Tectonic Elements of South flank in the east- centralAlborz Mountain

Category Tectonic & Seismotectonic
Group GSI.IR
Location 21th symposium on geosciences
Holding Date 24 May 2008

Abstract:
      Southern flanks of the east-central AlborzMountain consist 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 Sailent, 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 demonstrated by field evidences and focal mechanism solutions.

   General:
     Southern flanks of the east-central AlborzMountain consist 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 sihnificance curvatures at Alborz mountain belt that have introduced here such as Neyshabur- Esfarayen- Shahrud syntaxis and Damghan- Semnan- Qazvin Sailent, 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 demonstrated by field evidences and focal mechanism solutions

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