Geometrical parameter, Anticline, Sarkan, Zagros, Lurestan
Subject Areas :Reza Alipoor 1 , امیرحسین صدر 2 , farid shahmoradi 3 , عارف شمس‌زاده 4
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Keywords: Geometrical parameter, Anticline, Sarkan, Zagros, Lurestan ,
Abstract :
The Sarkan anticline is located in the Lurestan sedimentary-structural zone and in the Zagros fold and thrust belt. Geometry and kinematic of the fold of this zone are controlled by thrust faults and detachment levels. The exposed formations in this anticline are the upper Cretaceous and Cenozoic formations. In this research, geometry and deformational style analysis of the anticline and role of the detachment levels on folding style have been investigated using drawing four structural cross-sections, interpretation of the seismic profiles and calculation of geometric parameters. The structure of this anticline is affected by two detachment horizon, which is the flysch Amiran, and shaly Garu formations as the upper and middle detachment levels, respectively. The high thickness of the upper detachment level caused displacement of the surface anticline axis to the SW with respect to the deep anticline axis. The study of geometrical parameters and structural cross-sections of the Sarkan anticline exhibit that this structure is an asymmetric and noncylindrical anticline, and from tightness and aspect ratio view is ranked in the open to gentle and wide category, respectively.
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