and focal mechanism solutions.
