TITLE:
Hydrocarbon Trap and Folding Style of the Pishvar Anticline, Sub-Coastal Fars, Zagros
AUTHORS:
Nafiseh Hajnorouzi, Mohsen Pourkemani, Zahra Maleki
KEYWORDS:
Pishvar Anticline, Fold Style, Razak Faults, Hydrocarbon Trap
JOURNAL NAME:
Open Journal of Geology,
Vol.6 No.6,
June
22,
2016
ABSTRACT: The Pishvar anticline with Northwest-Southeast trend is located in the
Sub-Coastal Fars area. This anticline with 80 Km length and 5 - 7 Km width is
located in western part of the Lar area. The Pishvar anticline has two closures
that are separated together by smooth down-warp. The oldest units that have
outcropped on the surfaces are Asmari and Jahrom Formations. The most faults
that observed on the Pishvar anticline are Normal fault. In the study area, the
Razak and Hendurabi faults are main faults. These faults are strike slip with
sinistral displacement. This anticline has greater dip in Northern flank
compared to Southern flank. In this research, the main aim is folding style
analysis, based on Description of fold geometry for indicate hydrocarbon trap
structure in the Pishvar anticline. Description of fold geometry is important
because they allow comparisons within and between folds and pattern-recognition
in addition to occurrence and distribution of fold systems. We used Tectonics
FP and Global Mapper Software for prepared some data in our study. In addition,
we used the common classification of folds for our research. Based on results,
the folding pattern of this anticline has indicated the fold style has
different type in different parts of the Pishvar anticline. According to fold
style variation and deformation analysis from B-B’ to C-C’ parts of the study
anticline, it seems that the location of the Razak sinistral strike slip fault
has existed in this parts. Fold style change can show this case. In addition,
fold style variation and deformation analysis from E-E’ to F-F’ parts of this
anticline has been affected of the secondary fault that is related to the Razak
sinistral strike slip fault. We introduced this fault for first time. Finally,
Based on results in this research, in western part there is little probability
for access to hydrocarbon trap in upper horizons, unless the exploratory drilling continues to the
deeper horizons.