Abstract
The Khalfani anticline is located in the Coastal Fars (Zagros, adjacent Persian Gulf). This anticline with Northwest-Southeast trend is a fault bend fold. In the study area, the Khalfani anticline has increased elevation from West to East with three distinct humps. The major faults in the study area are the Hendurabi and the Razak sinistral strike slip faults. Because analysis of fold and their folding styles in different parts system is important, the analysis of folding style elements is necessary for structural studies. The main aim of this research is structural style analysis based on fold style elements in the Khalfani anticline. This analysis is important for progress in hydrocarbons exploration in the Coastal Fars area. In this research, we used Tectonics FP and Global Mapper Software for preparing some data in our study. In addition, we used the common classification of folds for our research. Based on given results, the folding pattern of this anticline has indicated that the fold style is same in different parts of the Khalfani anticline. In the study area, based on classifications of fold in different methods, fold style is same together. Fold, with close sideways requires special attention as structural view; then the Khalfani Anticline with close style in all parts has special deformation and folding style. It seems that in the study area, folding style and variation of structural style have been created by effect of the Razak and the Hendurabi sinistral strike slip fault. Because these faults are basement or deep-seated faults, special folding style and special deformation can be formed in the study area. In addition, the Khalfani anticline in the study area has restricted within the Razak and the Hendurabi sinistral strike slip faults.
Highlights
The Zagros foreland basin was produced by construction of the Zagros fold-thrust belt during the Arabia-Eurasia collision [1]-[3]
In the Zagros fold-thrust belt, the Fars geological province, based on geological fancies units perpendicular to Zagros belt was divided into the Interior Fars, Sub-Coastal and Coastal Fars sub-basins [15] and the study area is located in the Coastal Fars sub-basin
With close sideways requires special attention as structural view; the Khalfani anticline with close style in all parts has special deformation and folding style. It seems that in the study area, folding style and variation of structural style have been created by effect of the Razak and the Hendurabi sinistral strike slip fault
Summary
The Zagros foreland basin was produced by construction of the Zagros fold-thrust belt during the Arabia-Eurasia collision [1]-[3]. Active deformation in the Zagros is caused by the northward motion of Arabia with respect to Eurasia, which occurs at a rate of 25 mm/year at longitude 561 E [11]-[14]. The deformation in this part of the belt is characterized by periodic folding with axial lengths sometimes greater than 200 km. The Folded Zone (SFZ) is orientation as southwestern boundary of the Zagros orogen near the Persian Gulf. The folds are capped by the Oligocene Asmari Limestone [16]-[18] and the sedimentary cover sequence is floored by the Hormuz Formation, a dominantly evaporate formation, which acts as a major decollement horizon [19]-[21]
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